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        <title>BrainStuff</title>
        <link>http://www.howstuffworks.com</link>
        <description>How does pressure-treated lumber work? Where do bullets go when guns are fired into the air? Join Marshall Brain as he explores the science behind everything from microwave popcorn to metal detectors.</description>
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        <copyright>Copyright 2011 HowStuffWorks.com</copyright>
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        <itunes:summary>How does pressure-treated lumber work? Where do bullets go when guns are fired into the air? Join Marshall Brain as he explores the science behind everything from microwave popcorn to metal detectors.</itunes:summary>
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            <title>Where do bullets go when guns are fired into the air?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-06-19-brainstuff-bullets-in-air.mp3</link>
            <description>When people fire guns into the air in a celebratory manner, those bullets have to go somewhere. Find out how high fired bullets can go -- and why they can be dangerous -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 19 Jun 2013 09:53:57 -0400</pubDate>
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            <itunes:subtitle>When people fire guns into the air in a celebratory manner, those bullets have to go somewhere. Find out how high fired bullets can go -- and why they can be dangerous -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
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        <item>
            <title>How does pressure-treated lumber work?</title>
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            <description>organisms. Find out why pressure-treated lumber holds up better -- and how it works -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 17 Jun 2013 09:16:27 -0400</pubDate>
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            <itunes:duration>00:03:10</itunes:duration>
            <itunes:subtitle>organisms. Find out why pressure-treated lumber holds up better -- and how it works -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do Mexican jumping beans work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-06-14-brainstuff-mexican-jumping-beans.mp3</link>
            <description>Although Mexican jumping beans don't actually jump, they're definitely more active than your average bean. Find out how a moth makes them move in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 12 Jun 2013 15:57:47 -0400</pubDate>
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            <itunes:duration>00:02:20</itunes:duration>
            <itunes:subtitle>Although Mexican jumping beans don't actually jump, they're definitely more active than your average bean. Find out how a moth makes them move in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a hybrid car work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-06-12-brainstuff-hybrid-car.mp3</link>
            <description>Hybrid cars combine electric motors and smaller gasoline engines in an attempt to increase efficiency. Find out exactly how they work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 12 Jun 2013 15:34:25 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-06-12-brainstuff-hybrid-car.mp3</guid>
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            <itunes:keywords>hybrid cars, howstuffworks, Marshall Brain, gas motor, electric motor</itunes:keywords>
            <itunes:duration>00:03:52</itunes:duration>
            <itunes:subtitle>Hybrid cars combine electric motors and smaller gasoline engines in an attempt to increase efficiency. Find out exactly how they work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What causes that howling sound in PA systems?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-06-10-brainstuff-feedback.mp3</link>
            <description>A public address system's speakers emit strange noises, or feedback, when sound gets re-amplified. Get a detailed explanation of how feedback occurs in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 10 Jun 2013 17:14:22 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-06-10-brainstuff-feedback.mp3</guid>
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            <itunes:duration>00:02:11</itunes:duration>
            <itunes:subtitle>A public address system's speakers emit strange noises, or feedback, when sound gets re-amplified. Get a detailed explanation of how feedback occurs in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How long before sharks start going extinct?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-06-07-brainstuff-shark.mp3</link>
            <description>Sharks are ancient, fierce creatures, but they're also in danger of extinction on many fronts. Discover all the factors that make sharks vulnerable -- and what you can do to help -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 07 Jun 2013 08:58:40 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-06-07-brainstuff-shark.mp3</guid>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>sharks, marshall, brainstuff, howstuffworks, discovery</itunes:keywords>
            <itunes:duration>00:03:58</itunes:duration>
            <itunes:subtitle>Sharks are ancient, fierce creatures, but they're also in danger of extinction on many fronts. Discover all the factors that make sharks vulnerable -- and what you can do to help -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What's the birthday paradox?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-06-05-brainstuff-birthday-paradox.mp3</link>
            <description>In a group of 20, there's a 50/50 chance that two people will have the same birthday; this is called the birthday paradox. Find out how it works in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 05 Jun 2013 09:22:43 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-06-05-brainstuff-birthday-paradox.mp3</guid>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>marshall, brain, birthday, paradox, brainstuff, howstuffworks</itunes:keywords>
            <itunes:duration>00:02:37</itunes:duration>
            <itunes:subtitle>In a group of 20, there's a 50/50 chance that two people will have the same birthday; this is called the birthday paradox. Find out how it works in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is carrageenan?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-06-03-brainstuff-carrageenan.mp3</link>
            <description>Carrageenan is a gum derived from seaweed that helps processed food withstand the rigors of transportation and long waits in warehouses. Learn more about the role that carrageenan plays in food by checking out this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 03 Jun 2013 13:40:02 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-06-03-brainstuff-carrageenan.mp3</guid>
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            <itunes:explicit>no</itunes:explicit>
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            <itunes:duration>00:03:26</itunes:duration>
            <itunes:subtitle>Carrageenan is a gum derived from seaweed that helps processed food withstand the rigors of transportation and long waits in warehouses. Learn more about the role that carrageenan plays in food by checking out this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does an Indiglo watch work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-31-brainstuff-indiglo.mp3</link>
            <description>An Indiglo watch works a lot like a neon sign, getting its signature &quot;glow&quot; from electroluminescence. Tune in to hear Marshall Brain explain the finer points of Indiglo watch technology in this podcast from HowStuffWorks.com.</description>
            <pubDate>Tue, 28 May 2013 14:55:16 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-31-brainstuff-indiglo.mp3</guid>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>Marshall Brain, HowStuffWorks, Indiglo, electroluminescence</itunes:keywords>
            <itunes:duration>00:02:49</itunes:duration>
            <itunes:subtitle>An Indiglo watch works a lot like a neon sign, getting its signature &quot;glow&quot; from electroluminescence. Tune in to hear Marshall Brain explain the finer points of Indiglo watch technology in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What makes NASCAR engines different from other engines?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-29-brainstuff-nascar-engines.mp3</link>
            <description>NASCAR engines are built for maximum efficiency, and they're much more powerful than regular engines. Marshall Brain discusses five ways in which NASCAR engines differ from regular ones in this episode.</description>
            <pubDate>Tue, 28 May 2013 13:19:05 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-29-brainstuff-nascar-engines.mp3</guid>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>Marshall Brain, HowStuffWorks, NASCAR, engines</itunes:keywords>
            <itunes:duration>00:05:22</itunes:duration>
            <itunes:subtitle>NASCAR engines are built for maximum efficiency, and they're much more powerful than regular engines. Marshall Brain discusses five ways in which NASCAR engines differ from regular ones in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do torpedo engines work if they're underwater?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-27-brainstuff-torpedo-engine.mp3</link>
            <description>Torpedo engines rely on special methods of propulsion to operate underwater. Find out what they are in this episode of BrainStuff.</description>
            <pubDate>Mon, 27 May 2013 13:38:52 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-27-brainstuff-torpedo-engine.mp3</guid>
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            <itunes:explicit>no</itunes:explicit>
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            <itunes:duration>00:02:46</itunes:duration>
            <itunes:subtitle>Torpedo engines rely on special methods of propulsion to operate underwater. Find out what they are in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a Crooke's radiometer work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-24-brainstuff-crookes-radiometer.mp3</link>
            <description>Vacuums and light combine to power a Crooke's radiometer -- but how does it work? Listen in and learn more about the mechanisms inside the radiometer in this podcast from HowStuffWorks.com.</description>
            <pubDate>Thu, 23 May 2013 11:21:22 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-24-brainstuff-crookes-radiometer.mp3</guid>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>cooke, radiometer, marshall, howstuffworks</itunes:keywords>
            <itunes:duration>00:02:07</itunes:duration>
            <itunes:subtitle>Vacuums and light combine to power a Crooke's radiometer -- but how does it work? Listen in and learn more about the mechanisms inside the radiometer in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is Friday the 13th considered unlucky?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-22-brainstuff-friday-the-13th.mp3</link>
            <description>In countries like the United States, people have a superstitious fear of one particular date: Friday the 13th. But why? In this episode, Marshall discusses the two main fears that have fueled the Friday the 13th superstitions, as well as their origins.</description>
            <pubDate>Wed, 22 May 2013 11:31:58 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-22-brainstuff-friday-the-13th.mp3</guid>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>marshall, brain, howstuffworks, friday, 13th, unlucky</itunes:keywords>
            <itunes:duration>00:04:56</itunes:duration>
            <itunes:subtitle>In countries like the United States, people have a superstitious fear of one particular date: Friday the 13th. But why? In this episode, Marshall discusses the two main fears that have fueled the Friday the 13th superstitions, as well as their origins.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why does my hard drive make that churning sound?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-20-brainstuff-hd-churning.mp3</link>
            <description>Inside the hard drive of many computers, a small arm moves across the face of the hard disk. Tune in to this podcast from HowStuffWorks.com to discover how the movement of this arm produces sound -- and why the arm must move to load files.</description>
            <pubDate>Mon, 20 May 2013 16:09:01 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-20-brainstuff-hd-churning.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, hard disk, why do hard disks churn, how hard disks work, computers</itunes:keywords>
            <itunes:duration>00:03:28</itunes:duration>
            <itunes:subtitle>Inside the hard drive of many computers, a small arm moves across the face of the hard disk. Tune in to this podcast from HowStuffWorks.com to discover how the movement of this arm produces sound -- and why the arm must move to load files.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do big city shell and three-card monte games work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-17-brainstuff-3-card-monte.mp3</link>
            <description>Shell games and three-card monte games are common sights in big cities, but did you know they're scams? Marshall explains the similar principles and tricks behind these &quot;games&quot; -- and why you can't win them -- in this episode.</description>
            <pubDate>Fri, 17 May 2013 12:39:47 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-17-brainstuff-3-card-monte.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, three-card monte, how three-card monte works, shell games, card games</itunes:keywords>
            <itunes:duration>00:05:56</itunes:duration>
            <itunes:subtitle>Shell games and three-card monte games are common sights in big cities, but did you know they're scams? Marshall explains the similar principles and tricks behind these &quot;games&quot; -- and why you can't win them -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How is wire measured?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-15-brainstuff-wire-diameter.mp3</link>
            <description>In the United States, wires are measured by diameter using a standard called AWG, or American Wire Gauge. Discover how the AWG system works -- and where it came from -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 15 May 2013 11:21:11 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-15-brainstuff-wire-diameter.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall brain, wire, american wire gauge, awg, wire diameter</itunes:keywords>
            <itunes:duration>00:01:55</itunes:duration>
            <itunes:subtitle>In the United States, wires are measured by diameter using a standard called AWG, or American Wire Gauge. Discover how the AWG system works -- and where it came from -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can I make artificial snow in my backyard?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-13-brainstuff-backyard-snow.mp3</link>
            <description>If you live in a cold enough climate, you can make fake snow just like they do for ski resorts. In this episode, Marshall shares two techniques for creating artificial snow in your own backyard -- and what to do if you live in a warm climate.</description>
            <pubDate>Mon, 13 May 2013 19:05:46 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-13-brainstuff-backyard-snow.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-13-brainstuff-backyard-snow.mp3' length='1315731' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall brain, artificial snow, snow in your backyard, fake snow</itunes:keywords>
            <itunes:duration>00:03:31</itunes:duration>
            <itunes:subtitle>If you live in a cold enough climate, you can make fake snow just like they do for ski resorts. In this episode, Marshall shares two techniques for creating artificial snow in your own backyard -- and what to do if you live in a warm climate.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What would happen on a carousel moving at the speed of light?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-10-brainstuff-light-carosel.mp3</link>
            <description>If you could spin a carousel fast enough, would time stand still for the people on the carousel? Theoretically, it's a reasonable assumption. Join Marshall Brain as he breaks down the speed of light and time in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 10 May 2013 12:31:31 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-10-brainstuff-light-carosel.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, carousel, speed of light, relativity, time, how to make time stand still</itunes:keywords>
            <itunes:duration>00:02:58</itunes:duration>
            <itunes:subtitle>If you could spin a carousel fast enough, would time stand still for the people on the carousel? Theoretically, it's a reasonable assumption. Join Marshall Brain as he breaks down the speed of light and time in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a fossil?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-08-brainstuff-fossils.mp3</link>
            <description>Fossils provide us with an important picture of ancient life. But how is a fossil created, exactly? Marshall Brain breaks down the various natural processes behind fossilization in this episode.</description>
            <pubDate>Wed, 08 May 2013 17:21:37 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-08-brainstuff-fossils.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-08-brainstuff-fossils.mp3' length='2129178' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, fossil, fossilization, ancient life, science, how do fossils form</itunes:keywords>
            <itunes:duration>00:05:47</itunes:duration>
            <itunes:subtitle>Fossils provide us with an important picture of ancient life. But how is a fossil created, exactly? Marshall Brain breaks down the various natural processes behind fossilization in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is leather and where does it come from?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-06-brainstuff-leather.mp3</link>
            <description>Most leather is made from processed cattle skin, although synthetic and other varieties exist. Learn more about leather in this episode of BrainStuff.</description>
            <pubDate>Mon, 06 May 2013 17:52:40 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-06-brainstuff-leather.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-06-brainstuff-leather.mp3' length='2112564' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, leather, synthetic leather, tanning, what is leather, how does leather work</itunes:keywords>
            <itunes:duration>00:05:45</itunes:duration>
            <itunes:subtitle>Most leather is made from processed cattle skin, although synthetic and other varieties exist. Learn more about leather in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What's the best way to back up a computer's hard disk?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-03-brainstuff-backup-hard-disk.mp3</link>
            <description>Your computer's hard disk stores all your information, but what happens if it gets damaged or dies? In this episode, Marshall Brain explains why it's important to back up your hard disk and weighs the advantages and disadvantages of three backup methods.</description>
            <pubDate>Fri, 03 May 2013 16:18:40 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-03-brainstuff-backup-hard-disk.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-03-brainstuff-backup-hard-disk.mp3' length='2489678' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, hard disk, back up hard disk, computer storage, software, how to save your hard drive</itunes:keywords>
            <itunes:duration>00:06:47</itunes:duration>
            <itunes:subtitle>Your computer's hard disk stores all your information, but what happens if it gets damaged or dies? In this episode, Marshall Brain explains why it's important to back up your hard disk and weighs the advantages and disadvantages of three backup methods.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does bulletproof glass work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-01-brainstuff-bulletproof-glass.mp3</link>
            <description>Bullet-resistant glass, commonly referred to as &quot;&quot;bulletproof,&quot;&quot; is a special type of glass designed to resist bullets. Tune in to this episode to learn how different types of bullet-resistant glass work.</description>
            <pubDate>Wed, 01 May 2013 18:04:52 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-05-01-brainstuff-bulletproof-glass.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, bulletproof glass, how bulletproof glass</itunes:keywords>
            <itunes:duration>00:03:33</itunes:duration>
            <itunes:subtitle>Bullet-resistant glass, commonly referred to as &quot;&quot;bulletproof,&quot;&quot; is a special type of glass designed to resist bullets. Tune in to this episode to learn how different types of bullet-resistant glass work.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What does tear gas do?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-29-brainstuff-tear-gas.mp3</link>
            <description>You've probably heard of tear gas before, but did you know that Mace is a form of it? Learn more about the three commonly used types of tear gas -- how they work and what they're used for -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 29 Apr 2013 16:46:51 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-29-brainstuff-tear-gas.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, tear gas, mace, how tear gas works</itunes:keywords>
            <itunes:duration>00:01:53</itunes:duration>
            <itunes:subtitle>You've probably heard of tear gas before, but did you know that Mace is a form of it? Learn more about the three commonly used types of tear gas -- how they work and what they're used for -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a Dippy Bird work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-26-brainstuff-dippy-bird.mp3</link>
            <description>A Dippy Bird is a strange-looking novelty toy, but how does it work? Marshall Brain breaks down the surprisingly sophisticated mechanics of the Dippy Bird in this episode.</description>
            <pubDate>Fri, 26 Apr 2013 14:03:02 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-26-brainstuff-dippy-bird.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-26-brainstuff-dippy-bird.mp3' length='1592863' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, dippy bird, novelty toy, how dippy birds work, toy mechanics</itunes:keywords>
            <itunes:duration>00:04:17</itunes:duration>
            <itunes:subtitle>A Dippy Bird is a strange-looking novelty toy, but how does it work? Marshall Brain breaks down the surprisingly sophisticated mechanics of the Dippy Bird in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What are the fastest hard disks available today?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-24-brainstuff-fastest-hard-disk.mp3</link>
            <description>Hard disk drives and connections have been getting faster and faster. In this episode, Marshall discusses the evolution of the hard disk and the shockingly fast drives available today.</description>
            <pubDate>Wed, 24 Apr 2013 14:56:37 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-24-brainstuff-fastest-hard-disk.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, hard disk drives, fastest disk drive, fastest hard disk, computers, computer disks</itunes:keywords>
            <itunes:duration>00:03:06</itunes:duration>
            <itunes:subtitle>Hard disk drives and connections have been getting faster and faster. In this episode, Marshall discusses the evolution of the hard disk and the shockingly fast drives available today.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do I burn calories on a stair machine?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-22-brainstuff-stair-machine.mp3</link>
            <description>If you've ever sweated your way through a work-out on a stair machine, you know that calories are definitely being burned in the process. But how? Learn more about foot-pounds, horsepower and stair machines in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 22 Apr 2013 15:38:33 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-22-brainstuff-stair-machine.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-22-brainstuff-stair-machine.mp3' length='1216048' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, marshall brain, stair machine, fitness, health, gym,</itunes:keywords>
            <itunes:duration>00:03:15</itunes:duration>
            <itunes:subtitle>If you've ever sweated your way through a work-out on a stair machine, you know that calories are definitely being burned in the process. But how? Learn more about foot-pounds, horsepower and stair machines in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why use a humidifier in your home in the winter?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-19-brainstuff-humidifiers.mp3</link>
            <description>Lots of people use humidifiers in their homes, especially in winter. But why? Marshall discusses some advantages of using humidifiers (and disadvantages of not using them) and different types of home humidifiers.</description>
            <pubDate>Fri, 19 Apr 2013 14:36:03 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-19-brainstuff-humidifiers.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-19-brainstuff-humidifiers.mp3' length='1498325' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall brain, humidifiers, humidity, air conditioning, winter, climate</itunes:keywords>
            <itunes:duration>00:04:02</itunes:duration>
            <itunes:subtitle>Lots of people use humidifiers in their homes, especially in winter. But why? Marshall discusses some advantages of using humidifiers (and disadvantages of not using them) and different types of home humidifiers.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does rust work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-17-brainstuff-rust.mp3</link>
            <description>In this episode of BrainStuff, Marshall Brain explains the chemistry behind rust, or iron oxide, and the rusting process.</description>
            <pubDate>Wed, 17 Apr 2013 14:35:16 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-17-brainstuff-rust.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, marshall, rust, iron oxide, decay, chemistry, rust chemistry</itunes:keywords>
            <itunes:duration>00:02:50</itunes:duration>
            <itunes:subtitle>In this episode of BrainStuff, Marshall Brain explains the chemistry behind rust, or iron oxide, and the rusting process.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is sodium nitrate?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-15-brainstuff-sodium-nitrate.mp3</link>
            <description>You'll find sodium nitrate in lots of pink meats like hot dogs and salami, but why? And is it bad for you? Find out what's up with sodium nitrate in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 15 Apr 2013 17:25:53 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-15-brainstuff-sodium-nitrate.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, sodium nitrate, pink meat, nutrition, food additive, food science</itunes:keywords>
            <itunes:duration>00:02:39</itunes:duration>
            <itunes:subtitle>You'll find sodium nitrate in lots of pink meats like hot dogs and salami, but why? And is it bad for you? Find out what's up with sodium nitrate in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What would happen if you fired a gun on a moving train?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-12-brainstuff-gun-from-train.mp3</link>
            <description>If you fired a gun from a train moving at the speed of a bullet, what would happen? It depends on your frame of reference. Learn more about reference frames and physics in this episode of BrainStuff.</description>
            <pubDate>Fri, 12 Apr 2013 16:19:06 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-12-brainstuff-gun-from-train.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall brain, brainstuff, shoot gun from train, physics, frame of reference</itunes:keywords>
            <itunes:duration>00:04:00</itunes:duration>
            <itunes:subtitle>If you fired a gun from a train moving at the speed of a bullet, what would happen? It depends on your frame of reference. Learn more about reference frames and physics in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do they make fortune cookies?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-10-brainstuff-fortune-cookies.mp3</link>
            <description>You've probably had countless fortune cookies after Chinese meals, but have you ever wondered how they're made? Discover the &quot;food technology&quot; behind those prescient little cookies in this episode of BrainStuff.</description>
            <pubDate>Wed, 10 Apr 2013 13:56:23 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-10-brainstuff-fortune-cookies.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-10-brainstuff-fortune-cookies.mp3' length='1030161' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, marshall, fortune cookies, food, chinese food in the united states, food technology</itunes:keywords>
            <itunes:duration>00:02:44</itunes:duration>
            <itunes:subtitle>You've probably had countless fortune cookies after Chinese meals, but have you ever wondered how they're made? Discover the &quot;food technology&quot; behind those prescient little cookies in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What are dissolvable stitches?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-08-brainstuff-dissolvable-stitches.mp3</link>
            <description>Stitches have been used for centuries, but dissolvable ones are the most common these days. Why would you want stitches to dissolve, and how do they work? In this episode, Marshall discusses the benefits and features of absorbable sutures.</description>
            <pubDate>Mon, 08 Apr 2013 16:32:35 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-08-brainstuff-dissolvable-stitches.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, stitches, dissolvable stitches, medicine, trauma, medical care</itunes:keywords>
            <itunes:duration>00:03:33</itunes:duration>
            <itunes:subtitle>Stitches have been used for centuries, but dissolvable ones are the most common these days. Why would you want stitches to dissolve, and how do they work? In this episode, Marshall discusses the benefits and features of absorbable sutures.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why should you wash new clothes before wearing them?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-05-brainstuff-wash-new-clothes.mp3</link>
            <description>Some clothes have tags that say &quot;wash before wearing&quot; or &quot;wash separately.&quot; Find out why it's sometimes a good idea to wash new clothes before you wear them in this episode.</description>
            <pubDate>Fri, 05 Apr 2013 17:12:09 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-05-brainstuff-wash-new-clothes.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-05-brainstuff-wash-new-clothes.mp3' length='1046307' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall brain, wash before wearing, wash new clothes, wash separately</itunes:keywords>
            <itunes:duration>00:02:47</itunes:duration>
            <itunes:subtitle>Some clothes have tags that say &quot;wash before wearing&quot; or &quot;wash separately.&quot; Find out why it's sometimes a good idea to wash new clothes before you wear them in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do dry chemical fire extinguishers work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-03-brainstuff-fire-extinguisher.mp3</link>
            <description>Three elements create a fire. Discover what they are and how dry chemical fire extinguishers combat them in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 03 Apr 2013 15:41:20 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-03-brainstuff-fire-extinguisher.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-03-brainstuff-fire-extinguisher.mp3' length='1277335' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, marshall, fire extinguisher, dry chemical fire extinguisher</itunes:keywords>
            <itunes:duration>00:03:25</itunes:duration>
            <itunes:subtitle>Three elements create a fire. Discover what they are and how dry chemical fire extinguishers combat them in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does satellite Internet work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-01-brainstuff-satellite-internet.mp3</link>
            <description>If you're trying to access the Internet in a very rural or remote place, satellite Internet is probably your best bet. In this episode, Marshall explains how satellite Internet works.</description>
            <pubDate>Mon, 01 Apr 2013 17:05:24 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-01-brainstuff-satellite-internet.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-04-01-brainstuff-satellite-internet.mp3' length='1478897' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, satellite internet, communication, relay, telecommunication, technology, rural internet</itunes:keywords>
            <itunes:duration>00:03:58</itunes:duration>
            <itunes:subtitle>If you're trying to access the Internet in a very rural or remote place, satellite Internet is probably your best bet. In this episode, Marshall explains how satellite Internet works.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is low-power FM (LPFM)?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-29-brainstuff-lpfm-stations.mp3</link>
            <description>FM radio stations have high operating costs, so they're seldom affordable to individuals and small organizations that want to use them for not-for-profit purposes. Find out how LPFM stations work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 29 Mar 2013 19:05:34 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-29-brainstuff-lpfm-stations.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-29-brainstuff-lpfm-stations.mp3' length='1169811' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, lpfm, low-power fm, radio, radio stations</itunes:keywords>
            <itunes:duration>00:03:07</itunes:duration>
            <itunes:subtitle>FM radio stations have high operating costs, so they're seldom affordable to individuals and small organizations that want to use them for not-for-profit purposes. Find out how LPFM stations work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do scratch-and-sniff stickers work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-27-brainstuff-scratch-resist-coating.mp3</link>
            <description>Scratch-and-sniff stickers are novelties that delight both children and adults. Sniff out the ingenious technology that makes them work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 27 Mar 2013 17:54:56 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-27-brainstuff-scratch-resist-coating.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-27-brainstuff-scratch-resist-coating.mp3' length='1262296' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, scratch-and-sniff, sticker, novelties, smell, olfactory technology</itunes:keywords>
            <itunes:duration>00:03:22</itunes:duration>
            <itunes:subtitle>Scratch-and-sniff stickers are novelties that delight both children and adults. Sniff out the ingenious technology that makes them work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a vactrain?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-25-brainstuff-vactrain.mp3</link>
            <description>Vactrains may be the next big thing in the evolution of high-speed transportation. In this episode, Marshall explains how vactrain systems will work, how close they are to becoming reality and the potential they have to impact global transportation.</description>
            <pubDate>Mon, 25 Mar 2013 15:31:41 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-25-brainstuff-vactrain.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-25-brainstuff-vactrain.mp3' length='2050028' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, vactrain, high-speed transportation, transportation, transit, trains</itunes:keywords>
            <itunes:duration>00:05:34</itunes:duration>
            <itunes:subtitle>Vactrains may be the next big thing in the evolution of high-speed transportation. In this episode, Marshall explains how vactrain systems will work, how close they are to becoming reality and the potential they have to impact global transportation.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Can you explain the diameter measurements used in bullets?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-22-brainstuff-bullet-caliber.mp3</link>
            <description>Bullets are measured by calibers, which indicate their diameter in inches. Find out more about bullets and measurement in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 22 Mar 2013 16:07:27 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-22-brainstuff-bullet-caliber.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-22-brainstuff-bullet-caliber.mp3' length='779386' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, bullets, calibers, bullet caliber, bullet size, firearms, guns</itunes:keywords>
            <itunes:duration>00:02:02</itunes:duration>
            <itunes:subtitle>Bullets are measured by calibers, which indicate their diameter in inches. Find out more about bullets and measurement in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How are movies stored on DVD discs?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-20-brainstuff-dvd.mp3</link>
            <description>How can you store an entire movie on one little DVD disc? It's all about compression! In this episode, Marshall explains the technical details and standards of video compression.</description>
            <pubDate>Wed, 20 Mar 2013 15:59:19 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-20-brainstuff-dvd.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-20-brainstuff-dvd.mp3' length='1744234' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, dvd, compression, video compression, audio video technology, entertainment, film</itunes:keywords>
            <itunes:duration>00:04:43</itunes:duration>
            <itunes:subtitle>How can you store an entire movie on one little DVD disc? It's all about compression! In this episode, Marshall explains the technical details and standards of video compression.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What do those diamond-shaped signs on buildings mean?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-18-brainstuff-nfa-panel.mp3</link>
            <description>The National Fire Protection Agency, or NFPA, uses these signs to indicate hazardous materials stored in an unknown building. Listen in to learn how the signs work -- and how they help firefighters -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 18 Mar 2013 15:58:09 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-18-brainstuff-nfa-panel.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-18-brainstuff-nfa-panel.mp3' length='1346604' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, nfa, national fire protection agency, nfpa, hazmat, mazardous materials</itunes:keywords>
            <itunes:duration>00:03:36</itunes:duration>
            <itunes:subtitle>The National Fire Protection Agency, or NFPA, uses these signs to indicate hazardous materials stored in an unknown building. Listen in to learn how the signs work -- and how they help firefighters -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How cell phones work</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-15-brainstuff-cell-phone.mp3</link>
            <description>Today's cell phones are amazingly compact, complex devices that provide a wide array of services. Discover the origins of these technological wonders, and the technology that makes them work, in this episode of BrainStuff.</description>
            <pubDate>Fri, 15 Mar 2013 16:21:47 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-15-brainstuff-cell-phone.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-15-brainstuff-cell-phone.mp3' length='1612270' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, cell phone, cell phones, telecommunications, phones, telephony, wireless communication</itunes:keywords>
            <itunes:duration>00:04:21</itunes:duration>
            <itunes:subtitle>Today's cell phones are amazingly compact, complex devices that provide a wide array of services. Discover the origins of these technological wonders, and the technology that makes them work, in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a toaster work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-13-brainstuff-toaster.mp3</link>
            <description>Toasting is a tasty way to increase the durability of bread, and automatic toasters are a convenient way to make toast. Learn more about the chemical change that turns bread into toast and the mechanism behind toasters in this episode of BrainStuff.</description>
            <pubDate>Wed, 13 Mar 2013 13:22:48 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-13-brainstuff-toaster.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-13-brainstuff-toaster.mp3' length='1907712' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, toaster, toasting, bread, nutrition, cooking, toast, how a toaster works</itunes:keywords>
            <itunes:duration>00:05:10</itunes:duration>
            <itunes:subtitle>Toasting is a tasty way to increase the durability of bread, and automatic toasters are a convenient way to make toast. Learn more about the chemical change that turns bread into toast and the mechanism behind toasters in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do terrorist bombs work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-11-brainstuff-terrorist-bombs.mp3</link>
            <description>Terrorists have a new way of getting bombs into the United States: mailing them. In this episode, Marshall breaks down the science behind the types of bombs used by terrorists, and the explosive ingredients involved.</description>
            <pubDate>Mon, 11 Mar 2013 16:13:59 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-11-brainstuff-terrorist-bombs.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-11-brainstuff-terrorist-bombs.mp3' length='2270404' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, terrorist bombs, terrorism, bomb making, mail bombs, smuggling</itunes:keywords>
            <itunes:duration>00:06:10</itunes:duration>
            <itunes:subtitle>Terrorists have a new way of getting bombs into the United States: mailing them. In this episode, Marshall breaks down the science behind the types of bombs used by terrorists, and the explosive ingredients involved.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do most cars use gasoline instead of diesel?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-08-brainstuff-diesel.mp3</link>
            <description>Diesel engines are more efficient than engines that run on gasoline, yet they've never really caught on in passenger cars in the United States. Discover the many reasons why diesel engines aren't the norm in this episode of BrainStuff.</description>
            <pubDate>Fri, 08 Mar 2013 13:13:34 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-08-brainstuff-diesel.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-08-brainstuff-diesel.mp3' length='1405376' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, gasoline, diesel engine, automobiles, diesel, fuel</itunes:keywords>
            <itunes:duration>00:03:47</itunes:duration>
            <itunes:subtitle>Diesel engines are more efficient than engines that run on gasoline, yet they've never really caught on in passenger cars in the United States. Discover the many reasons why diesel engines aren't the norm in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is it possible to carbonate your own water?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-06-brainstuff-carbonated-water.mp3</link>
            <description>If you enjoy drinking carbonated water, this episode's for you! Listen in as Marshall Brain explains how to make your own carbonated water at home for a fraction of the price you pay in stores.</description>
            <pubDate>Wed, 06 Mar 2013 15:23:02 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-06-brainstuff-carbonated-water.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-06-brainstuff-carbonated-water.mp3' length='2566477' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, carbonated water, water, diy, make carbonated water, carbonate water</itunes:keywords>
            <itunes:duration>00:07:00</itunes:duration>
            <itunes:subtitle>If you enjoy drinking carbonated water, this episode's for you! Listen in as Marshall Brain explains how to make your own carbonated water at home for a fraction of the price you pay in stores.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does Caller ID work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-04-brainstuff-caller-id.mp3</link>
            <description>Almost all cell phones have a capacity for caller ID, which identifies the phone number at the other end of a telephone connection -- but how does it work? Listen in as Marshall Brain breaks down the basics of this surprisingly simple technology.</description>
            <pubDate>Mon, 04 Mar 2013 16:24:02 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-04-brainstuff-caller-id.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-04-brainstuff-caller-id.mp3' length='1286888' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, caller id, cell phones, telephony, telephone lines, telecoms, communication</itunes:keywords>
            <itunes:duration>00:03:24</itunes:duration>
            <itunes:subtitle>Almost all cell phones have a capacity for caller ID, which identifies the phone number at the other end of a telephone connection -- but how does it work? Listen in as Marshall Brain breaks down the basics of this surprisingly simple technology.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is there a way to detect illegal phone taps?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-01-brainstuff-phone-taps.mp3</link>
            <description>Tapping into someone's phone line is relatively easy to do on a land line. Fortunately, phone taps are easy to detect. Tune in to this podcast from HowStuffWorks.com to get Marshall Brain's tips on ferreting out illegal phone taps.</description>
            <pubDate>Fri, 01 Mar 2013 16:30:09 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-01-brainstuff-phone-taps.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-03-01-brainstuff-phone-taps.mp3' length='949596' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, phone taps, wire tap, landline, brainstuff</itunes:keywords>
            <itunes:duration>00:02:30</itunes:duration>
            <itunes:subtitle>Tapping into someone's phone line is relatively easy to do on a land line. Fortunately, phone taps are easy to detect. Tune in to this podcast from HowStuffWorks.com to get Marshall Brain's tips on ferreting out illegal phone taps.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does an EPIRB distress radio work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-27-brainstuff-epirb.mp3</link>
            <description>An EPIRB, or Emergency Position Indicating Radio Beacon, helps rescuers find people -- mostly boaters -- in emergency situations. Tune in to find out how EPIRB radios work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 27 Feb 2013 11:20:47 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-27-brainstuff-epirb.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-27-brainstuff-epirb.mp3' length='1061499' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, epirb, emergency position indicating radio beacon, emergency situations, boating, survival</itunes:keywords>
            <itunes:duration>00:02:49</itunes:duration>
            <itunes:subtitle>An EPIRB, or Emergency Position Indicating Radio Beacon, helps rescuers find people -- mostly boaters -- in emergency situations. Tune in to find out how EPIRB radios work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What are motion cards and how do they work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-25-brainstuff-motion-cards.mp3</link>
            <description>Motion cards, which have been around for decades, give the illusion of motion using  multiple images and a special printing process. In this episode, Marshall discusses the technology behind motion cards and how it has improved over the years.</description>
            <pubDate>Mon, 25 Feb 2013 13:01:57 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-25-brainstuff-motion-cards.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-25-brainstuff-motion-cards.mp3' length='1250058' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, motion card, animation, motion card technology</itunes:keywords>
            <itunes:duration>00:03:20</itunes:duration>
            <itunes:subtitle>Motion cards, which have been around for decades, give the illusion of motion using  multiple images and a special printing process. In this episode, Marshall discusses the technology behind motion cards and how it has improved over the years.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do artificial flavors work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-22-brainstuff-artificial-flavors.mp3</link>
            <description>Artificial flavors imitate natural flavors and are found in many processed products. Learn more about the chemistry of flavors, both natural and artificial, in this episode of BrainStuff.</description>
            <pubDate>Fri, 22 Feb 2013 17:09:56 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-22-brainstuff-artificial-flavors.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-22-brainstuff-artificial-flavors.mp3' length='1180474' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, ben bowlin, artificial flavors, natural flavors, food, health, nutrition, food science</itunes:keywords>
            <itunes:duration>00:03:09</itunes:duration>
            <itunes:subtitle>Artificial flavors imitate natural flavors and are found in many processed products. Learn more about the chemistry of flavors, both natural and artificial, in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do nail penny measurements work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-20-brainstuff-nail-pennies.mp3</link>
            <description>Nails are measured by a unit called a penny. This podcast from HowStuffWorks.com explains what the penny designation means -- and where it comes from.</description>
            <pubDate>Wed, 20 Feb 2013 15:36:39 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-20-brainstuff-nail-pennies.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, nail pennies, halfpenny nail, penny measurements, measuring units</itunes:keywords>
            <itunes:duration>00:02:09</itunes:duration>
            <itunes:subtitle>Nails are measured by a unit called a penny. This podcast from HowStuffWorks.com explains what the penny designation means -- and where it comes from.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What can you do to make yourself really unhappy?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-18-brainstuff-unhappy.mp3</link>
            <description>There are lots of articles and research on happiness these days, but what about unhappiness? What makes us unhappy, and will avoiding it make us happy? In this episode, Marshall points out three behaviors that are sure to create unhappiness.</description>
            <pubDate>Mon, 18 Feb 2013 12:27:29 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-18-brainstuff-unhappy.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-18-brainstuff-unhappy.mp3' length='1890158' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, happiness, unhappy, behavior, cognition, psychology, satisfaction</itunes:keywords>
            <itunes:duration>00:05:08</itunes:duration>
            <itunes:subtitle>There are lots of articles and research on happiness these days, but what about unhappiness? What makes us unhappy, and will avoiding it make us happy? In this episode, Marshall points out three behaviors that are sure to create unhappiness.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is making my backyard sparkle at night?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-15-brainstuff-backyard-sparkle-spiders.mp3</link>
            <description>One night, Marshall went outside with a headlight lamp on his head and discovered that his backyard was full of sparkling reflections. What were these sparkles? Discover the surprising answer in this episode.</description>
            <pubDate>Fri, 15 Feb 2013 13:36:16 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-15-brainstuff-backyard-sparkle-spiders.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, backyard sparkle, spiders, headlamp, webs, spider silk</itunes:keywords>
            <itunes:duration>00:04:02</itunes:duration>
            <itunes:subtitle>One night, Marshall went outside with a headlight lamp on his head and discovered that his backyard was full of sparkling reflections. What were these sparkles? Discover the surprising answer in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a movie clapperboard work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-13-brainstuff-clapperboard.mp3</link>
            <description>A movie clapperboard isn't just a placemarker; this device helps movie makers synchronize a movie's audio and video elements. Find out how a traditional movie clapperboard works, as well as a digital one, in this episode of BrainStuff.</description>
            <pubDate>Wed, 13 Feb 2013 16:28:20 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-13-brainstuff-clapperboard.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-13-brainstuff-clapperboard.mp3' length='1145047' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall brain, movie clapperboard, av, audio, visual, film</itunes:keywords>
            <itunes:duration>00:03:03</itunes:duration>
            <itunes:subtitle>A movie clapperboard isn't just a placemarker; this device helps movie makers synchronize a movie's audio and video elements. Find out how a traditional movie clapperboard works, as well as a digital one, in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What's that bumpy stuff on my ceiling?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-11-brainstuff-popcorn-ceiling.mp3</link>
            <description>That popcorn-like stuff on your ceiling is actually a specific kind of ceiling finish. Tune in to this podcast from HowStuffWorks.com to find out what this treatment is -- and why it's so popular.</description>
            <pubDate>Mon, 11 Feb 2013 13:46:15 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-11-brainstuff-popcorn-ceiling.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-11-brainstuff-popcorn-ceiling.mp3' length='876876' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, ben, popcorn ceiling, design, interior design</itunes:keywords>
            <itunes:duration>00:02:18</itunes:duration>
            <itunes:subtitle>That popcorn-like stuff on your ceiling is actually a specific kind of ceiling finish. Tune in to this podcast from HowStuffWorks.com to find out what this treatment is -- and why it's so popular.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Could I see a flashlight beam from Earth on the moon?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-08-brainstuff-moon-flashlight.mp3</link>
            <description>If you shone a flashlight beam from Earth, would you be able to see it from the moon? It depends. Find out why -- and get a lesson in how light works -- in this episode of BrainStuff.</description>
            <pubDate>Fri, 08 Feb 2013 12:08:42 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-08-brainstuff-moon-flashlight.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-08-brainstuff-moon-flashlight.mp3' length='1342221' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, moon, flashlight, optics, physics, science, space, light</itunes:keywords>
            <itunes:duration>00:03:36</itunes:duration>
            <itunes:subtitle>If you shone a flashlight beam from Earth, would you be able to see it from the moon? It depends. Find out why -- and get a lesson in how light works -- in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do trick birthday candles work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-06-brainstuff-trick-candle.mp3</link>
            <description>Candles are simple yet ingenious light-producing devices, and it only takes one extra ingredient to turn them into trick candles. Find out how regular and trick candles work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 06 Feb 2013 13:36:49 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-06-brainstuff-trick-candle.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, trick candle, chemistry, novelty candles, birthday candles, pranks</itunes:keywords>
            <itunes:duration>00:05:12</itunes:duration>
            <itunes:subtitle>Candles are simple yet ingenious light-producing devices, and it only takes one extra ingredient to turn them into trick candles. Find out how regular and trick candles work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does CCC, the new form of CPR, work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-04-brainstuff-ccc.mp3</link>
            <description>Continuous chest compression is an updated form of CPR that's much easier to administer -- and, studies suggest, more effective. In this episode, Marshall Brain explains how CCC works.</description>
            <pubDate>Mon, 04 Feb 2013 11:52:10 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-04-brainstuff-ccc.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-04-brainstuff-ccc.mp3' length='1171368' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, ccc, continous chest compression, cpr, medicine, emt, emergency medical aid</itunes:keywords>
            <itunes:duration>00:03:07</itunes:duration>
            <itunes:subtitle>Continuous chest compression is an updated form of CPR that's much easier to administer -- and, studies suggest, more effective. In this episode, Marshall Brain explains how CCC works.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Where did the hamburger get its name?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-01-brainstuff-hamburger.mp3</link>
            <description>The word 'hamburger' seems to imply that pork is a main ingredient, but in fact, this famous beef sandwich got its name from a city. Learn more about the origins and spread of the hamburger in this episode of BrainStuff.</description>
            <pubDate>Fri, 01 Feb 2013 14:44:32 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-01-brainstuff-hamburger.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-02-01-brainstuff-hamburger.mp3' length='1001944' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, hamburger, food history, invention of hamburger, food</itunes:keywords>
            <itunes:duration>00:02:39</itunes:duration>
            <itunes:subtitle>The word 'hamburger' seems to imply that pork is a main ingredient, but in fact, this famous beef sandwich got its name from a city. Learn more about the origins and spread of the hamburger in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do self-setting clocks work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-30-brainstuff-self-setting-clocks.mp3</link>
            <description>Self-setting clocks and watches synchronize themselves with the atomic clock in Colorado with the help of a special radio station. Find out how -- and learn more about NIST's radio station -- in this episode.</description>
            <pubDate>Wed, 30 Jan 2013 11:37:49 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-30-brainstuff-self-setting-clocks.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-30-brainstuff-self-setting-clocks.mp3' length='1421846' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, self-setting clocks, technology, time, alarm clocks, watches, atomic clock, radio station, nist</itunes:keywords>
            <itunes:duration>00:03:49</itunes:duration>
            <itunes:subtitle>Self-setting clocks and watches synchronize themselves with the atomic clock in Colorado with the help of a special radio station. Find out how -- and learn more about NIST's radio station -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What gives a Harley its distinctive sound?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-28-brainstuff-harley-sound.mp3</link>
            <description>A Harley Davidson motorcycle emits a very distinctive sound because of the unique way its engine works. Find out more in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 28 Jan 2013 15:05:08 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-28-brainstuff-harley-sound.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-28-brainstuff-harley-sound.mp3' length='1271061' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, harley sound, motorcycle, engines, biking, auto, engineering</itunes:keywords>
            <itunes:duration>00:03:24</itunes:duration>
            <itunes:subtitle>A Harley Davidson motorcycle emits a very distinctive sound because of the unique way its engine works. Find out more in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do tools have &quot;drop forged&quot; stamped on them?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-25-brainstuff-drop-forge.mp3</link>
            <description>Tools that say &quot;drop forged&quot; have been created using a technique called drop forging. Find out how drop forging and several other kinds of forging work, and why drop forging is a sign of a sturdy tool, in this episode of BrainStuff.</description>
            <pubDate>Fri, 25 Jan 2013 16:05:59 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-25-brainstuff-drop-forge.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall brain, drop forged, tools, manufacturing, forging</itunes:keywords>
            <itunes:duration>00:02:58</itunes:duration>
            <itunes:subtitle>Tools that say &quot;drop forged&quot; have been created using a technique called drop forging. Find out how drop forging and several other kinds of forging work, and why drop forging is a sign of a sturdy tool, in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do mood rings work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-23-brainstuff-mood-ring.mp3</link>
            <description>Mood rings claim to reflect changes in your emotional state -- and, in a way, they do. Discover the science behind mood rings in this episode of BrainStuff.</description>
            <pubDate>Wed, 23 Jan 2013 14:32:41 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-23-brainstuff-mood-ring.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-23-brainstuff-mood-ring.mp3' length='1692831' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, mood ring, body temperature, emotion, perception, biology, health, novelty</itunes:keywords>
            <itunes:duration>00:04:34</itunes:duration>
            <itunes:subtitle>Mood rings claim to reflect changes in your emotional state -- and, in a way, they do. Discover the science behind mood rings in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do jet engines start?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-21-brainstuff-starting-jet-engine.mp3</link>
            <description>If you've ever watched a jet engine start, you've probably noticed that the blades begin to rotate slowly before spinning up to full speed -- but why? Listen in as Marshall Brain breaks down the science behind jet engines in this episode.</description>
            <pubDate>Mon, 21 Jan 2013 14:03:30 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-21-brainstuff-starting-jet-engine.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-21-brainstuff-starting-jet-engine.mp3' length='1235645' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, jet engine, start jet, jet fuel, aerodynamics, aircraft, flight</itunes:keywords>
            <itunes:duration>00:03:18</itunes:duration>
            <itunes:subtitle>If you've ever watched a jet engine start, you've probably noticed that the blades begin to rotate slowly before spinning up to full speed -- but why? Listen in as Marshall Brain breaks down the science behind jet engines in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Does drinking ice water burn calories?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-18-brainstuff-ice-water-calories.mp3</link>
            <description>When you drink cold water, your body exerts an effort to warm up the liquid and, in doing so, burns calories. So does that make drinking ice water an effective weight loss strategy? Find out in this episode of BrainStuff.</description>
            <pubDate>Fri, 18 Jan 2013 15:52:08 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-18-brainstuff-ice-water-calories.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-18-brainstuff-ice-water-calories.mp3' length='1068565' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, ice water, burn calories, health, weight loss, diet</itunes:keywords>
            <itunes:duration>00:02:50</itunes:duration>
            <itunes:subtitle>When you drink cold water, your body exerts an effort to warm up the liquid and, in doing so, burns calories. So does that make drinking ice water an effective weight loss strategy? Find out in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a jet engine's afterburner work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-16-brainstuff-afterburner.mp3</link>
            <description>The afterburner on a jet engine adds thrust to the engine. Tune in as Marshall Brain explains how an afterburner works -- and the pros and cons of using one -- in this episode of BrainStuff.</description>
            <pubDate>Wed, 16 Jan 2013 12:18:43 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-16-brainstuff-afterburner.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-16-brainstuff-afterburner.mp3' length='1106802' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, afterburner, jet engine, engineering, fuel, aircraft, jet propulsion, physics</itunes:keywords>
            <itunes:duration>00:02:56</itunes:duration>
            <itunes:subtitle>The afterburner on a jet engine adds thrust to the engine. Tune in as Marshall Brain explains how an afterburner works -- and the pros and cons of using one -- in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is the problem with MTBE in gasoline?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-14-brainstuff-mtbe.mp3</link>
            <description>Some gasoline contains MTBE, or methyl tertiary butyl ether. Find out why MTBE is added to gasoline in the first place, and why it's no longer a popular additive, in this episode of BrainStuff.</description>
            <pubDate>Mon, 14 Jan 2013 14:21:44 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-14-brainstuff-mtbe.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-14-brainstuff-mtbe.mp3' length='1005074' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, mtbe, methyl tertiary butyl ether, gasoline, fuel, gas additive</itunes:keywords>
            <itunes:duration>00:02:40</itunes:duration>
            <itunes:subtitle>Some gasoline contains MTBE, or methyl tertiary butyl ether. Find out why MTBE is added to gasoline in the first place, and why it's no longer a popular additive, in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a magneto work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-11-brainstuff-magento.mp3</link>
            <description>A magneto is a kind of electrical generator used in small gasoline engines in lieu of a battery. Find out how magnetos work in this episode of BrainStuff.</description>
            <pubDate>Fri, 11 Jan 2013 13:35:50 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-11-brainstuff-magento.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, magneto, magnetic, electricity and magnetics, science, physics</itunes:keywords>
            <itunes:duration>00:04:08</itunes:duration>
            <itunes:subtitle>A magneto is a kind of electrical generator used in small gasoline engines in lieu of a battery. Find out how magnetos work in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why does a manual transmission make a whirring noise?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-09-brainstuff-manual-transmission-whir.mp3</link>
            <description>When manual transmissions are put in reverse, they produce a loud, whirring noise. What's the culprit? Gears. Marshall Brain explains how helical and spur gears work in manual transmissions in this episode.</description>
            <pubDate>Wed, 09 Jan 2013 13:56:15 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-09-brainstuff-manual-transmission-whir.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-09-brainstuff-manual-transmission-whir.mp3' length='1161510' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, manual transmission, automotive, engines, transmission, car car, auto, carstuff</itunes:keywords>
            <itunes:duration>00:03:06</itunes:duration>
            <itunes:subtitle>When manual transmissions are put in reverse, they produce a loud, whirring noise. What's the culprit? Gears. Marshall Brain explains how helical and spur gears work in manual transmissions in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is the Strategic Petroleum Reserve?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-07-brainstuff-petroleum-reserve.mp3</link>
            <description>The Strategic Petroleum Reserve is the world's largest emergency oil stockpile. But why do we have it? Where do we keep it? Find out why the United States created this reserve and where the oil is stored in this episode.</description>
            <pubDate>Mon, 07 Jan 2013 13:18:38 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-07-brainstuff-petroleum-reserve.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-07-brainstuff-petroleum-reserve.mp3' length='1179219' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, petroleum reserve, strategic petroleum reserve, oil, us oil, fossil fuels</itunes:keywords>
            <itunes:duration>00:03:09</itunes:duration>
            <itunes:subtitle>The Strategic Petroleum Reserve is the world's largest emergency oil stockpile. But why do we have it? Where do we keep it? Find out why the United States created this reserve and where the oil is stored in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does the Radio Data System work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-04-brainstuff-rds.mp3</link>
            <description>The Radio Data System, or RDS, allows your radio to display information like song titles and radio station call signs. Find out how the RDS works in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 04 Jan 2013 11:47:41 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-04-brainstuff-rds.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-04-brainstuff-rds.mp3' length='987989' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, radio data system, rds, song titles, audio visual technology, car radio</itunes:keywords>
            <itunes:duration>00:02:37</itunes:duration>
            <itunes:subtitle>The Radio Data System, or RDS, allows your radio to display information like song titles and radio station call signs. Find out how the RDS works in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can you measure the height of a tall tower?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-02-brainstuff-height-of-tower.mp3</link>
            <description>So which building really is the world's tallest? Why don't all the experts agree? In this episode of BrainStuff, Marshall reveals three common techniques for measuring the height of tall objects like towers.</description>
            <pubDate>Wed, 02 Jan 2013 14:05:20 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-02-brainstuff-height-of-tower.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2013-01-02-brainstuff-height-of-tower.mp3' length='1245986' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, world's tallest building, architecture, design, construction</itunes:keywords>
            <itunes:duration>00:03:20</itunes:duration>
            <itunes:subtitle>So which building really is the world's tallest? Why don't all the experts agree? In this episode of BrainStuff, Marshall reveals three common techniques for measuring the height of tall objects like towers.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do they get the lead in a wooden pencil?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-31-brainstuff-pencil.mp3</link>
            <description>Today's pencils are manufactured very differently than the original versions; but they still use a material called graphite, which isn't lead at all. How does the graphite get in the pencil? Find out in this episode.</description>
            <pubDate>Mon, 31 Dec 2012 12:31:57 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-31-brainstuff-pencil.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-31-brainstuff-pencil.mp3' length='1494715' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, pencil lead, writing, lead, graphite, manufacturing, everyday science</itunes:keywords>
            <itunes:duration>00:04:02</itunes:duration>
            <itunes:subtitle>Today's pencils are manufactured very differently than the original versions; but they still use a material called graphite, which isn't lead at all. How does the graphite get in the pencil? Find out in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is it possible to use a leaf blower as a supercharger?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-28-brainstuff-leafblower-supercharger.mp3</link>
            <description>Leaf blowers are convenient, but are they living up to their potential? In this podcast, Marshall examines superchargers, explaining how a leaf blower can (theoretically) perform the same duties. Tune in and learn more about hacking leaf blowers.</description>
            <pubDate>Thu, 27 Dec 2012 12:19:06 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-28-brainstuff-leafblower-supercharger.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-28-brainstuff-leafblower-supercharger.mp3' length='2890768' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, leafblower, supercharger, yardwork, engines, landscaping, lawn care</itunes:keywords>
            <itunes:duration>00:07:54</itunes:duration>
            <itunes:subtitle>Leaf blowers are convenient, but are they living up to their potential? In this podcast, Marshall examines superchargers, explaining how a leaf blower can (theoretically) perform the same duties. Tune in and learn more about hacking leaf blowers.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What are carbide tips?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-26-brainstuff-carbide-tips.mp3</link>
            <description>Many cutting tools are made of materials like steel but have carbide tips, which stay sharper longer. Learn more about carbide tips in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 26 Dec 2012 10:56:44 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-26-brainstuff-carbide-tips.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-26-brainstuff-carbide-tips.mp3' length='1025457' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, carbide, cutting cools, carbide tips, steel, cutting steel</itunes:keywords>
            <itunes:duration>00:02:43</itunes:duration>
            <itunes:subtitle>Many cutting tools are made of materials like steel but have carbide tips, which stay sharper longer. Learn more about carbide tips in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does high-speed rail work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-24-brainstuff-high-speed-rail.mp3</link>
            <description>Although it's common in some countries, high-speed rail service isn't available in the United States -- yet. Tune in to learn more about this swift rail service -- and how soon we're likely to have it in the U.S. -- in this episode.</description>
            <pubDate>Fri, 21 Dec 2012 12:39:29 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-24-brainstuff-high-speed-rail.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-24-brainstuff-high-speed-rail.mp3' length='2040788' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, high-speed rail, public transportation, swift rail, light rail, trains</itunes:keywords>
            <itunes:duration>00:05:32</itunes:duration>
            <itunes:subtitle>Although it's common in some countries, high-speed rail service isn't available in the United States -- yet. Tune in to learn more about this swift rail service -- and how soon we're likely to have it in the U.S. -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Will a really big earthquake sink Western California?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-21-brainstuff-fault-lines.mp3</link>
            <description>Given California's history of earthquakes and major fault lines, it's not surprising that people speculate about parts of California breaking off into the ocean. Fortunately, seismic forces don't work that way, as Marshall Brain explains in this episode.</description>
            <pubDate>Fri, 21 Dec 2012 12:07:15 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-21-brainstuff-fault-lines.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-21-brainstuff-fault-lines.mp3' length='1809286' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, fault lines, earthquakes, california, san andreas fault, plate tectonics, natural disaster</itunes:keywords>
            <itunes:duration>00:04:54</itunes:duration>
            <itunes:subtitle>Given California's history of earthquakes and major fault lines, it's not surprising that people speculate about parts of California breaking off into the ocean. Fortunately, seismic forces don't work that way, as Marshall Brain explains in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does residential real estate work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-19-brainstuff-real-estate.mp3</link>
            <description>There are many different types of residential real estate: traditional houses, condos, mobile homes, etc. But what's the difference between these types? Marshall Brain breaks it down for you in this episode of BrainStuff.</description>
            <pubDate>Wed, 19 Dec 2012 14:34:25 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-19-brainstuff-real-estate.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-19-brainstuff-real-estate.mp3' length='2166798' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, residential real estate, real estate, realty, realtor, condo, mobile home, housing</itunes:keywords>
            <itunes:duration>00:05:53</itunes:duration>
            <itunes:subtitle>There are many different types of residential real estate: traditional houses, condos, mobile homes, etc. But what's the difference between these types? Marshall Brain breaks it down for you in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do some engines use a dry sump oil system?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-17-brainstuff-dry-sump.mp3</link>
            <description>Most car engines use a wet sump oil system, but some rely on a dry sump system. Find out how a dry sump system works -- and why it's advantageous -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 17 Dec 2012 15:18:41 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-17-brainstuff-dry-sump.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-17-brainstuff-dry-sump.mp3' length='1123256' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, dry sump, engine, mechanic, car engine, automotive</itunes:keywords>
            <itunes:duration>00:03:00</itunes:duration>
            <itunes:subtitle>Most car engines use a wet sump oil system, but some rely on a dry sump system. Find out how a dry sump system works -- and why it's advantageous -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why can't we breathe underwater?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-14-brainstuff-water-oxygen.mp3</link>
            <description>Water is made up of hydrogen and oxygen, so why aren't we able to breathe underwater? Find out in this episode of BrainStuff.</description>
            <pubDate>Fri, 14 Dec 2012 13:57:23 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-14-brainstuff-water-oxygen.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-14-brainstuff-water-oxygen.mp3' length='1318865' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, breathe underwater, oxygen, air, respiration, biology, anatomy, gills, chemistry</itunes:keywords>
            <itunes:duration>00:03:32</itunes:duration>
            <itunes:subtitle>Water is made up of hydrogen and oxygen, so why aren't we able to breathe underwater? Find out in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is Windows Safe Mode?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-12-brainstuff-windows-safe-mode.mp3</link>
            <description>Safe Mode is a feature of the Windows operating system that allows users to load a limited version of the system in order to troubleshoot problems. Learn more about using Safe Mode in this episode.</description>
            <pubDate>Wed, 12 Dec 2012 12:55:12 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-12-brainstuff-windows-safe-mode.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-12-brainstuff-windows-safe-mode.mp3' length='1698795' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, windows safe mode, os, windows, virus, computer security, troubleshooting,</itunes:keywords>
            <itunes:duration>00:04:35</itunes:duration>
            <itunes:subtitle>Safe Mode is a feature of the Windows operating system that allows users to load a limited version of the system in order to troubleshoot problems. Learn more about using Safe Mode in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does the public option work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-10-brainstuff-public-option.mp3</link>
            <description>In the current U.S. debate over health care reform, a government-sponsored public option has been a controversial topic. Tune in to this episode of BrainStuff to hear Marshall Brain explain the nuances and implications of the public option.</description>
            <pubDate>Mon, 10 Dec 2012 17:17:11 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-10-brainstuff-public-option.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-10-brainstuff-public-option.mp3' length='1972449' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, public option, health insurance, legislation, healthcare</itunes:keywords>
            <itunes:duration>00:05:21</itunes:duration>
            <itunes:subtitle>In the current U.S. debate over health care reform, a government-sponsored public option has been a controversial topic. Tune in to this episode of BrainStuff to hear Marshall Brain explain the nuances and implications of the public option.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can the grass on a golf course green be so perfect?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-07-brainstuff-golf-green-final.mp3</link>
            <description>The greens on a golf course are famously smooth and perfect-looking, but how do they get that way? Discover how careful planning, the right ingredients and a whole lot of maintenance yield a flawless green in this episode of BrainStuff.</description>
            <pubDate>Fri, 07 Dec 2012 15:39:19 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-07-brainstuff-golf-green-final.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-07-brainstuff-golf-green-final.mp3' length='1064331' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, golf green, landscaping, lawn care, sports, lawn maintenance</itunes:keywords>
            <itunes:duration>00:02:50</itunes:duration>
            <itunes:subtitle>The greens on a golf course are famously smooth and perfect-looking, but how do they get that way? Discover how careful planning, the right ingredients and a whole lot of maintenance yield a flawless green in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How many people work at a Formula 1 pit stop?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-05-brainstuff-7-second-pit-stop.mp3</link>
            <description>If you've ever seen a Formula 1 race, then you know the race isn't just between cars -- it's also between pit stop crews. In seven seconds these crews perform an entire pit stop. But how does it work, and how many people does it take? Tune in to find out.</description>
            <pubDate>Wed, 05 Dec 2012 14:50:11 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-05-brainstuff-7-second-pit-stop.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-05-brainstuff-7-second-pit-stop.mp3' length='1325452' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, formula 1, racing, formula 1 pit stop, gas, race car, auto</itunes:keywords>
            <itunes:duration>00:03:33</itunes:duration>
            <itunes:subtitle>If you've ever seen a Formula 1 race, then you know the race isn't just between cars -- it's also between pit stop crews. In seven seconds these crews perform an entire pit stop. But how does it work, and how many people does it take? Tune in to find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What happens when pregnant women smoke cigarettes?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-03-brainstuff-baby-nicotine.mp3</link>
            <description>When pregnant women smoke, they expose their developing babies to a host of addictive, harmful chemicals. In this episode, Marshall Brain explains how nicotine and other compounds found in cigarettes affect developing fetuses.</description>
            <pubDate>Mon, 03 Dec 2012 18:23:04 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-03-brainstuff-baby-nicotine.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-12-03-brainstuff-baby-nicotine.mp3' length='1462905' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, pregnancy, smoke, cigarette, smoking during pregnancy, nicotine, health</itunes:keywords>
            <itunes:duration>00:03:56</itunes:duration>
            <itunes:subtitle>When pregnant women smoke, they expose their developing babies to a host of addictive, harmful chemicals. In this episode, Marshall Brain explains how nicotine and other compounds found in cigarettes affect developing fetuses.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do they add iodine to salt?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-30-brainstuff-iodine.mp3</link>
            <description>Table salt contains iodine to help prevent thyroid problems and iodine deficiencies. Find out how table salt keeps your thyroid happy -- and what iodine has to do with a nuclear attack -- in this episode of BrainStuff.</description>
            <pubDate>Fri, 30 Nov 2012 11:53:52 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-30-brainstuff-iodine.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-30-brainstuff-iodine.mp3' length='1195206' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, iodine, thyroid, health, chemistry, nacl, table salt, salt</itunes:keywords>
            <itunes:duration>00:03:12</itunes:duration>
            <itunes:subtitle>Table salt contains iodine to help prevent thyroid problems and iodine deficiencies. Find out how table salt keeps your thyroid happy -- and what iodine has to do with a nuclear attack -- in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do kosher foods work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-28-brainstuff-kosher.mp3</link>
            <description>In this episode of BrainStuff, Marshall Brain gives a detailed explanation of the Jewish dietary laws and preparations that make foods &quot;kosher&quot; and &quot;pareve.&quot;</description>
            <pubDate>Wed, 28 Nov 2012 17:04:00 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-28-brainstuff-kosher.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-28-brainstuff-kosher.mp3' length='1377477' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, kosher, food, diet, nutrition, judaism, religion, pareve, haram, halaal</itunes:keywords>
            <itunes:duration>00:03:42</itunes:duration>
            <itunes:subtitle>In this episode of BrainStuff, Marshall Brain gives a detailed explanation of the Jewish dietary laws and preparations that make foods &quot;kosher&quot; and &quot;pareve.&quot;</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do carbohydrates work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-26-brainstuff-carbohydrates.mp3</link>
            <description>We hear about carbohydrates in the news constantly -- the complex carbs are supposed to be better than the simple ones, but why? In fact, what exactly is a carbohydrate? Listen in and learn more in this podcast.</description>
            <pubDate>Mon, 26 Nov 2012 15:12:48 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-26-brainstuff-carbohydrates.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-26-brainstuff-carbohydrates.mp3' length='2326356' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, carbohydrate, nutrition, food, health, complex carb, carb</itunes:keywords>
            <itunes:duration>00:06:20</itunes:duration>
            <itunes:subtitle>We hear about carbohydrates in the news constantly -- the complex carbs are supposed to be better than the simple ones, but why? In fact, what exactly is a carbohydrate? Listen in and learn more in this podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Securing Your Wifi Router</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-23-brainstuff-wireless-password.mp3</link>
            <description>Is it possible to get arrested for downloading illegal material even if you never download it yourself? Yes: When someone else logs onto your unprotected wifi, they can make a clean getaway while you get stuck with the blame. Tune in to learn more.</description>
            <pubDate>Fri, 23 Nov 2012 13:42:23 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-23-brainstuff-wireless-password.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-23-brainstuff-wireless-password.mp3' length='2209906' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, wifi router, wireless password, pirate, illegal download</itunes:keywords>
            <itunes:duration>00:06:01</itunes:duration>
            <itunes:subtitle>Is it possible to get arrested for downloading illegal material even if you never download it yourself? Yes: When someone else logs onto your unprotected wifi, they can make a clean getaway while you get stuck with the blame. Tune in to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a CB radio antenna work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-21-brainstuff-cb-antenna.mp3</link>
            <description>A citizens band (CB) radio is often used by truck drivers to communicate while on the road, but how does it work? Marshall Brain gives a detailed explanation of how a CB radio's antenna works in this episode.</description>
            <pubDate>Wed, 21 Nov 2012 14:42:43 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-21-brainstuff-cb-antenna.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-21-brainstuff-cb-antenna.mp3' length='1802232' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, citizen's band, cb radio, communication, truckers, radio</itunes:keywords>
            <itunes:duration>00:04:53</itunes:duration>
            <itunes:subtitle>A citizens band (CB) radio is often used by truck drivers to communicate while on the road, but how does it work? Marshall Brain gives a detailed explanation of how a CB radio's antenna works in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do flies breathe?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-19-brainstuff-fly-respiration.mp3</link>
            <description>Insects like flies have a very different respiratory system than we do. Learn more about how flies and insects breathe in this episode.</description>
            <pubDate>Mon, 19 Nov 2012 15:36:01 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-19-brainstuff-fly-respiration.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-19-brainstuff-fly-respiration.mp3' length='1081415' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, flies, fly, insect biology, how do flies breathe, insect respiration</itunes:keywords>
            <itunes:duration>00:02:52</itunes:duration>
            <itunes:subtitle>Insects like flies have a very different respiratory system than we do. Learn more about how flies and insects breathe in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is an Omega-3 fatty acid?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-16-brainstuff-omega-3.mp3</link>
            <description>Omega-3 fatty acids are essential to the human body. Tune in to hear Marshall Brain explain the chemistry of fat molecules and fatty acids, Omega-3s in particular, in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 16 Nov 2012 14:26:47 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-16-brainstuff-omega-3.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-16-brainstuff-omega-3.mp3' length='2361772' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, omega 3, nutrition, chemistry, fat</itunes:keywords>
            <itunes:duration>00:06:36</itunes:duration>
            <itunes:subtitle>Omega-3 fatty acids are essential to the human body. Tune in to hear Marshall Brain explain the chemistry of fat molecules and fatty acids, Omega-3s in particular, in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What does RSVP mean?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-14-brainstuff-rsvp.mp3</link>
            <description>Most people are familiar with the concept of replying to a party invitation via R.S.V.P., but what exactly do those letters represent? Learn more about the origins and practices of etiquette in this episode of BrainStuff.</description>
            <pubDate>Wed, 14 Nov 2012 12:49:07 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-14-brainstuff-rsvp.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-14-brainstuff-rsvp.mp3' length='1404904' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, rsvp, etiquette, manners, behavior, etymology, parties</itunes:keywords>
            <itunes:duration>00:03:47</itunes:duration>
            <itunes:subtitle>Most people are familiar with the concept of replying to a party invitation via R.S.V.P., but what exactly do those letters represent? Learn more about the origins and practices of etiquette in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is there a way to compare a human being to an engine?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-12-brainstuff-human-effciency.mp3</link>
            <description>Human muscles are essentially biological engines. In terms of efficiency, biological engines are amazing. Listen in as Marshall Brain calculates human efficiency in this episode.</description>
            <pubDate>Mon, 12 Nov 2012 14:21:22 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-12-brainstuff-human-effciency.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-12-brainstuff-human-effciency.mp3' length='1131726' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, human muscle, anatomy, energy, human energy, muscle energy</itunes:keywords>
            <itunes:duration>00:03:01</itunes:duration>
            <itunes:subtitle>Human muscles are essentially biological engines. In terms of efficiency, biological engines are amazing. Listen in as Marshall Brain calculates human efficiency in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a rice krispy?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-09-brainstuff-rice-krispy.mp3</link>
            <description>Like many cereals, rice krispies are made by puffing grains -- in this case, rice. Find out how rice krispies and other puffed cereals are manufactured in this episode of BrainStuff.</description>
            <pubDate>Fri, 09 Nov 2012 12:22:25 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-09-brainstuff-rice-krispy.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-09-brainstuff-rice-krispy.mp3' length='1179370' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, rice krispy, food, baking, sweets, food chemistry, cooking, puffed rice</itunes:keywords>
            <itunes:duration>00:03:09</itunes:duration>
            <itunes:subtitle>Like many cereals, rice krispies are made by puffing grains -- in this case, rice. Find out how rice krispies and other puffed cereals are manufactured in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a blowout preventer?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-07-brainstuff-blowout-preventers.mp3</link>
            <description>The massive oil spill that flooded the Gulf of Mexico should have been prevented by a fail-safe device called a Blowout Preventer, or BOP. Find out how this safety mechanism is supposed to work -- and why it didn't -- in this episode.</description>
            <pubDate>Wed, 07 Nov 2012 15:23:45 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-07-brainstuff-blowout-preventers.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-07-brainstuff-blowout-preventers.mp3' length='1943145' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, oil spill, blow out preventer, oil drilling, gulf of mexico</itunes:keywords>
            <itunes:duration>00:05:16</itunes:duration>
            <itunes:subtitle>The massive oil spill that flooded the Gulf of Mexico should have been prevented by a fail-safe device called a Blowout Preventer, or BOP. Find out how this safety mechanism is supposed to work -- and why it didn't -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What makes glass transparent?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-05-brainstuff-glass.mp3</link>
            <description>The transparency of materials has to do with their molecular state. Discover how silica and heat produce the transparent material we call glass in this episode of BrainStuff.</description>
            <pubDate>Mon, 05 Nov 2012 15:49:56 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-05-brainstuff-glass.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-05-brainstuff-glass.mp3' length='1445029' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall,  glass, silica, making glass, how glass work</itunes:keywords>
            <itunes:duration>00:03:53</itunes:duration>
            <itunes:subtitle>The transparency of materials has to do with their molecular state. Discover how silica and heat produce the transparent material we call glass in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Does Yawning Work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-02-brainstuff-yawn.mp3</link>
            <description>Just hearing about yawning can make you yawn, and no one is sure why. Learn more about yawns and yawning in this HowStuffWorks podcast.</description>
            <pubDate>Fri, 02 Nov 2012 15:01:53 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-02-brainstuff-yawn.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-11-02-brainstuff-yawn.mp3' length='1651134' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, yawn, human behavior, energy, sleep, contagious yawn</itunes:keywords>
            <itunes:duration>00:04:27</itunes:duration>
            <itunes:subtitle>Just hearing about yawning can make you yawn, and no one is sure why. Learn more about yawns and yawning in this HowStuffWorks podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why are my power bills so high?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-31-brainstuff-power.mp3</link>
            <description>When it comes to energy usage, heating and cooling appliances contribute the most to your power bill. Tune in to find out which appliances are the most power-hungry -- and why -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 31 Oct 2012 12:40:04 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-31-brainstuff-power.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-31-brainstuff-power.mp3' length='1252872' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, power bill, utilities, electricity, home expenses, finance</itunes:keywords>
            <itunes:duration>00:03:21</itunes:duration>
            <itunes:subtitle>When it comes to energy usage, heating and cooling appliances contribute the most to your power bill. Tune in to find out which appliances are the most power-hungry -- and why -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Tiny Houses</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-29-brainstuff-tiny-house.mp3</link>
            <description>Tiny houses are part of a growing trend, but why would someone want an itty bitty house? In this episode, Marshall talks about the benefits and challenges of building a tiny home.</description>
            <pubDate>Mon, 29 Oct 2012 18:59:30 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-29-brainstuff-tiny-house.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-29-brainstuff-tiny-house.mp3' length='1465253' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, tiny houses, architecture, design, housing</itunes:keywords>
            <itunes:duration>00:03:56</itunes:duration>
            <itunes:subtitle>Tiny houses are part of a growing trend, but why would someone want an itty bitty house? In this episode, Marshall talks about the benefits and challenges of building a tiny home.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Can cans and string really be used like a telephone?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-26-brainstuff-cans-and-string.mp3</link>
            <description>You've probably heard of this trick before: Connecting two cans with a piece of string in the bottom of each can will supposedly allow people to speak over a distance to one another. Tune in as Marshall Brain explains how it works in this episode.</description>
            <pubDate>Fri, 26 Oct 2012 16:54:03 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-26-brainstuff-cans-and-string.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-26-brainstuff-cans-and-string.mp3' length='1356797' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, can and string, communication, science, telephone</itunes:keywords>
            <itunes:duration>00:03:38</itunes:duration>
            <itunes:subtitle>You've probably heard of this trick before: Connecting two cans with a piece of string in the bottom of each can will supposedly allow people to speak over a distance to one another. Tune in as Marshall Brain explains how it works in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does gravity work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-24-brainstuff-gravity.mp3</link>
            <description>Gravity affects us every single day, but how does this oh-so-common force of nature work? Tune in to this podcast from HowStuffWorks.com to take a look at the nuts and bolts of gravity.</description>
            <pubDate>Wed, 24 Oct 2012 15:20:08 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-24-brainstuff-gravity.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-24-brainstuff-gravity.mp3' length='1152564' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, gravity, physics, time and space, gravitational force, g force</itunes:keywords>
            <itunes:duration>00:03:04</itunes:duration>
            <itunes:subtitle>Gravity affects us every single day, but how does this oh-so-common force of nature work? Tune in to this podcast from HowStuffWorks.com to take a look at the nuts and bolts of gravity.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is there a small hole on the top of spray can lids?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-22-brainstuff-spray-can-lid.mp3</link>
            <description>Many spray can lids have a tiny hole at the top. Check out this HowStuffWorks podcast to learn more about spray cans, shipping and air pressure.</description>
            <pubDate>Mon, 22 Oct 2012 17:47:25 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-22-brainstuff-spray-can-lid.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-22-brainstuff-spray-can-lid.mp3' length='737537' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, spray can lid, propellant, air pressure</itunes:keywords>
            <itunes:duration>00:01:55</itunes:duration>
            <itunes:subtitle>Many spray can lids have a tiny hole at the top. Check out this HowStuffWorks podcast to learn more about spray cans, shipping and air pressure.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Sea Monkeys Work</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-19-brainstuff-sea-monkeys.mp3</link>
            <description>Sea Monkeys are a type of brine shrimp. These shrimp create remarkably resilient eggs called cysts. Check out this HowStuffWorks podcast and learn more about the secret behind Sea Monkeys.</description>
            <pubDate>Fri, 19 Oct 2012 13:37:55 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-19-brainstuff-sea-monkeys.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-19-brainstuff-sea-monkeys.mp3' length='711360' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, sea monkeys, novelty toys, shrimp, sea monkey eggs, egg cysts, hobbies</itunes:keywords>
            <itunes:duration>00:01:51</itunes:duration>
            <itunes:subtitle>Sea Monkeys are a type of brine shrimp. These shrimp create remarkably resilient eggs called cysts. Check out this HowStuffWorks podcast and learn more about the secret behind Sea Monkeys.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a Nor’easter?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-17-brainstuff-noreaster.mp3</link>
            <description>Nor'easters are storm systems that frequently occur in the eastern United States during winter. In this episode, Marshall explains where Nor'easters get their name, how they work and why some Nor'easters are more powerful than others.</description>
            <pubDate>Wed, 17 Oct 2012 14:54:45 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-17-brainstuff-noreaster.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-17-brainstuff-noreaster.mp3' length='1288612' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, no'easter, storm, weather, eastern US weather, climate</itunes:keywords>
            <itunes:duration>00:03:27</itunes:duration>
            <itunes:subtitle>Nor'easters are storm systems that frequently occur in the eastern United States during winter. In this episode, Marshall explains where Nor'easters get their name, how they work and why some Nor'easters are more powerful than others.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is the heat index?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-15-brainstuff-heat-index.mp3</link>
            <description>Your body has efficient ways to release excess heat, but high temperatures and high humidity create a sticky situation. Find out how the heat index keeps you abreast of dangerous heat situations in this HowStuffWorks podcast.</description>
            <pubDate>Mon, 15 Oct 2012 16:33:21 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-15-brainstuff-heat-index.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-15-brainstuff-heat-index.mp3' length='1094105' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, excess heat, heat index, weather, climate, health</itunes:keywords>
            <itunes:duration>00:02:54</itunes:duration>
            <itunes:subtitle>Your body has efficient ways to release excess heat, but high temperatures and high humidity create a sticky situation. Find out how the heat index keeps you abreast of dangerous heat situations in this HowStuffWorks podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How gas pumps work</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-12-brainstuff-gas-pump.mp3</link>
            <description>Using a gas pump is pretty simple: You just push a few buttons and fuel up. But how do they actually work? Listen in and learn more about gas pumps.</description>
            <pubDate>Fri, 12 Oct 2012 16:53:04 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-12-brainstuff-gas-pump.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-12-brainstuff-gas-pump.mp3' length='866054' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, gas pump, octane, fuel, automobile,</itunes:keywords>
            <itunes:duration>00:02:17</itunes:duration>
            <itunes:subtitle>Using a gas pump is pretty simple: You just push a few buttons and fuel up. But how do they actually work? Listen in and learn more about gas pumps.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>how do I know if my catalytic converter has failed?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-10-brainstuff-failed-catalytic-converter.mp3</link>
            <description>An automobile's catalytic converter uses a catalyst to convert harmful exhaust fumes into harmless ones. Find out what happens when your catalytic converter stops working properly -- and how you can tell -- in this episode.</description>
            <pubDate>Wed, 10 Oct 2012 11:44:08 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-10-brainstuff-failed-catalytic-converter.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-10-brainstuff-failed-catalytic-converter.mp3' length='1226405' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, catalytic convertor, automotive, auto, car repair</itunes:keywords>
            <itunes:duration>00:03:17</itunes:duration>
            <itunes:subtitle>An automobile's catalytic converter uses a catalyst to convert harmful exhaust fumes into harmless ones. Find out what happens when your catalytic converter stops working properly -- and how you can tell -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is carbon monoxide so poisonous?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-08-brainstuff-carbon-monoxide.mp3</link>
            <description>The structure of hemoglobin causes oxygen to bind loosely to iron -- however, carbon monoxide binds very tightly to the blood's iron, reducing your ability to breathe. Check out this podcast from HowStuffWorks to learn more.</description>
            <pubDate>Mon, 08 Oct 2012 15:59:19 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-08-brainstuff-carbon-monoxide.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-08-brainstuff-carbon-monoxide.mp3' length='917470' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, carbon monoxide, gas, hemoglobin, poison, health</itunes:keywords>
            <itunes:duration>00:02:25</itunes:duration>
            <itunes:subtitle>The structure of hemoglobin causes oxygen to bind loosely to iron -- however, carbon monoxide binds very tightly to the blood's iron, reducing your ability to breathe. Check out this podcast from HowStuffWorks to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do scratch-and-sniff stickers work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-05-brainstuff-scratch-and-sniff.mp3</link>
            <description>Scratch-and-sniff stickers are novelties that delight both children and adults. Sniff out the ingenious technology that makes them work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 05 Oct 2012 14:01:16 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-05-brainstuff-scratch-and-sniff.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-05-brainstuff-scratch-and-sniff.mp3' length='928914' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, scratch and sniff, snickers, technology, odor, smell</itunes:keywords>
            <itunes:duration>00:02:27</itunes:duration>
            <itunes:subtitle>Scratch-and-sniff stickers are novelties that delight both children and adults. Sniff out the ingenious technology that makes them work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a funicular railway?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-03-brainstuff-funicular.mp3</link>
            <description>A funicular railway combines the technology of an elevator and a train. But how do they actually work? Learn more about these fascinating railways -- and how old they are -- in this episode.</description>
            <pubDate>Wed, 03 Oct 2012 12:01:29 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-03-brainstuff-funicular.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-03-brainstuff-funicular.mp3' length='1512429' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, funicular railway, technology, transit, transportation,</itunes:keywords>
            <itunes:duration>00:04:05</itunes:duration>
            <itunes:subtitle>A funicular railway combines the technology of an elevator and a train. But how do they actually work? Learn more about these fascinating railways -- and how old they are -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why doesn’t the vacuum of space suck away Earth’s atmosphere?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-01-brainstuff-vacuum.mp3</link>
            <description>It's often said that &quot;nature abhors a vacuum.&quot; If that's true, then why doesn't the vacuum of space suck away our atmosphere? Tune in as Marshall Brain explains the science behind vacuums in this HowStuffWorks podcast.</description>
            <pubDate>Mon, 01 Oct 2012 16:22:39 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-01-brainstuff-vacuum.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-10-01-brainstuff-vacuum.mp3' length='1267450' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, vaccuum, space, earth, atmosphere, outer space, gravity,</itunes:keywords>
            <itunes:duration>00:03:23</itunes:duration>
            <itunes:subtitle>It's often said that &quot;nature abhors a vacuum.&quot; If that's true, then why doesn't the vacuum of space suck away our atmosphere? Tune in as Marshall Brain explains the science behind vacuums in this HowStuffWorks podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Replacing Toilets Work</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-28-brainstuff-replace-toilets.mp3</link>
            <description>A family of four can consume more than 300 gallons of water per day. Old toilets use 5 gallons per flush, and this water use quickly adds up. Check out this HowStuffWorks podcast and learn why cities across the US are replacing their old commodes.</description>
            <pubDate>Fri, 28 Sep 2012 13:05:54 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-28-brainstuff-replace-toilets.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-28-brainstuff-replace-toilets.mp3' length='667801' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, replace toilet, home repair, diy, plumbing, toilet replacement</itunes:keywords>
            <itunes:duration>00:01:43</itunes:duration>
            <itunes:subtitle>A family of four can consume more than 300 gallons of water per day. Old toilets use 5 gallons per flush, and this water use quickly adds up. Check out this HowStuffWorks podcast and learn why cities across the US are replacing their old commodes.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a stratospheric aerosol?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-26-brainstuff-stratispheric-aerosols.mp3</link>
            <description>Stratospheric aerosols have been proposed as a new way to combat global warming -- but what's the science behind this proposal? Discover how stratospheric aerosols would work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 26 Sep 2012 14:44:25 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-26-brainstuff-stratispheric-aerosols.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-26-brainstuff-stratispheric-aerosols.mp3' length='775797' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, stratospheric aerosols, global warming, environmentalism,</itunes:keywords>
            <itunes:duration>00:02:01</itunes:duration>
            <itunes:subtitle>Stratospheric aerosols have been proposed as a new way to combat global warming -- but what's the science behind this proposal? Discover how stratospheric aerosols would work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How are LCD screens backlit?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-24-brainstuff-lcd-backlight.mp3</link>
            <description>In this episode, Marshall explains the two technologies that are used to backlight LCD panels. Tune in to learn more about the science behind LCD panels.</description>
            <pubDate>Mon, 24 Sep 2012 14:13:13 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-24-brainstuff-lcd-backlight.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-24-brainstuff-lcd-backlight.mp3' length='1527028' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, lcd backlight, liquid crystal display, television, tech</itunes:keywords>
            <itunes:duration>00:04:07</itunes:duration>
            <itunes:subtitle>In this episode, Marshall explains the two technologies that are used to backlight LCD panels. Tune in to learn more about the science behind LCD panels.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What do those plastic recycling symbols mean?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-21-brainstuff-plastic-recycling.mp3</link>
            <description>A typical recycling symbol on plastic looks like a triangle made of arrows. There are seven different types of plastic indicated by the symbols. Check out this HowStuffWorks podcast to learn the difference between each of these plastic types.</description>
            <pubDate>Fri, 21 Sep 2012 13:10:22 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-21-brainstuff-plastic-recycling.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-21-brainstuff-plastic-recycling.mp3' length='957309' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, plastic, recycling, recycling plastic, chemisty, recycling symbol, green</itunes:keywords>
            <itunes:duration>00:02:32</itunes:duration>
            <itunes:subtitle>A typical recycling symbol on plastic looks like a triangle made of arrows. There are seven different types of plastic indicated by the symbols. Check out this HowStuffWorks podcast to learn the difference between each of these plastic types.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>how does a direct-injection 2-stroke engine work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-19-brainstuff-direct-injection-2-stroke.mp3</link>
            <description>In a previous episode, Marshall explained how 4-stroke, direct-injection engines work. In this one, he takes a look at 2-stroke engines that utilize direct injection technology.</description>
            <pubDate>Wed, 19 Sep 2012 12:20:25 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-19-brainstuff-direct-injection-2-stroke.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-19-brainstuff-direct-injection-2-stroke.mp3' length='1957437' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, 4-stroke, direct-injection engine, 2-stroke engine, auto</itunes:keywords>
            <itunes:duration>00:05:19</itunes:duration>
            <itunes:subtitle>In a previous episode, Marshall explained how 4-stroke, direct-injection engines work. In this one, he takes a look at 2-stroke engines that utilize direct injection technology.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a Fresnel lens work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-17-brainstuff-fresnel-lens.mp3</link>
            <description>The thin piece of plastic called a Fresnel lens solves some of the problems inherent in traditional magnifying lenses. Learn more about the benefits and weaknesses of Fresnel lenses in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 17 Sep 2012 14:51:00 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-17-brainstuff-fresnel-lens.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-17-brainstuff-fresnel-lens.mp3' length='780182' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, fresnel lens, magnifying lens, lens, optics</itunes:keywords>
            <itunes:duration>00:02:03</itunes:duration>
            <itunes:subtitle>The thin piece of plastic called a Fresnel lens solves some of the problems inherent in traditional magnifying lenses. Learn more about the benefits and weaknesses of Fresnel lenses in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do gasoline direct injection engines work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-14-brainstuff-gasoline-direct-injection.mp3</link>
            <description>The latest improvement on the internal combustion engine is called gasoline direct injection. In this episode, Marshall explains how gasoline direct injection technology works -- and how soon we'll see it in production vehicles.</description>
            <pubDate>Fri, 14 Sep 2012 14:57:30 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-14-brainstuff-gasoline-direct-injection.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-14-brainstuff-gasoline-direct-injection.mp3' length='1956807' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, direct injection, gasoline, gas, engine,</itunes:keywords>
            <itunes:duration>00:05:19</itunes:duration>
            <itunes:subtitle>The latest improvement on the internal combustion engine is called gasoline direct injection. In this episode, Marshall explains how gasoline direct injection technology works -- and how soon we'll see it in production vehicles.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Botulism Works</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-12-brainstuff-botulism.mp3</link>
            <description>Botulism bacteria creates a type of poisoning and paralysis -- but how does it actually work? Check out this HowStuffWorks podcast to learn more about the effects and spread of botulism.</description>
            <pubDate>Wed, 12 Sep 2012 11:54:03 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-12-brainstuff-botulism.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-12-brainstuff-botulism.mp3' length='893804' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, botulism, bacteria, disease, poison, paralysis</itunes:keywords>
            <itunes:duration>00:02:21</itunes:duration>
            <itunes:subtitle>Botulism bacteria creates a type of poisoning and paralysis -- but how does it actually work? Check out this HowStuffWorks podcast to learn more about the effects and spread of botulism.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do sodium acetate heat pads work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-10-brainstuff-sodium-acetate-heat-pad.mp3</link>
            <description>Sodium acetate heat pads start out as a pouch of liquid and crystallize into a warm solid. Explore the fascinating chemistry that makes these heat pads work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 10 Sep 2012 14:32:01 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-10-brainstuff-sodium-acetate-heat-pad.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-10-brainstuff-sodium-acetate-heat-pad.mp3' length='886927' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, sodium acetate, chemistry, heat pad,</itunes:keywords>
            <itunes:duration>00:02:20</itunes:duration>
            <itunes:subtitle>Sodium acetate heat pads start out as a pouch of liquid and crystallize into a warm solid. Explore the fascinating chemistry that makes these heat pads work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What causes poison ivy blisters?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-07-brainstuff-poison-ivy.mp3</link>
            <description>When people get a rash from poison ivy, their bodies are reacting to a chemical called urushiol. Check out this HowStuffWorks podcast to learn more about poison ivy rashes.</description>
            <pubDate>Fri, 07 Sep 2012 13:38:55 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-07-brainstuff-poison-ivy.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-07-brainstuff-poison-ivy.mp3' length='877674' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, poison ivy, rash, allergy, blisters, botany, urushiol</itunes:keywords>
            <itunes:duration>00:02:19</itunes:duration>
            <itunes:subtitle>When people get a rash from poison ivy, their bodies are reacting to a chemical called urushiol. Check out this HowStuffWorks podcast to learn more about poison ivy rashes.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>﻿﻿What is an MRE?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-05-brainstuff-mre.mp3</link>
            <description>An MRE -- or meal ready to eat -- contains precooked, sterilized food originally made to nourish soldiers. Check out this HowStuffWorks podcast to learn more about the retort packaging that makes MREs possible.</description>
            <pubDate>Wed, 05 Sep 2012 14:48:39 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-05-brainstuff-mre.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-05-brainstuff-mre.mp3' length='567165' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, mre, meal-ready-to-eat, prepackaged food, military food</itunes:keywords>
            <itunes:duration>00:01:27</itunes:duration>
            <itunes:subtitle>An MRE -- or meal ready to eat -- contains precooked, sterilized food originally made to nourish soldiers. Check out this HowStuffWorks podcast to learn more about the retort packaging that makes MREs possible.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Where did the potato chip come from?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-03-brainstuff-potato-chips.mp3</link>
            <description>Potato chips were invented in 1853 by an American cook named George Crum, and they've been a popular food item ever since. Learn more about George Crum and the evolution of the potato chip in this episode of BrainStuff.</description>
            <pubDate>Mon, 03 Sep 2012 10:44:43 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-03-brainstuff-potato-chips.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-09-03-brainstuff-potato-chips.mp3' length='1374841' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, george crum, potato chips, junk food, invention, history, food</itunes:keywords>
            <itunes:duration>00:03:42</itunes:duration>
            <itunes:subtitle>Potato chips were invented in 1853 by an American cook named George Crum, and they've been a popular food item ever since. Learn more about George Crum and the evolution of the potato chip in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What makes your arms, legs and feet fall asleep?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-31-brainstuff-falling-asleep.mp3</link>
            <description>When you put prolonged pressure on your feet, arms or legs, you temporarily cut off or scramble communications between your brain and your body parts. Marshall explains exactly what happens when body parts &quot;fall sleep&quot; in this episode.</description>
            <pubDate>Fri, 31 Aug 2012 13:33:33 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-31-brainstuff-falling-asleep.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-31-brainstuff-falling-asleep.mp3' length='1282513' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, arms and legs fall asleep, anatomy, circulation, science</itunes:keywords>
            <itunes:duration>00:03:26</itunes:duration>
            <itunes:subtitle>When you put prolonged pressure on your feet, arms or legs, you temporarily cut off or scramble communications between your brain and your body parts. Marshall explains exactly what happens when body parts &quot;fall sleep&quot; in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do airport scanners work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-29-brainstuff-tsa-scanners.mp3</link>
            <description>The new full-body scanners used at airports in the United States have caused a huge controversy -- but how do they work? In this episode, Marshall breaks down the science behind full-body scanners, along with the uproar they've caused.</description>
            <pubDate>Wed, 29 Aug 2012 14:16:02 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-29-brainstuff-tsa-scanners.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-29-brainstuff-tsa-scanners.mp3' length='2866474' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, tsa, body scanner, airport security, full-body scanner</itunes:keywords>
            <itunes:duration>00:07:50</itunes:duration>
            <itunes:subtitle>The new full-body scanners used at airports in the United States have caused a huge controversy -- but how do they work? In this episode, Marshall breaks down the science behind full-body scanners, along with the uproar they've caused.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is the Nissan Leaf such a big deal?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-27-brainstuff-nissan-leaf.mp3</link>
            <description>Nissan recently released the Leaf, a model which may be the first viable electric car to come on the market. How does it work? Why do people have high hopes for it? Tune in to this podcast from HowStuffWorks.com to find out more about the Nissan Leaf.</description>
            <pubDate>Mon, 27 Aug 2012 10:57:56 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-27-brainstuff-nissan-leaf.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-27-brainstuff-nissan-leaf.mp3' length='1993006' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, nissan leaf, electric vehicle, alternative fuel, electric car</itunes:keywords>
            <itunes:duration>00:05:25</itunes:duration>
            <itunes:subtitle>Nissan recently released the Leaf, a model which may be the first viable electric car to come on the market. How does it work? Why do people have high hopes for it? Tune in to this podcast from HowStuffWorks.com to find out more about the Nissan Leaf.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can some eggs be better for you than others?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-24-brainstuff-special-eggs.mp3</link>
            <description>If you've been to the grocery store recently, you know that eggs come in many varieties, some claiming to be better for you than others. What differentiates a normal egg from a &quot;special&quot; one? Find out in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 24 Aug 2012 12:45:23 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-24-brainstuff-special-eggs.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-24-brainstuff-special-eggs.mp3' length='867503' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, eggs, nutrition, special eggs, food, organic, free range</itunes:keywords>
            <itunes:duration>00:02:17</itunes:duration>
            <itunes:subtitle>If you've been to the grocery store recently, you know that eggs come in many varieties, some claiming to be better for you than others. What differentiates a normal egg from a &quot;special&quot; one? Find out in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do honeybees make honey?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-22-brainstuff-honey.mp3</link>
            <description>When it comes to making honey, bees are skilled chemists. Discover how they use enzymes to turn sugary flower nectar into a sweet, stable food source in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 22 Aug 2012 13:59:16 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-22-brainstuff-honey.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-22-brainstuff-honey.mp3' length='735826' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, honey, bee, beehive, enzyme, sugar, food, pollen</itunes:keywords>
            <itunes:duration>00:01:55</itunes:duration>
            <itunes:subtitle>When it comes to making honey, bees are skilled chemists. Discover how they use enzymes to turn sugary flower nectar into a sweet, stable food source in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Marshmallows Work</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-20-brainstuff-marshmallow.mp3</link>
            <description>Marshmallows are an old candy -- they've been around since the 1800s. The name marshmallow comes from the original recipe, which called for sap from the marshmallow plant. Check out this HowStuffWorks to learn more about the history of marshmallows.</description>
            <pubDate>Mon, 20 Aug 2012 13:05:57 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-20-brainstuff-marshmallow.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-20-brainstuff-marshmallow.mp3' length='610587' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, marshmallow, dessert, candy, sweets, history, cooking</itunes:keywords>
            <itunes:duration>00:01:34</itunes:duration>
            <itunes:subtitle>Marshmallows are an old candy -- they've been around since the 1800s. The name marshmallow comes from the original recipe, which called for sap from the marshmallow plant. Check out this HowStuffWorks to learn more about the history of marshmallows.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do self-cleaning ovens work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-17-brainstuff-self-cleaning-oven.mp3</link>
            <description>What does it take for an oven to clean itself? A whole lot of heat! Marshall Brain explains how these special ovens use intense temperatures to burn off baking spills and debris in this episode.</description>
            <pubDate>Fri, 17 Aug 2012 13:30:42 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-17-brainstuff-self-cleaning-oven.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-17-brainstuff-self-cleaning-oven.mp3' length='900714' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, self-cleaning oven, home appliance</itunes:keywords>
            <itunes:duration>00:02:23</itunes:duration>
            <itunes:subtitle>What does it take for an oven to clean itself? A whole lot of heat! Marshall Brain explains how these special ovens use intense temperatures to burn off baking spills and debris in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why does hydrogen peroxide foam when you put it on a cut?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-15-brainstuff-h2o2.mp3</link>
            <description>Hydrogen peroxide's foaming action is due to the catalase in blood and cells. Check out this HowStuffWorks podcast to learn how hydrogen peroxide interacts with catalase.</description>
            <pubDate>Wed, 15 Aug 2012 10:14:47 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-15-brainstuff-h2o2.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-15-brainstuff-h2o2.mp3' length='695260' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, h2o2, hydrogen peroxide, catalase, chemistry</itunes:keywords>
            <itunes:duration>00:01:48</itunes:duration>
            <itunes:subtitle>Hydrogen peroxide's foaming action is due to the catalase in blood and cells. Check out this HowStuffWorks podcast to learn how hydrogen peroxide interacts with catalase.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How big is the universe?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-13-brainstuff-mass-of-universe.mp3</link>
            <description>If all the matter in the universe was pushed into one corner, how much space would it take up? Listen in as Marshall Brain explores the size of the universe in this podcast from HowStuffWorks.</description>
            <pubDate>Mon, 13 Aug 2012 12:19:56 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-13-brainstuff-mass-of-universe.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-13-brainstuff-mass-of-universe.mp3' length='809330' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, mass of universe, astronomy, space, size of universe</itunes:keywords>
            <itunes:duration>00:02:07</itunes:duration>
            <itunes:subtitle>If all the matter in the universe was pushed into one corner, how much space would it take up? Listen in as Marshall Brain explores the size of the universe in this podcast from HowStuffWorks.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What are MP3 files and how do they work</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-10-brainstuff-mp3.mp3</link>
            <description>CDs store music using 44,100 16-bit digital samples per second, adding up to about 10 megabytes per minute -- and that's too large to move easily move across the internet. Check out this HowStuffWorks podcast to learn how MP3 files solve this problem.</description>
            <pubDate>Fri, 10 Aug 2012 15:41:07 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-10-brainstuff-mp3.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-10-brainstuff-mp3.mp3' length='809816' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, mp3, recording, audio, audio files,</itunes:keywords>
            <itunes:duration>00:02:07</itunes:duration>
            <itunes:subtitle>CDs store music using 44,100 16-bit digital samples per second, adding up to about 10 megabytes per minute -- and that's too large to move easily move across the internet. Check out this HowStuffWorks podcast to learn how MP3 files solve this problem.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do smoke detectors intercommunicate?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-08-brainstuff-fire-alarm-intercommunicate.mp3</link>
            <description>Some AC-powered smoke detectors are wired to communicate with each other. So when one unit is triggered, all of the units go off. Find out how this intercommunication works in this episode.</description>
            <pubDate>Wed, 08 Aug 2012 12:07:46 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-08-brainstuff-fire-alarm-intercommunicate.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-08-brainstuff-fire-alarm-intercommunicate.mp3' length='763580' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, smoke detector, ac-powered, smoke detector intercommunication</itunes:keywords>
            <itunes:duration>00:02:00</itunes:duration>
            <itunes:subtitle>Some AC-powered smoke detectors are wired to communicate with each other. So when one unit is triggered, all of the units go off. Find out how this intercommunication works in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does safety glass work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-06-brainstuff-safety-glass.mp3</link>
            <description>Laminated safety glass has been around since the 1920s. Find out how safety glass is made, how it works and what it's used for in this episode of BrainStuff.</description>
            <pubDate>Mon, 06 Aug 2012 11:46:25 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-06-brainstuff-safety-glass.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-06-brainstuff-safety-glass.mp3' length='1182988' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, safety glass, glass,</itunes:keywords>
            <itunes:duration>00:03:10</itunes:duration>
            <itunes:subtitle>Laminated safety glass has been around since the 1920s. Find out how safety glass is made, how it works and what it's used for in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do people choke under pressure?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-03-brainstuff-choke-pressure.mp3</link>
            <description>Anyone who watched the Master's tournament knows that Rory McElroy famously choked under pressure -- but what exactly happened? In this podcast, Marshall explores the science behind choking in stressful or intimidating situations</description>
            <pubDate>Fri, 03 Aug 2012 13:43:27 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-03-brainstuff-choke-pressure.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-03-brainstuff-choke-pressure.mp3' length='2596900' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, choke, pressure, stress, anxiety, psychology, emotion</itunes:keywords>
            <itunes:duration>00:07:05</itunes:duration>
            <itunes:subtitle>Anyone who watched the Master's tournament knows that Rory McElroy famously choked under pressure -- but what exactly happened? In this podcast, Marshall explores the science behind choking in stressful or intimidating situations</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is it possible to rescue water-soaked electronics?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-01-brainstuff-electronics-in-water.mp3</link>
            <description>Is it possible to rescue an electronic device dunked in water? In this episode, Marshall recounts an unfortunate meeting between a GPS device and a dog's water bowl. Tune in to learn whether or not he was able to fix it.</description>
            <pubDate>Wed, 01 Aug 2012 13:49:51 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-01-brainstuff-electronics-in-water.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-08-01-brainstuff-electronics-in-water.mp3' length='1455730' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, water-soaked electronics, water damage, electronics, gadgets, repairs</itunes:keywords>
            <itunes:duration>00:03:55</itunes:duration>
            <itunes:subtitle>Is it possible to rescue an electronic device dunked in water? In this episode, Marshall recounts an unfortunate meeting between a GPS device and a dog's water bowl. Tune in to learn whether or not he was able to fix it.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does the lighter in a barbeque grill work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-30-brainstuff-piezoelectric.mp3</link>
            <description>A barbeque grill has a push-button lighter that relies on piezoelectricity to generate a spark. Learn more about how piezoelectricity works (and the kinds of devices that use piezoelectric materials) in this episode of BrainStuff.</description>
            <pubDate>Mon, 30 Jul 2012 11:54:11 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-30-brainstuff-piezoelectric.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-30-brainstuff-piezoelectric.mp3' length='1008719' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, piezoelectric, barbeque grill, push-button lighter, electronics</itunes:keywords>
            <itunes:duration>00:02:41</itunes:duration>
            <itunes:subtitle>A barbeque grill has a push-button lighter that relies on piezoelectricity to generate a spark. Learn more about how piezoelectricity works (and the kinds of devices that use piezoelectric materials) in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Time Stands Still</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-20-brainstuff-brake-light.mp3</link>
            <description>Current technology isn't able to actually stop the passage of time, but under certain circumstances time can appear to stop -- and all you need is an airplane. Tune in to learn more.</description>
            <pubDate>Fri, 27 Jul 2012 10:56:42 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-20-brainstuff-brake-light.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-20-brainstuff-brake-light.mp3' length='932861' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, time, chronology, time travel, stop time</itunes:keywords>
            <itunes:duration>00:04:06</itunes:duration>
            <itunes:subtitle>Current technology isn't able to actually stop the passage of time, but under certain circumstances time can appear to stop -- and all you need is an airplane. Tune in to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Where should I sit to get the best ride on a roller coaster?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-25-brainstuff-best-seat.mp3</link>
            <description>Each roller coaster car is moved by the cars connected to it, which makes the experience of riding a rollercoaster a bit different in each car. Learn which seat on a roller coaster is best for you, based on science and your personal preferences.</description>
            <pubDate>Wed, 25 Jul 2012 09:48:39 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-25-brainstuff-best-seat.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-25-brainstuff-best-seat.mp3' length='1519363' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, roller coasters, adventure, amusement park, physics</itunes:keywords>
            <itunes:duration>00:04:06</itunes:duration>
            <itunes:subtitle>Each roller coaster car is moved by the cars connected to it, which makes the experience of riding a rollercoaster a bit different in each car. Learn which seat on a roller coaster is best for you, based on science and your personal preferences.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does your stomach keep from digesting itself?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-23-brainstuff-stomach.mp3</link>
            <description>The stomach is a hollow, many-layered organ that produces powerful acids to break down food -- and another substance to protect the stomach from being digested. Find out what this substance is, and learn more about the stomach, in this episode.</description>
            <pubDate>Mon, 23 Jul 2012 08:20:17 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-23-brainstuff-stomach.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-23-brainstuff-stomach.mp3' length='904807' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, stomach, digestion, nutrition, health, anatomy</itunes:keywords>
            <itunes:duration>00:02:23</itunes:duration>
            <itunes:subtitle>The stomach is a hollow, many-layered organ that produces powerful acids to break down food -- and another substance to protect the stomach from being digested. Find out what this substance is, and learn more about the stomach, in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What do the brake warning lights mean in my car?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-20-brainstuff-brake-light.mp3</link>
            <description>The brake warning lights in your car light up as part of a routine test. When they stay on, they indicate that there's something wrong with your brake system. Learn more about brake warning lights in this episode.</description>
            <pubDate>Fri, 20 Jul 2012 13:06:37 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-20-brainstuff-brake-light.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-20-brainstuff-brake-light.mp3' length='932861' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, brake warning light, driving, lights, dashboard</itunes:keywords>
            <itunes:duration>00:02:28</itunes:duration>
            <itunes:subtitle>The brake warning lights in your car light up as part of a routine test. When they stay on, they indicate that there's something wrong with your brake system. Learn more about brake warning lights in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How much does 20-pound bond paper weigh?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-18-brainstuff-20-pound-bond-paper.mp3</link>
            <description>Your average ream of printer paper is called 20-pound bond paper, but it doesn't actually weigh 20 pounds. Tune in as Marshall explains this strange American paper naming system -- and its metric alternative -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 18 Jul 2012 13:45:10 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-18-brainstuff-20-pound-bond-paper.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-18-brainstuff-20-pound-bond-paper.mp3' length='916709' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, 20 pound bond paper, paper, paper weight</itunes:keywords>
            <itunes:duration>00:02:25</itunes:duration>
            <itunes:subtitle>Your average ream of printer paper is called 20-pound bond paper, but it doesn't actually weigh 20 pounds. Tune in as Marshall explains this strange American paper naming system -- and its metric alternative -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is a circular saw louder than a table saw?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-16-brainstuff-saw-noise.mp3</link>
            <description>Circular saws are much noisier than table saws partly because of the type of motor they possess. Learn more about universal and induction motors in BrainStuff, a podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 16 Jul 2012 13:20:33 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-16-brainstuff-saw-noise.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-16-brainstuff-saw-noise.mp3' length='859507' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, circular saw, table saw, mechanics, motor</itunes:keywords>
            <itunes:duration>00:02:16</itunes:duration>
            <itunes:subtitle>Circular saws are much noisier than table saws partly because of the type of motor they possess. Learn more about universal and induction motors in BrainStuff, a podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do some doors open inward and some open outward?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-06-brainstuff-waves.mp3</link>
            <description>In personal residences, doors typically open inward; in public buildings, however, doors open outward. Why the difference? It's all about safety and security, as Marshall explains in this episode.</description>
            <pubDate>Fri, 13 Jul 2012 15:06:28 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-06-brainstuff-waves.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-06-brainstuff-waves.mp3' length='1519838' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, door opening, push versus pull</itunes:keywords>
            <itunes:duration>00:03:09</itunes:duration>
            <itunes:subtitle>In personal residences, doors typically open inward; in public buildings, however, doors open outward. Why the difference? It's all about safety and security, as Marshall explains in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do Wint-O-Green Life Savers spark in the dark?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-11-brainstuff-sparking-lifesavers.mp3</link>
            <description>If you've ever bitten into a Wint-O-Green Life Saver candy in the dark, you've probably noticed an accompanying spark of light. Marshall Brain explains the chemistry behind the phenomenon known as triboluminescence in this episode.</description>
            <pubDate>Wed, 11 Jul 2012 11:29:46 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-11-brainstuff-sparking-lifesavers.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-11-brainstuff-sparking-lifesavers.mp3' length='931609' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, wint-o-green, lifesavers, sparks, chemistry</itunes:keywords>
            <itunes:duration>00:02:28</itunes:duration>
            <itunes:subtitle>If you've ever bitten into a Wint-O-Green Life Saver candy in the dark, you've probably noticed an accompanying spark of light. Marshall Brain explains the chemistry behind the phenomenon known as triboluminescence in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does Christmas work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-09-brainstuff-christmas.mp3</link>
            <description>Christmas is the biggest holiday on the American calendar -- but how did it get this way? Travel back in time with Marshall Brain as he explores the evolution of Christmas in this special holiday episode.</description>
            <pubDate>Mon, 09 Jul 2012 11:27:16 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/smnty/2012-07-09-smnty-summer-shorts-camp.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-09-brainstuff-christmas.mp3' length='2100511' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, christmas, holiday, evolution of christmas, santa claus</itunes:keywords>
            <itunes:duration>00:05:43</itunes:duration>
            <itunes:subtitle>Christmas is the biggest holiday on the American calendar -- but how did it get this way? Travel back in time with Marshall Brain as he explores the evolution of Christmas in this special holiday episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why are West Coast waves bigger than East Coast waves?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-06-brainstuff-waves.mp3</link>
            <description>The West Coast of the United States seems to produce bigger, more impressive waves than the East Coast. But why? In this episode, Marshall explains the various factors that make West Coast waves bigger and better.</description>
            <pubDate>Fri, 06 Jul 2012 12:30:25 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-06-brainstuff-waves.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-06-brainstuff-waves.mp3' length='1519838' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, waves, weather, tides, west coast, east coast</itunes:keywords>
            <itunes:duration>00:04:05</itunes:duration>
            <itunes:subtitle>The West Coast of the United States seems to produce bigger, more impressive waves than the East Coast. But why? In this episode, Marshall explains the various factors that make West Coast waves bigger and better.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a T1 line and how does it work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-04-brainstuff-t1-line.mp3</link>
            <description>A T1 line is a dedicated fiber optic or copper cable that provides businesses with far more digital data than a residential line. Discover how T1 and other kinds of fiber optic lines work in this episode of BrainStuff.</description>
            <pubDate>Wed, 04 Jul 2012 13:24:00 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-04-brainstuff-t1-line.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-04-brainstuff-t1-line.mp3' length='1115605' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, fiber optic, t1, communication, cable, copper cable</itunes:keywords>
            <itunes:duration>00:02:58</itunes:duration>
            <itunes:subtitle>A T1 line is a dedicated fiber optic or copper cable that provides businesses with far more digital data than a residential line. Discover how T1 and other kinds of fiber optic lines work in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is the difference between good and bad toy helicopters?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-02-brainstuff-toy-helicopters.mp3</link>
            <description>Can you buy a good, long-lasting toy helicopter for under $30? Tune in and learn more about toy helicopters with Marshall Brain.</description>
            <pubDate>Mon, 02 Jul 2012 12:51:32 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-02-brainstuff-toy-helicopters.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-07-02-brainstuff-toy-helicopters.mp3' length='2481412' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, toy helicopter, remote control toys, electronics</itunes:keywords>
            <itunes:duration>00:06:46</itunes:duration>
            <itunes:subtitle>Can you buy a good, long-lasting toy helicopter for under $30? Tune in and learn more about toy helicopters with Marshall Brain.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do you decaffeinate coffee and tea?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-29-brainstuff-decaff.mp3</link>
            <description>There are multiple methods of removing caffeine from naturally caffeinated plant products. Learn more about these processes -- and how much caffeine they really remove -- in this episode.</description>
            <pubDate>Fri, 29 Jun 2012 14:46:23 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-29-brainstuff-decaff.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-29-brainstuff-decaff.mp3' length='1514338' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, decaffeinated coffee, caffeine, decaffeination</itunes:keywords>
            <itunes:duration>00:04:05</itunes:duration>
            <itunes:subtitle>There are multiple methods of removing caffeine from naturally caffeinated plant products. Learn more about these processes -- and how much caffeine they really remove -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do Voyager 1 and 2 transmit messages from far away?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-27-brainstuff-voyager.mp3</link>
            <description>Spacecraft Voyager 1 and Voyager 2 transmit images of space and its contents from great distances, but how? Learn more about the technology that allows them to send radio messages from far, far away in this episode of BrainStuff.</description>
            <pubDate>Wed, 27 Jun 2012 12:13:30 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-27-brainstuff-voyager.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-27-brainstuff-voyager.mp3' length='1107627' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, voyager 1, voyager 2, space exploration, radio messages, deep space</itunes:keywords>
            <itunes:duration>00:02:57</itunes:duration>
            <itunes:subtitle>Spacecraft Voyager 1 and Voyager 2 transmit images of space and its contents from great distances, but how? Learn more about the technology that allows them to send radio messages from far, far away in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What will airplanes look like in 2025?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-25-brainstuff-airplanes-2025.mp3</link>
            <description>Most modern airplanes have a similar design, but NASA has a plan to move the world of aviation into the future by partnering with the world's airplane manufacturers to radically redesign the typical airplane. Tune in to learn more.</description>
            <pubDate>Mon, 25 Jun 2012 14:22:25 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-25-brainstuff-airplanes-2025.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-25-brainstuff-airplanes-2025.mp3' length='1924198' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, airplanes, innovation, 2025, nasa, aerodynamic engineering</itunes:keywords>
            <itunes:duration>00:05:13</itunes:duration>
            <itunes:subtitle>Most modern airplanes have a similar design, but NASA has a plan to move the world of aviation into the future by partnering with the world's airplane manufacturers to radically redesign the typical airplane. Tune in to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Do Power Balance Wristbands really work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-22-brainstuff-power-balance.mp3</link>
            <description>Do Power Balance Wristbands really work? Find out in this BrainStuff podcast by Marshall Brain.</description>
            <pubDate>Fri, 22 Jun 2012 15:46:30 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-22-brainstuff-power-balance.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-22-brainstuff-power-balance.mp3' length='1933447' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, power balance, health, medicine, pseudo-science, scams</itunes:keywords>
            <itunes:duration>00:05:15</itunes:duration>
            <itunes:subtitle>Do Power Balance Wristbands really work? Find out in this BrainStuff podcast by Marshall Brain.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What does it mean when a car has dual overhead cams?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-20-brainstuff-dohc.mp3</link>
            <description>A camshaft plays an integral role in the functioning of an engine. And dual overhead cams ramp up a machine's performance even more. Find out how dual overhead camshafts work in this episode.</description>
            <pubDate>Wed, 20 Jun 2012 11:48:39 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-20-brainstuff-dohc.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, dual overhead cam shaft, car, auto, engine, performance</itunes:keywords>
            <itunes:duration>00:03:04</itunes:duration>
            <itunes:subtitle>A camshaft plays an integral role in the functioning of an engine. And dual overhead cams ramp up a machine's performance even more. Find out how dual overhead camshafts work in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do cats purr?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-18-brainstuff-cat-purr.mp3</link>
            <description>Cats tend to purr when they're happy, but pleasure isn't the only reason for this behavior. And they aren't the only animals who purr. Find out why and how cats and other animals purr in this episode of BrainStuff.</description>
            <pubDate>Mon, 18 Jun 2012 11:32:58 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-18-brainstuff-cat-purr.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-18-brainstuff-cat-purr.mp3' length='693810' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, cat purr, biology, pets, felines</itunes:keywords>
            <itunes:duration>00:01:48</itunes:duration>
            <itunes:subtitle>Cats tend to purr when they're happy, but pleasure isn't the only reason for this behavior. And they aren't the only animals who purr. Find out why and how cats and other animals purr in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does asphalt work, and where does it come from?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-15-brainstuff-asphalt.mp3</link>
            <description>Asphalt is an extremely common, oil-derived material that's used to pave a majority of roads in the United States. Tune in to learn more about asphalt.</description>
            <pubDate>Fri, 15 Jun 2012 15:22:26 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-15-brainstuff-asphalt.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-15-brainstuff-asphalt.mp3' length='1789733' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, asphalt, pavement, oil, auto, road, driving</itunes:keywords>
            <itunes:duration>00:04:51</itunes:duration>
            <itunes:subtitle>Asphalt is an extremely common, oil-derived material that's used to pave a majority of roads in the United States. Tune in to learn more about asphalt.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What's the most efficient way to mow your yard?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-13-brainstuff-lawn-effiency.mp3</link>
            <description>There's more than one way to mow a yard, but which is the most efficient? Tune in to this episode of BrainStuff to find out.</description>
            <pubDate>Wed, 13 Jun 2012 14:33:58 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-13-brainstuff-lawn-effiency.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-13-brainstuff-lawn-effiency.mp3' length='999316' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, lawn, lawn care, efficiency, mowing, lawn mower</itunes:keywords>
            <itunes:duration>00:02:39</itunes:duration>
            <itunes:subtitle>There's more than one way to mow a yard, but which is the most efficient? Tune in to this episode of BrainStuff to find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is it harmful to breathe 100 percent oxygen?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-11-brainstuff-oxygen.mp3</link>
            <description>Oxygen is a necessary component of the air we breathe; but in its pure form, it can be hazardous to one's health. Marshall Brain explains how breathing pure oxygen harms the human body in this episode.</description>
            <pubDate>Mon, 11 Jun 2012 17:19:54 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-11-brainstuff-oxygen.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-11-brainstuff-oxygen.mp3' length='1565282' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, oxygen, biology, breathing, lungs, health</itunes:keywords>
            <itunes:duration>00:04:13</itunes:duration>
            <itunes:subtitle>Oxygen is a necessary component of the air we breathe; but in its pure form, it can be hazardous to one's health. Marshall Brain explains how breathing pure oxygen harms the human body in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do stabilizer bars work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-08-brainstuff-stabilizer-bar-audible.mp3</link>
            <description>Stabilizer bars are designed to keep your car from rolling when you make sharp turns. Learn more about how these bars work in this episode of BrainStuff.</description>
            <pubDate>Fri, 08 Jun 2012 12:45:06 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-08-brainstuff-stabilizer-bar-audible.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-08-brainstuff-stabilizer-bar-audible.mp3' length='1590186' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, stabilizer bar, auto, driving, safety</itunes:keywords>
            <itunes:duration>00:04:18</itunes:duration>
            <itunes:subtitle>Stabilizer bars are designed to keep your car from rolling when you make sharp turns. Learn more about how these bars work in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does disk defragmentation work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-06-brainstuff-disk-defrag.mp3</link>
            <description>The term 'disk defrag' usually refers to the Windows utility known as the disk defragmenter. But what exactly is this thing, and how does it work? Tune in as Marshall Brain explains disk defragmentation in this podcast.</description>
            <pubDate>Wed, 06 Jun 2012 15:33:34 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-06-brainstuff-disk-defrag.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>The term 'disk defrag' usually refers to the Windows utility known as the disk defragmenter. But what exactly is this thing, and how does it work? Tune in as Marshall Brain explains disk defragmentation in this podcast.	howstuffworks, how stuff works, marshall, disk defragmentation, computer, hard drive maintenance</itunes:keywords>
            <itunes:duration>00:03:38</itunes:duration>
            <itunes:subtitle>The term 'disk defrag' usually refers to the Windows utility known as the disk defragmenter. But what exactly is this thing, and how does it work? Tune in as Marshall Brain explains disk defragmentation in this podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is it true that a diesel engine can operate underwater?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-04-brainstuff-waterproof-diesel.mp3</link>
            <description>Under certain circumstances, diesel engines can operate while submerged in water. Find out what it takes to waterproof an engine -- and why diesel engines are better candidates than their gasoline counterparts -- in this episode of BrainStuff.</description>
            <pubDate>Mon, 04 Jun 2012 10:55:38 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-04-brainstuff-waterproof-diesel.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, diesel engine, diesel underwater, mechanics, automotive</itunes:keywords>
            <itunes:duration>00:03:05</itunes:duration>
            <itunes:subtitle>Under certain circumstances, diesel engines can operate while submerged in water. Find out what it takes to waterproof an engine -- and why diesel engines are better candidates than their gasoline counterparts -- in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do space mirrors work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-01-brainstuff-space-mirrors.mp3</link>
            <description>Mirrors placed in space could deflect excessive sunlight and combat global warming trends. Find out more about space mirrors in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 01 Jun 2012 09:07:38 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-01-brainstuff-space-mirrors.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-06-01-brainstuff-space-mirrors.mp3' length='793972' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, space mirrors, global warming, technology, innovation</itunes:keywords>
            <itunes:duration>00:02:05</itunes:duration>
            <itunes:subtitle>Mirrors placed in space could deflect excessive sunlight and combat global warming trends. Find out more about space mirrors in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Can we make gasoline from bacteria?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-30-brainstuff-joule-unlimited.mp3</link>
            <description>A new company is claiming that, next year, the problems of carbon emissions, foreign oil dependence, oil spills, fuel shortages, etc. will all end due to a breakthrough in biotechnology. Is it true?</description>
            <pubDate>Wed, 30 May 2012 12:21:43 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-30-brainstuff-joule-unlimited.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-30-brainstuff-joule-unlimited.mp3' length='2209922' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, bacteria, gas, joule, alternative energy</itunes:keywords>
            <itunes:duration>00:06:01</itunes:duration>
            <itunes:subtitle>A new company is claiming that, next year, the problems of carbon emissions, foreign oil dependence, oil spills, fuel shortages, etc. will all end due to a breakthrough in biotechnology. Is it true?</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a fiber optic cable work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-28-brainstuff-fiber-optic.mp3</link>
            <description>Fiber optic cables make long-distance telephone communication and Internet access much more affordable and accessible. Get Marshall's explanation of fiber optic cables in this episode of BrainStuff.</description>
            <pubDate>Mon, 28 May 2012 17:44:14 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-28-brainstuff-fiber-optic.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-28-brainstuff-fiber-optic.mp3' length='1443175' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, fiber optic cable, tech, telephony</itunes:keywords>
            <itunes:duration>00:03:53</itunes:duration>
            <itunes:subtitle>Fiber optic cables make long-distance telephone communication and Internet access much more affordable and accessible. Get Marshall's explanation of fiber optic cables in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Does airing out mattresses outside do any good?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-25-brainstuff-mattress-disinfect.mp3</link>
            <description>Airing out rugs and mattresses outdoors is a great way to disinfect them, thanks to a little thing called ultraviolet light. Find out how UV light can disinfect everything from rugs to water in this episode of BrainStuff.</description>
            <pubDate>Fri, 25 May 2012 15:30:02 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-25-brainstuff-mattress-disinfect.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-25-brainstuff-mattress-disinfect.mp3' length='796031' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, mattress, ultraviolet light, cleaning, hygiene, contamination</itunes:keywords>
            <itunes:duration>00:02:05</itunes:duration>
            <itunes:subtitle>Airing out rugs and mattresses outdoors is a great way to disinfect them, thanks to a little thing called ultraviolet light. Find out how UV light can disinfect everything from rugs to water in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a QWERTY keyboard work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-23-brainstuff-qwerty.mp3</link>
            <description>The QWERTY keyboard is the standard for most computers today, but why are the letters arranged in such a peculiar way? Learn more about the QWERTY keyboard's unusual layout -- and how it compares to the Dvorak design -- in this episode.</description>
            <pubDate>Wed, 23 May 2012 12:47:17 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-23-brainstuff-qwerty.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-23-brainstuff-qwerty.mp3' length='1400071' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, qwerty, keyboard, dvorak, tradition</itunes:keywords>
            <itunes:duration>00:03:00</itunes:duration>
            <itunes:subtitle>The QWERTY keyboard is the standard for most computers today, but why are the letters arranged in such a peculiar way? Learn more about the QWERTY keyboard's unusual layout -- and how it compares to the Dvorak design -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do newspapers turn yellow over time?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-21-brainstuff-paper-yellow.mp3</link>
            <description>Newspapers turn yellow over time because they contain lignin, a substance in wood that oxidates when exposed to air and light. Learn more about lignin and paper processing in this episode of BrainStuff.</description>
            <pubDate>Mon, 21 May 2012 15:19:36 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-21-brainstuff-paper-yellow.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-21-brainstuff-paper-yellow.mp3' length='1127361' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, newspaper, chemistry, newsprint</itunes:keywords>
            <itunes:duration>00:03:00</itunes:duration>
            <itunes:subtitle>Newspapers turn yellow over time because they contain lignin, a substance in wood that oxidates when exposed to air and light. Learn more about lignin and paper processing in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do feet stink?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-16-brainstuff-feet-sweat.mp3</link>
            <description>What causes stinky, smelly feet? Sweat and bacteria. Find out exactly how bacteria turn sweat into malodorous feet in this episode.</description>
            <pubDate>Wed, 16 May 2012 11:54:56 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-16-brainstuff-feet-sweat.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-16-brainstuff-feet-sweat.mp3' length='1044896' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, feet, stink, foot odor, bacteria, smell</itunes:keywords>
            <itunes:duration>00:02:47</itunes:duration>
            <itunes:subtitle>What causes stinky, smelly feet? Sweat and bacteria. Find out exactly how bacteria turn sweat into malodorous feet in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do instant cameras work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-14-brainstuff-instant-film-audible.mp3</link>
            <description>Instant cameras makes it possible to see a photograph almost immediately after you take it. But how? In this episode, Marshall explains the chemical processes behind regular and instant photographic film.</description>
            <pubDate>Mon, 14 May 2012 12:06:17 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-14-brainstuff-instant-film-audible.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-14-brainstuff-instant-film-audible.mp3' length='2906132' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, instant film, photography, visual, chemical</itunes:keywords>
            <itunes:duration>00:07:57</itunes:duration>
            <itunes:subtitle>Instant cameras makes it possible to see a photograph almost immediately after you take it. But how? In this episode, Marshall explains the chemical processes behind regular and instant photographic film.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do eggs turn hard when you boil them?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-11-brainstuff-hard-boiled-eggs.mp3</link>
            <description>Eggs are rich in protein, and this protein causes eggs to turn hard when they're boiled - but how does it actually work? Tune in as Marshall Brain breaks down the science behind hard-boiled eggs.</description>
            <pubDate>Fri, 11 May 2012 16:24:31 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-11-brainstuff-hard-boiled-eggs.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-11-brainstuff-hard-boiled-eggs.mp3' length='1225164' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, cooking, hardboiled egg, food, chemistry, cuisine</itunes:keywords>
            <itunes:duration>00:03:17</itunes:duration>
            <itunes:subtitle>Eggs are rich in protein, and this protein causes eggs to turn hard when they're boiled - but how does it actually work? Tune in as Marshall Brain breaks down the science behind hard-boiled eggs.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is Schadenfreude?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-09-brainstuff-schadenfreude.mp3</link>
            <description>Schadenfreude is a German word that means taking pleasure in someone else's pain. But it's not the same as sadism, as Marshall Brain explains in this episode. Tune in to learn more about this particularly German sensation.</description>
            <pubDate>Wed, 09 May 2012 12:53:18 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-09-brainstuff-schadenfreude.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-09-brainstuff-schadenfreude.mp3' length='1324515' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, schadenfreude, sadism, german, psychology,</itunes:keywords>
            <itunes:duration>00:03:33</itunes:duration>
            <itunes:subtitle>Schadenfreude is a German word that means taking pleasure in someone else's pain. But it's not the same as sadism, as Marshall Brain explains in this episode. Tune in to learn more about this particularly German sensation.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Can nasal sprays be addictive?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-07-brainstuff-nasal-sprays-audible.mp3</link>
            <description>Some people have become so dependent on their nasal sprays and products that they might worry they're addicted. Marshall Brain explains why you can't really be addicted to nasal products in this episode.</description>
            <pubDate>Mon, 07 May 2012 12:18:37 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-07-brainstuff-nasal-sprays-audible.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-07-brainstuff-nasal-sprays-audible.mp3' length='1882185' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, nasal spray, addiction, medicine, nasal, allergy</itunes:keywords>
            <itunes:duration>00:05:06</itunes:duration>
            <itunes:subtitle>Some people have become so dependent on their nasal sprays and products that they might worry they're addicted. Marshall Brain explains why you can't really be addicted to nasal products in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does the snow dragon eat and digest snow?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-04-brainstuff-snow-dragon-eat-snow.mp3</link>
            <description>For cities plagued by yearly snowstorms, a fleet of snow plows and salt often aren't enough to get rid of excess drifts. Luckily, there's another option: Snow dragons. These machines can melt snow on the spot -- but how do they work? Tune in to find out.</description>
            <pubDate>Fri, 04 May 2012 14:47:52 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-04-brainstuff-snow-dragon-eat-snow.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-04-brainstuff-snow-dragon-eat-snow.mp3' length='1804303' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, snow dragon, eat snow, technology</itunes:keywords>
            <itunes:duration>00:04:53</itunes:duration>
            <itunes:subtitle>For cities plagued by yearly snowstorms, a fleet of snow plows and salt often aren't enough to get rid of excess drifts. Luckily, there's another option: Snow dragons. These machines can melt snow on the spot -- but how do they work? Tune in to find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does dry ice work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-02-brainstuff-dry-ice.mp3</link>
            <description>Dry ice is different from regular ice in several ways. Find out what makes dry ice so unique -- and why it's so good for transporting perishables over long distances -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 02 May 2012 11:40:09 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-02-brainstuff-dry-ice.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-05-02-brainstuff-dry-ice.mp3' length='1253828' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, dry ice, chemistry, transportation</itunes:keywords>
            <itunes:duration>00:03:21</itunes:duration>
            <itunes:subtitle>Dry ice is different from regular ice in several ways. Find out what makes dry ice so unique -- and why it's so good for transporting perishables over long distances -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What are chiggers, and how do they bite you?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-30-brainstuff-chiggers.mp3</link>
            <description>If you go outdoors during the right time of year, you may be bitten by chiggers. But what are these creatures, and why do they attack unsuspecting humans? Listen in as Marshall Brain breaks down the life cycle of the chigger -- and how it can affect you.</description>
            <pubDate>Mon, 30 Apr 2012 15:35:59 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-30-brainstuff-chiggers.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-30-brainstuff-chiggers.mp3' length='1435505' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, chigger, bug, insect, nature</itunes:keywords>
            <itunes:duration>00:03:52</itunes:duration>
            <itunes:subtitle>If you go outdoors during the right time of year, you may be bitten by chiggers. But what are these creatures, and why do they attack unsuspecting humans? Listen in as Marshall Brain breaks down the life cycle of the chigger -- and how it can affect you.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do you add a USB device if you've run out of ports?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-27-brainstuff-usb-hubs-audible.mp3</link>
            <description>Desktop computers and laptops only have so many USB ports, so what do you do when you want to plug in more USB devices and they're all full? You buy a USB hub. Find out how these hubs work, and which kind you should get, in this episode of BrainStuff.</description>
            <pubDate>Fri, 27 Apr 2012 12:06:36 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-27-brainstuff-usb-hubs.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-27-brainstuff-usb-hubs-audible.mp3' length='1363575' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, usb hubs, usb, tech, computer</itunes:keywords>
            <itunes:duration>00:03:39</itunes:duration>
            <itunes:subtitle>Desktop computers and laptops only have so many USB ports, so what do you do when you want to plug in more USB devices and they're all full? You buy a USB hub. Find out how these hubs work, and which kind you should get, in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a credit card's magnetic stripe work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-25-brainstuff-magstripe.mp3</link>
            <description>The magnetic stripe on the back of the card plays a key role in transactions made by credit card. Learn more about how these &quot;mag stripes&quot; work in this episode of BrainStuff.</description>
            <pubDate>Wed, 25 Apr 2012 12:27:16 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-25-brainstuff-magstripe.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-25-brainstuff-magstripe.mp3' length='1685328' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, mag stripe, magnetic stripe, credit card,</itunes:keywords>
            <itunes:duration>00:04:33</itunes:duration>
            <itunes:subtitle>The magnetic stripe on the back of the card plays a key role in transactions made by credit card. Learn more about how these &quot;mag stripes&quot; work in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is an autograph worth?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-23-brainstuff-autographs.mp3</link>
            <description>An autograph is a famous person's signature, but what determines how valuable it is? Marshall Brain discusses the relative value of autographs -- and what you can do to increase the value of your own signature.</description>
            <pubDate>Mon, 23 Apr 2012 12:53:28 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-23-brainstuff-autographs.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-23-brainstuff-autographs.mp3' length='1616674' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, autograph, autographing, collection, celebrity</itunes:keywords>
            <itunes:duration>00:04:22</itunes:duration>
            <itunes:subtitle>An autograph is a famous person's signature, but what determines how valuable it is? Marshall Brain discusses the relative value of autographs -- and what you can do to increase the value of your own signature.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What are electrolytes?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-20-brainstuff-electrolytes.mp3</link>
            <description>What are electrolytes, and why do athletes and sick kids need them? Marshall Brain explains how ions and electrolytes work in your body in this episode.</description>
            <pubDate>Fri, 20 Apr 2012 12:14:37 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-20-brainstuff-electrolytes.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-20-brainstuff-electrolytes.mp3' length='1060887' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, electrolytes, nutrition, biology, health</itunes:keywords>
            <itunes:duration>00:02:49</itunes:duration>
            <itunes:subtitle>What are electrolytes, and why do athletes and sick kids need them? Marshall Brain explains how ions and electrolytes work in your body in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is Low-E glass?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-18-brainstuff-low-e-windows.mp3</link>
            <description>Low-emissivity (Low-E) glass is a special, expensive type that blocks out ultraviolet and infrared light. This coated glass can help protect your furniture and improve the energy efficiency of your home, as Marshall Brain explains in this episode.</description>
            <pubDate>Wed, 18 Apr 2012 11:21:47 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-18-brainstuff-low-e-windows.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-18-brainstuff-low-e-windows.mp3' length='2251756' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, low-emissivity, low-e, glass, ultraviolet, infrared</itunes:keywords>
            <itunes:duration>00:06:08</itunes:duration>
            <itunes:subtitle>Low-emissivity (Low-E) glass is a special, expensive type that blocks out ultraviolet and infrared light. This coated glass can help protect your furniture and improve the energy efficiency of your home, as Marshall Brain explains in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do self-winding watches work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-16-brainstuff-self-winding-watch.mp3</link>
            <description>Self-winding watches keep the time with the help of a piece of metal, gravity and the natural movement of your arm. Tune in to learn more about self-winding watches in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 16 Apr 2012 16:31:25 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-16-brainstuff-self-winding-watch.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-16-brainstuff-self-winding-watch.mp3' length='705894' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, self-winding watch, watch, time table, time keeping</itunes:keywords>
            <itunes:duration>00:01:50</itunes:duration>
            <itunes:subtitle>Self-winding watches keep the time with the help of a piece of metal, gravity and the natural movement of your arm. Tune in to learn more about self-winding watches in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do most zippers say 'YKK' on the pull-tab?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-13-brainstuff-ykk.mp3</link>
            <description>Have you ever wondered why zippers often have the letters 'YKK' etched into them? Learn more about the Japanese company behind the tiny letters -- and the zippers -- in this episode.</description>
            <pubDate>Fri, 13 Apr 2012 15:49:23 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-13-brainstuff-ykk.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-13-brainstuff-ykk.mp3' length='860761' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, ykk, zipper, zippers, manufacturing</itunes:keywords>
            <itunes:duration>00:02:16</itunes:duration>
            <itunes:subtitle>Have you ever wondered why zippers often have the letters 'YKK' etched into them? Learn more about the Japanese company behind the tiny letters -- and the zippers -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Anti-reflective Coatings</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-11-brainstuff-anti-reflective-coating.mp3</link>
            <description>Anti-reflective coatings are used to eliminate any light reflective off the back of the lenses. Learn about anti-reflective coatings in this BrainStuff episode.</description>
            <pubDate>Wed, 11 Apr 2012 11:50:47 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-11-brainstuff-anti-reflective-coating.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-11-brainstuff-anti-reflective-coating.mp3' length='1443165' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, anti-reflective coating, glasses, light, engineering, backglare</itunes:keywords>
            <itunes:duration>00:03:53</itunes:duration>
            <itunes:subtitle>Anti-reflective coatings are used to eliminate any light reflective off the back of the lenses. Learn about anti-reflective coatings in this BrainStuff episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How much coal does a light bulb need to run for a year?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-09-brainstuff-coal-bulb.mp3</link>
            <description>How much coal do you need to run a 100-watt light bulb 24 hours a day for a year? The answer might surprised. Tune in and find out in this episode of BrainStuff.</description>
            <pubDate>Mon, 09 Apr 2012 11:05:57 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-09-brainstuff-coal-bulb.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-09-brainstuff-coal-bulb.mp3' length='1192264' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, coal, energy, power, electricity, light</itunes:keywords>
            <itunes:duration>00:03:11</itunes:duration>
            <itunes:subtitle>How much coal do you need to run a 100-watt light bulb 24 hours a day for a year? The answer might surprised. Tune in and find out in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is mayonnaise?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-06-brainstuff-mayo.mp3</link>
            <description>Mayo is an emulsion - a mixture of two liquids that normally can't be combined. So how do these ingredients come together? Tune in to learn how oil, egg yolks and acid combine to form one of the world's most popular condiments.</description>
            <pubDate>Fri, 06 Apr 2012 12:16:54 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-06-brainstuff-mayo.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-06-brainstuff-mayo.mp3' length='1961952' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, mayo, mayonnaise, condiment, cooking, emulsion</itunes:keywords>
            <itunes:duration>00:05:19</itunes:duration>
            <itunes:subtitle>Mayo is an emulsion - a mixture of two liquids that normally can't be combined. So how do these ingredients come together? Tune in to learn how oil, egg yolks and acid combine to form one of the world's most popular condiments.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is there an easy way to understand how time zones work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-04-brainstuff-time-zones.mp3</link>
            <description>There are 24 different time zones -- but why do we have them? In this podcast, Marshall recounts how society evolved time zones, and also gives you an easy way to model the structure of time zones across the globe.</description>
            <pubDate>Wed, 04 Apr 2012 11:19:15 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-04-brainstuff-time-zones.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-04-brainstuff-time-zones.mp3' length='2067784' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, time zone, new year, date line, woodrow, railroad</itunes:keywords>
            <itunes:duration>00:05:37</itunes:duration>
            <itunes:subtitle>There are 24 different time zones -- but why do we have them? In this podcast, Marshall recounts how society evolved time zones, and also gives you an easy way to model the structure of time zones across the globe.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Where does aluminum come from?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-02-brainstuff-aluminum.mp3</link>
            <description>Aluminum is both lightweight and strong, so it's no wonder that space stations, airplanes and thousands of other products use this metal. But where does it come from, and what makes it so special? Tune in to learn more.</description>
            <pubDate>Mon, 02 Apr 2012 12:07:40 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-02-brainstuff-aluminum.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-04-02-brainstuff-aluminum.mp3' length='1864161' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, aluminum, engineering, fabrication, industry, material science</itunes:keywords>
            <itunes:duration>00:05:03</itunes:duration>
            <itunes:subtitle>Aluminum is both lightweight and strong, so it's no wonder that space stations, airplanes and thousands of other products use this metal. But where does it come from, and what makes it so special? Tune in to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Will space tourism become a reality?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-30-brainstuff-space-tourism.mp3</link>
            <description>With private companies frantically searching for new ways to take people into orbit, it seems that space tourism could become a reality (for those who can afford it). But  will it ever really happen? Tune in and learn more in this podcast.</description>
            <pubDate>Fri, 30 Mar 2012 11:48:05 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-30-brainstuff-space-tourism.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-30-brainstuff-space-tourism.mp3' length='2015416' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, space tourism, privatized space, space exploration, astronaut</itunes:keywords>
            <itunes:duration>00:05:28</itunes:duration>
            <itunes:subtitle>With private companies frantically searching for new ways to take people into orbit, it seems that space tourism could become a reality (for those who can afford it). But  will it ever really happen? Tune in and learn more in this podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a restraining order, and how do you get one?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-28-brainstuff-restraining-order.mp3</link>
            <description>Restraining orders are cropping up in the news more and more frequently, but how do they work? Join Marshall Brain as he breaks down the legality of restraining orders -- and how to get one.</description>
            <pubDate>Wed, 28 Mar 2012 12:04:08 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-28-brainstuff-restraining-order.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-28-brainstuff-restraining-order.mp3' length='1753371' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, restraining order, legal, law, stalking</itunes:keywords>
            <itunes:duration>00:04:45</itunes:duration>
            <itunes:subtitle>Restraining orders are cropping up in the news more and more frequently, but how do they work? Join Marshall Brain as he breaks down the legality of restraining orders -- and how to get one.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does someone become a saint?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-26-brainstuff-saints.mp3</link>
            <description>Many religions bestow a special status on people who demonstrate a life of almost perfect virtue -- but how does canonization actually occur? In this episode, Marshall breaks down the process used to officially recognize a person as a saint.</description>
            <pubDate>Mon, 26 Mar 2012 15:46:01 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-26-brainstuff-saints.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-26-brainstuff-saints.mp3' length='2019012' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, saint, sainthood, beautification, catholicism, religion, culture</itunes:keywords>
            <itunes:duration>00:05:29</itunes:duration>
            <itunes:subtitle>Many religions bestow a special status on people who demonstrate a life of almost perfect virtue -- but how does canonization actually occur? In this episode, Marshall breaks down the process used to officially recognize a person as a saint.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Proton Therapy Works</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-23-brainstuff-proton-therapy.mp3</link>
            <description>As a method of treating cancer, proton therapy has great potential. But how does it work, exactly, and what makes it superior to other forms of cancer treatment? Tune in and find out.</description>
            <pubDate>Fri, 23 Mar 2012 12:38:43 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-23-brainstuff-proton-therapy.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-23-brainstuff-proton-therapy.mp3' length='2061954' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, proton therapy, medicine,</itunes:keywords>
            <itunes:duration>00:05:36</itunes:duration>
            <itunes:subtitle>As a method of treating cancer, proton therapy has great potential. But how does it work, exactly, and what makes it superior to other forms of cancer treatment? Tune in and find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is the worst invasive public species?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-21-brainstuff-invasive-species.mp3</link>
            <description>From kudzu to cane toads, invasive species are changing the world. But which of these transplants is the worst for the local landscape? Tune in as Marshall Brain tackles invasive species across the world -- and ultimately concludes which one is the worst.</description>
            <pubDate>Wed, 21 Mar 2012 13:14:27 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-21-brainstuff-invasive-species.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-21-brainstuff-invasive-species.mp3' length='1898968' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, invasive species, ecology, cane toad, kudzu</itunes:keywords>
            <itunes:duration>00:05:09</itunes:duration>
            <itunes:subtitle>From kudzu to cane toads, invasive species are changing the world. But which of these transplants is the worst for the local landscape? Tune in as Marshall Brain tackles invasive species across the world -- and ultimately concludes which one is the worst.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Can picking a movie theater get any more complicated?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-19-brainstuff-movie-theaters.mp3</link>
            <description>With all the recent technological breakthroughs, choosing the right movie theatre has become increasingly complex. Why? Listen in as Marshall breaks down the different sound and video technologies available in modern movie theaters.</description>
            <pubDate>Mon, 19 Mar 2012 11:48:41 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-19-brainstuff-movie-theaters.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-19-brainstuff-movie-theaters.mp3' length='1570463' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, movies, film, movie theater, sit in a movie theater</itunes:keywords>
            <itunes:duration>00:04:14</itunes:duration>
            <itunes:subtitle>With all the recent technological breakthroughs, choosing the right movie theatre has become increasingly complex. Why? Listen in as Marshall breaks down the different sound and video technologies available in modern movie theaters.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does emergency preparedness work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-16-brainstuff-emergency-preparedness.mp3</link>
            <description>In moments, a natural disaster can level cities, kill thousands and force survivors to scavenge through the rubble for supplies. In this podcast, Marshall discusses the importance of preparedness and the types of supplies you may need in an emergency.</description>
            <pubDate>Fri, 16 Mar 2012 10:46:19 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-16-brainstuff-emergency-preparedness.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-16-brainstuff-emergency-preparedness.mp3' length='1746773' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, emergency, emergency preparedness, disasters, supplies</itunes:keywords>
            <itunes:duration>00:04:47</itunes:duration>
            <itunes:subtitle>In moments, a natural disaster can level cities, kill thousands and force survivors to scavenge through the rubble for supplies. In this podcast, Marshall discusses the importance of preparedness and the types of supplies you may need in an emergency.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do strokes work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-14-brainstuff-stroke.mp3</link>
            <description>In a stroke, something disrupts the normal blood supply to parts of the brain. Without oxygen, affected brain cells will begin to die. Tune in as Marshall explains the causes of -- and treatments for -- strokes.</description>
            <pubDate>Wed, 14 Mar 2012 13:12:11 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-14-brainstuff-stroke.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-14-brainstuff-stroke.mp3' length='1721836' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, stroke</itunes:keywords>
            <itunes:duration>00:04:39</itunes:duration>
            <itunes:subtitle>In a stroke, something disrupts the normal blood supply to parts of the brain. Without oxygen, affected brain cells will begin to die. Tune in as Marshall explains the causes of -- and treatments for -- strokes.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can a valet rip you off?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-12-brainstuff-valet-scam.mp3</link>
            <description>Once relegated to high-end restaurants and clubs, valets are increasingly common across the United States. But how can you trust your valet -- and how will you know if the valet is scamming you? Tune in and find out.</description>
            <pubDate>Mon, 12 Mar 2012 08:51:42 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-12-brainstuff-valet-scam.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-12-brainstuff-valet-scam.mp3' length='1987039' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, valet, restaurant, scam, parking</itunes:keywords>
            <itunes:duration>00:05:24</itunes:duration>
            <itunes:subtitle>Once relegated to high-end restaurants and clubs, valets are increasingly common across the United States. But how can you trust your valet -- and how will you know if the valet is scamming you? Tune in and find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Semi Submarines</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-09-brainstuff-semi-submarine.mp3</link>
            <description>There's a reason that most submarines are owned by governments - they're incredibly expensive. So what's a sub-loving consumer to do? Tune in as Marshall Brain breaks down the science behind semi subs (and why it makes them so much less expensive).</description>
            <pubDate>Fri, 09 Mar 2012 13:43:19 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-09-brainstuff-semi-submarine.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-09-brainstuff-semi-submarine.mp3' length='2027306' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, submarines, semi submarines, subs</itunes:keywords>
            <itunes:duration>00:05:30</itunes:duration>
            <itunes:subtitle>There's a reason that most submarines are owned by governments - they're incredibly expensive. So what's a sub-loving consumer to do? Tune in as Marshall Brain breaks down the science behind semi subs (and why it makes them so much less expensive).</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a pressurized airplane cabin work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-07-brainstuff-airplane-cabin.mp3</link>
            <description>How does a pressurized airplane cabin work -- more importantly, what happens when the pressure fails? Join Marshall Brain as he breaks down the science behind cabin pressurization.</description>
            <pubDate>Wed, 07 Mar 2012 11:23:56 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-07-brainstuff-airplane-cabin.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-07-brainstuff-airplane-cabin.mp3' length='2094104' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, airplanes, airplane cabin, pressure, pressurization</itunes:keywords>
            <itunes:duration>00:05:41</itunes:duration>
            <itunes:subtitle>How does a pressurized airplane cabin work -- more importantly, what happens when the pressure fails? Join Marshall Brain as he breaks down the science behind cabin pressurization.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Can people really build missiles from scratch?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-05-brainstuff-salt-missile.mp3</link>
            <description>In the film Salt, Angelina Jolie's character creates a missile from handy household ingredients -- but could this happen in real life? Tune in as Marshall breaks down the science behind improvised explosives.</description>
            <pubDate>Mon, 05 Mar 2012 13:29:53 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-05-brainstuff-salt-missile.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-05-brainstuff-salt-missile.mp3' length='2069969' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, salt missile, chemistry</itunes:keywords>
            <itunes:duration>00:05:37</itunes:duration>
            <itunes:subtitle>In the film Salt, Angelina Jolie's character creates a missile from handy household ingredients -- but could this happen in real life? Tune in as Marshall breaks down the science behind improvised explosives.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do artificial sweeteners work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-02-brainstuff-artificial-sweeteners-audible.mp3</link>
            <description>At many restaurants, a little container on the table will have regular sugar in addition to artificial sweeteners. But what exactly are artificial sweeteners, and how do they differ in comparison to regular sugar? Listen in to find out.</description>
            <pubDate>Fri, 02 Mar 2012 12:44:35 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-02-brainstuff-artificial-sweeteners-audible.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-03-02-brainstuff-artificial-sweeteners-audible.mp3' length='3243116' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, artificial sweeteners, nutrition</itunes:keywords>
            <itunes:duration>00:08:53</itunes:duration>
            <itunes:subtitle>At many restaurants, a little container on the table will have regular sugar in addition to artificial sweeteners. But what exactly are artificial sweeteners, and how do they differ in comparison to regular sugar? Listen in to find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is it possible to turn coal into oil?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-29-brainstuff-oil-from-coal.mp3</link>
            <description>As the demand for dwindling oil supplies rises, scientists across the world search for new ways to generate energy. In this episode, Marshall looks at a new attempt to stave off the looming fossil fuel crisis: Turning coal into oil. Tune in to learn more.</description>
            <pubDate>Wed, 29 Feb 2012 13:18:38 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-29-brainstuff-oil-from-coal.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-29-brainstuff-oil-from-coal.mp3' length='2098956' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, coal, oil, petroleum, energy crisis, peak oil</itunes:keywords>
            <itunes:duration>00:05:42</itunes:duration>
            <itunes:subtitle>As the demand for dwindling oil supplies rises, scientists across the world search for new ways to generate energy. In this episode, Marshall looks at a new attempt to stave off the looming fossil fuel crisis: Turning coal into oil. Tune in to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do 3D movies cause headaches?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-27-brainstuff-3d-headache.mp3</link>
            <description>Although 3-dimensional movies have become increasingly popular, numerous viewers have complained of headaches while watching these films. Why? Tune in as HowStuffWorks.com founder Marshall Brain breaks down the science behind 3D films.</description>
            <pubDate>Mon, 27 Feb 2012 13:31:03 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-27-brainstuff-3d-headache.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-27-brainstuff-3d-headache.mp3' length='1476089' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, 3d movies, 3d, tech, entertainment</itunes:keywords>
            <itunes:duration>00:03:58</itunes:duration>
            <itunes:subtitle>Although 3-dimensional movies have become increasingly popular, numerous viewers have complained of headaches while watching these films. Why? Tune in as HowStuffWorks.com founder Marshall Brain breaks down the science behind 3D films.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do human beings have eyebrows?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-24-brainstuff-eyebrows.mp3</link>
            <description>Eyebrows are prominent human features, but what purpose do they serve? Scientists think they help keep stuff out of our eyes and aid in nonverbal communication, among other things. Learn more about eyebrows in this episode.</description>
            <pubDate>Fri, 24 Feb 2012 11:22:39 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-24-brainstuff-eyebrows.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-24-brainstuff-eyebrows.mp3' length='940057' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, why do we have eyebrows, eyebrows, eyelashes</itunes:keywords>
            <itunes:duration>00:02:29</itunes:duration>
            <itunes:subtitle>Eyebrows are prominent human features, but what purpose do they serve? Scientists think they help keep stuff out of our eyes and aid in nonverbal communication, among other things. Learn more about eyebrows in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do thirty pounds of air in your tires hold up two tons of car?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-22-brainstuff-tire-pressure.mp3</link>
            <description>Cars are heavy machines, so how can a few small, pressurized tires support their weight? Marshall Brain explains how tire pressure and contact patches work in this episode.</description>
            <pubDate>Wed, 22 Feb 2012 14:31:32 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-22-brainstuff-tire-pressure.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-22-brainstuff-tire-pressure.mp3' length='1173310' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, tire pressure, cars, auto</itunes:keywords>
            <itunes:duration>00:03:08</itunes:duration>
            <itunes:subtitle>Cars are heavy machines, so how can a few small, pressurized tires support their weight? Marshall Brain explains how tire pressure and contact patches work in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Do you have a hidden savant inside your brain?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-20-brainstuff-hidden-savant.mp3</link>
            <description>Savant capabilities seem extraordinary, but what if they aren't? What if we all have amazing talents embedded in our brains? In this episode, Marshall discusses different techniques that have revealed savant-like qualities in ordinary people.</description>
            <pubDate>Mon, 20 Feb 2012 10:53:22 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-20-brainstuff-hidden-savant.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-20-brainstuff-hidden-savant.mp3' length='1961503' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, savant, brain, neurobiology, thought</itunes:keywords>
            <itunes:duration>00:05:08</itunes:duration>
            <itunes:subtitle>avant capabilities seem extraordinary, but what if they aren't? What if we all have amazing talents embedded in our brains? In this episode, Marshall discusses different techniques that have revealed savant-like qualities in ordinary people.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is superconductivity?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-15-brainstuff-suprconductors.mp3</link>
            <description>Superconductive materials have no electrical resistance, but why is superconductivity a big deal? Marshall Brain explains the potential benefits and implications of superconductive materials, as well as how they work, in this episode.</description>
            <pubDate>Wed, 15 Feb 2012 14:21:14 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-15-brainstuff-suprconductors.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-15-brainstuff-suprconductors.mp3' length='1957570' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, superconductivity, superconductors, electrical resistance, electrons, superconducting materials</itunes:keywords>
            <itunes:duration>00:05:19</itunes:duration>
            <itunes:subtitle>Superconductive materials have no electrical resistance, but why is superconductivity a big deal? Marshall Brain explains the potential benefits and implications of superconductive materials, as well as how they work, in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a digital signature?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-13-brainstuff-digital-signature.mp3</link>
            <description>A digital signature is a way to authenticate electronic documents. Find out what 'authentic' means in this context -- and how encryption is involved in the authentication process -- in this episode.</description>
            <pubDate>Mon, 13 Feb 2012 12:48:31 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-13-brainstuff-digital-signature.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-13-brainstuff-digital-signature.mp3' length='1914627' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, digital signature, authentication, encryption, checksum, digital certificates</itunes:keywords>
            <itunes:duration>00:05:12</itunes:duration>
            <itunes:subtitle>A digital signature is a way to authenticate electronic documents. Find out what 'authentic' means in this context -- and how encryption is involved in the authentication process -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>When you have an itch, what's happening under your skin?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-10-brainstuff-itching.mp3</link>
            <description>Skin covers our bodies, so it's very easy for this delicate organ to get irritated. In this episode, Marshall explains why our bodies respond to irritants with an itching sensation -- and why we're programmed to scratch.</description>
            <pubDate>Thu, 09 Feb 2012 09:25:45 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-10-brainstuff-itching.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-10-brainstuff-itching.mp3' length='1233644' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, itching, itch</itunes:keywords>
            <itunes:duration>00:03:18</itunes:duration>
            <itunes:subtitle>Skin covers our bodies, so it's very easy for this delicate organ to get irritated. In this episode, Marshall explains why our bodies respond to irritants with an itching sensation -- and why we're programmed to scratch.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why can biting on aluminum foil be painful?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-08-brainstuff-aluminum-foil-teeth.mp3</link>
            <description>When (dental) metal in your mouth comes in contact with aluminum foil, your teeth get a painful shock from the electricity produced. Marshall Brain explains how the voltaic effect plays out in your mouth in this episode.</description>
            <pubDate>Wed, 08 Feb 2012 11:36:08 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-08-brainstuff-aluminum-foil-teeth.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-08-brainstuff-aluminum-foil-teeth.mp3' length='954799' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, aluminum, aluminum foil, fillings, teeth</itunes:keywords>
            <itunes:duration>00:02:32</itunes:duration>
            <itunes:subtitle>When (dental) metal in your mouth comes in contact with aluminum foil, your teeth get a painful shock from the electricity produced. Marshall Brain explains how the voltaic effect plays out in your mouth in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is a popsicle called a quiescently frozen confection?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-06-brainstuff-popsicle.mp3</link>
            <description>Popsicles are also called &quot;quiescently frozen confections&quot; because of the way they're frozen. Learn more about how flavored ice treats are made -- and what distinguishes them from ice cream -- in this episode.</description>
            <pubDate>Mon, 06 Feb 2012 14:12:53 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-06-brainstuff-popsicle.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-06-brainstuff-popsicle.mp3' length='941177' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, popsicle, quiescently frozen confection, overrunning, ice cream</itunes:keywords>
            <itunes:duration>00:02:29</itunes:duration>
            <itunes:subtitle>Popsicles are also called &quot;quiescently frozen confections&quot; because of the way they're frozen. Learn more about how flavored ice treats are made -- and what distinguishes them from ice cream -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do people pull large objects with their teeth?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-03-brainstuff-teeth-pull.mp3</link>
            <description>Have you ever seen those folks that can pull a whole truck with their teeth? Tune in as Marshall Brain explains the physics behind pulling large objects with your teeth in this episode.</description>
            <pubDate>Fri, 03 Feb 2012 14:47:59 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-03-brainstuff-teeth-pull.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-03-brainstuff-teeth-pull.mp3' length='1586447' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, teeth pulling, jaw muscle, stunts, performance</itunes:keywords>
            <itunes:duration>00:04:17</itunes:duration>
            <itunes:subtitle>Have you ever seen those folks that can pull a whole truck with their teeth? Tune in as Marshall Brain explains the physics behind pulling large objects with your teeth in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do polymer crystals work, and why do they absorb so much water?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-01-brainstuff-polymer-crystals.mp3</link>
            <description>Polymer crystals are extremely absorbent, and that's why you'll often find them in disposable diapers. Marshall explains how polymer crystals are able to absorb large quantities of liquids -- and keep you cool and dry -- in this episode.</description>
            <pubDate>Wed, 01 Feb 2012 13:19:19 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-18-brainstuff-blood-types.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-02-01-brainstuff-polymer-crystals.mp3' length='964384' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, polymer crystal, chemistry, science</itunes:keywords>
            <itunes:duration>00:02:33</itunes:duration>
            <itunes:subtitle>Polymer crystals are extremely absorbent, and that's why you'll often find them in disposable diapers. Marshall explains how polymer crystals are able to absorb large quantities of liquids -- and keep you cool and dry -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>To maximize happiness, what should you spend money on?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-30-brainstuff-buying-happiness.mp3</link>
            <description>They say that money can't buy happiness, but it can definitely contribute to your well-being. So what exactly should you spend your money on to maximize your happiness? Stuff? Experiences? Marshall Brain investigates in this episode.</description>
            <pubDate>Mon, 30 Jan 2012 14:50:03 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-30-brainstuff-buying-happiness.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-30-brainstuff-buying-happiness.mp3' length='2116841' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, money, happiness, wealth, success</itunes:keywords>
            <itunes:duration>00:04:47</itunes:duration>
            <itunes:subtitle>They say that money can't buy happiness, but it can definitely contribute to your well-being. So what exactly should you spend your money on to maximize your happiness? Stuff? Experiences? Marshall Brain investigates in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does WikiLeaks work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-27-brainstuff-wikileaks.mp3</link>
            <description>WikiLeaks is a controversial &quot;not-for-profit media organization&quot; that disseminates secret, leaked information to the public. But how exactly does this group work? And why does it exist? Marshall Brain takes a look at WikiLeaks in this episode.</description>
            <pubDate>Fri, 27 Jan 2012 12:30:09 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-27-brainstuff-wikileaks.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-27-brainstuff-wikileaks.mp3' length='1759142' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, WikiLeaks, Julian Assange</itunes:keywords>
            <itunes:duration>00:04:46</itunes:duration>
            <itunes:subtitle>WikiLeaks is a controversial &quot;not-for-profit media organization&quot; that disseminates secret, leaked information to the public. But how exactly does this group work? And why does it exist? Marshall Brain takes a look at WikiLeaks in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is organic food more expensive than regular food?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-25-brainstuff-organic-food-prices.mp3</link>
            <description>You've probably noticed that organic foods cost significantly more than non-organic ones, but have you ever wondered why? In this episode, Marshall Brain explains how higher production costs and other factors lead to higher prices in the grocery store.</description>
            <pubDate>Wed, 25 Jan 2012 11:53:06 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-25-brainstuff-organic-food-prices.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-25-brainstuff-organic-food-prices.mp3' length='2018097' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, organic food, diet, nutrition, groceries</itunes:keywords>
            <itunes:duration>00:05:28</itunes:duration>
            <itunes:subtitle>You've probably noticed that organic foods cost significantly more than non-organic ones, but have you ever wondered why? In this episode, Marshall Brain explains how higher production costs and other factors lead to higher prices in the grocery store.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can water cut through steel?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-23-brainstuff-waterjet.mp3</link>
            <description>Waterjets are tools that use highly pressurized, focused streams of water to cut through metal and other solid materials. Learn more about waterjets in this episode.</description>
            <pubDate>Mon, 23 Jan 2012 13:17:52 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-23-brainstuff-waterjet.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-23-brainstuff-waterjet.mp3' length='1291768' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, waterjet, cutting steel with water</itunes:keywords>
            <itunes:duration>00:03:28</itunes:duration>
            <itunes:subtitle>Waterjets are tools that use highly pressurized, focused streams of water to cut through metal and other solid materials. Learn more about waterjets in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How valuable is exercise to your health?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-20-brainstuff-exercise-valuable.mp3</link>
            <description>We all know that exercise is an important way to safeguard your health. But how, exactly? In this episode, Marshall discusses the health benefits of exercise -- and how much we need each week in order to take advantage of these benefits.</description>
            <pubDate>Fri, 20 Jan 2012 14:54:05 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-20-brainstuff-exercise-valuable.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-20-brainstuff-exercise-valuable.mp3' length='1277983' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, health benefits of exercise, exercise valuable</itunes:keywords>
            <itunes:duration>00:03:25</itunes:duration>
            <itunes:subtitle>We all know that exercise is an important way to safeguard your health. But how, exactly? In this episode, Marshall discusses the health benefits of exercise -- and how much we need each week in order to take advantage of these benefits.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Are all blood types needed for donation?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-18-brainstuff-blood-types.mp3</link>
            <description>In this episode, Marshall explains how proteins determine your blood type -- and why blood types must match for blood transfusions to be successful.</description>
            <pubDate>Wed, 18 Jan 2012 11:34:57 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-18-brainstuff-blood-types.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-18-brainstuff-blood-types.mp3' length='1752889' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, blood types, transfusion, donation, plasma</itunes:keywords>
            <itunes:duration>00:04:45</itunes:duration>
            <itunes:subtitle>In this episode, Marshall explains how proteins determine your blood type -- and why blood types must match for blood transfusions to be successful.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is an IP address?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-16-brainstuff-ip-addresses.mp3</link>
            <description>Every computer that's connected to the Internet has its own unique &quot;address.&quot; Tune in as Marshall explains how IP addresses work ( and how many of them exist) in this episode.</description>
            <pubDate>Mon, 16 Jan 2012 09:01:54 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-16-brainstuff-ip-addresses.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-16-brainstuff-ip-addresses.mp3' length='1191447' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, ip address, internet, online, routing, web</itunes:keywords>
            <itunes:duration>00:03:11</itunes:duration>
            <itunes:subtitle>Every computer that's connected to the Internet has its own unique &quot;address.&quot; Tune in as Marshall explains how IP addresses work ( and how many of them exist) in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why can you hear the ocean in a seashell?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-13-brainstuff-seashell-sound.mp3</link>
            <description>There are various theories about why you can hear ocean-like sounds when you hold a seashell up to your ear. Marshall Brain explains what you're probably hearing in that seashell -- and why you don't need a shell to hear it -- in this episode.</description>
            <pubDate>Fri, 13 Jan 2012 12:14:39 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-13-brainstuff-seashell-sound.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-13-brainstuff-seashell-sound.mp3' length='1100717' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, hear the ocean in a seashell, seashell</itunes:keywords>
            <itunes:duration>00:02:56</itunes:duration>
            <itunes:subtitle>There are various theories about why you can hear ocean-like sounds when you hold a seashell up to your ear. Marshall Brain explains what you're probably hearing in that seashell -- and why you don't need a shell to hear it -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why shouldn't you go swimming right after a meal?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-11-brainstuff-swim-eat.mp3</link>
            <description>As children, many of us have been admonished not to go swimming for at least an hour after eating. But, as it turns out, there's biology behind this commonplace advice. Tune in to this episode to find out why you shouldn't swim right after you eat.</description>
            <pubDate>Wed, 11 Jan 2012 13:57:55 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-11-brainstuff-swim-eat.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-11-brainstuff-swim-eat.mp3' length='1385198' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, swimming, digestion, energy, anatomy, food</itunes:keywords>
            <itunes:duration>00:03:43</itunes:duration>
            <itunes:subtitle>As children, many of us have been admonished not to go swimming for at least an hour after eating. But, as it turns out, there's biology behind this commonplace advice. Tune in to this episode to find out why you shouldn't swim right after you eat.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can I recover a deleted file from my computer?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-09-brainstuff-delete-file.mp3</link>
            <description>In many cases, it's possible to recover files that have been deleted by using your computer's Recycle Bin. Marshall Brain reveals ways to recover deleted files -- and how to erase them permanently -- in this episode.</description>
            <pubDate>Mon, 09 Jan 2012 13:46:21 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-09-brainstuff-delete-file.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-09-brainstuff-delete-file.mp3' length='1348837' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, deleting files, memory, hard drive, recovery</itunes:keywords>
            <itunes:duration>00:03:37</itunes:duration>
            <itunes:subtitle>In many cases, it's possible to recover files that have been deleted by using your computer's Recycle Bin. Marshall Brain reveals ways to recover deleted files -- and how to erase them permanently -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can we eliminate fossil fuels?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-06-brainstuff-diy-biofuels.mp3</link>
            <description>It's no secret that fossil fuels have a detrimental effect on the environment, but do feasible alternatives exist? In this episode, Marshall takes a look at the possibilities of DIY biofuel.</description>
            <pubDate>Fri, 06 Jan 2012 11:32:40 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-06-brainstuff-diy-biofuels.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-06-brainstuff-diy-biofuels.mp3' length='3050490' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, biofuel, fossil fuel, petroleum, alternative energy,</itunes:keywords>
            <itunes:duration>00:08:21</itunes:duration>
            <itunes:subtitle>It's no secret that fossil fuels have a detrimental effect on the environment, but do feasible alternatives exist? In this episode, Marshall takes a look at the possibilities of DIY biofuel.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do batteries die but then come back to life?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-04-brainstuff-dead-battery.mp3</link>
            <description>Batteries -- particularly car batteries -- seem to go dead and then come back to life after a resting period. How does this self-recharging feature of batteries work? Find out in this episode of BrainStuff.</description>
            <pubDate>Wed, 04 Jan 2012 13:08:30 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-04-brainstuff-dead-battery.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, battery, car battery, battery life</itunes:keywords>
            <itunes:duration>00:02:56</itunes:duration>
            <itunes:subtitle>Batteries -- particularly car batteries -- seem to go dead and then come back to life after a resting period. How does this self-recharging feature of batteries work? Find out in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What are other ways to store energy besides batteries?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-02-brainstuff-storing-energy.mp3</link>
            <description>Batteries are a common way to store energy, but there are many others. Discover more energy storage techniques, from falling weights to fuel cells, in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 02 Jan 2012 09:27:11 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-02-brainstuff-storing-energy.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-02-brainstuff-storing-energy.mp3' length='1621873' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, storing energy, batteries, falling weight, fuel cells, antimatter</itunes:keywords>
            <itunes:duration>00:04:23</itunes:duration>
            <itunes:subtitle>Batteries are a common way to store energy, but there are many others. Discover more energy storage techniques, from falling weights to fuel cells, in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does fusion power work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-30-brainstuff-fusion-power.mp3</link>
            <description>Fusion reactors like the sun produce huge amounts of energy, so why aren't there fusion power plants everywhere? In this episode, Marshall explains the chemistry of fusion reactions and discusses how close fusion is to becoming a viable energy source.</description>
            <pubDate>Fri, 30 Dec 2011 09:36:17 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-30-brainstuff-fusion-power.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, fusion, nuclear power, fusion reactor</itunes:keywords>
            <itunes:duration>00:05:25</itunes:duration>
            <itunes:subtitle>Fusion reactors like the sun produce huge amounts of energy, so why aren't there fusion power plants everywhere? In this episode, Marshall explains the chemistry of fusion reactions and discusses how close fusion is to becoming a viable energy source.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Japan's Nuclear Problem</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-28-brainstuff-japan-nuclear-problem.mp3</link>
            <description>When the recent earthquake hit Japan, it seemed the country had withstood the worst of the blast -- until explosions occurred at a nuclear power plant. Is another disaster on the way? Tune in as Marshall explains the state of Japan's nuclear power plants.</description>
            <pubDate>Wed, 28 Dec 2011 13:17:15 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-28-brainstuff-japan-nuclear-problem.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-28-brainstuff-japan-nuclear-problem.mp3' length='3835876' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, japan, earthquake, nuclear power plant</itunes:keywords>
            <itunes:duration>00:10:32</itunes:duration>
            <itunes:subtitle>When the recent earthquake hit Japan, it seemed the country had withstood the worst of the blast -- until explosions occurred at a nuclear power plant. Is another disaster on the way? Tune in as Marshall explains the state of Japan's nuclear power plants.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How High-level Nuclear Waste Works</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-26-brainstuff-high-level-nuclear-waste.mp3</link>
            <description>What exactly is high-level nuclear waste, and how are we dealing with it today? In this episode, Marshall breaks down the techniques used to store high-level nuclear waste.</description>
            <pubDate>Mon, 26 Dec 2011 11:47:36 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-26-brainstuff-high-level-nuclear-waste.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-26-brainstuff-high-level-nuclear-waste.mp3' length='1851469' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, nuclear waste, radiation, nuclear power</itunes:keywords>
            <itunes:duration>00:05:01</itunes:duration>
            <itunes:subtitle>What exactly is high-level nuclear waste, and how are we dealing with it today? In this episode, Marshall breaks down the techniques used to store high-level nuclear waste.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What does a gigabyte of internet access really cost?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-23-brainstuff-internet-bandwidth-cost.mp3</link>
            <description>Internet service providers often tangle with customers who claim they're being ripped off -- but how much does a gigabyte of access actually cost? Join Marshall Brain as he breaks down the real cost of a gigabyte's worth of internet access.</description>
            <pubDate>Thu, 22 Dec 2011 22:50:04 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-23-brainstuff-internet-bandwidth-cost.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, bandwidth cost, internet, gigabyte, data,</itunes:keywords>
            <itunes:duration>00:09:04</itunes:duration>
            <itunes:subtitle>Internet service providers often tangle with customers who claim they're being ripped off -- but how much does a gigabyte of access actually cost? Join Marshall Brain as he breaks down the real cost of a gigabyte's worth of internet access.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Which 4G services are available in the U.S. today?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-21-brainstuff-4g-phone-systems-us.mp3</link>
            <description>If you have a smart phone, you may be interested in 4G service for the data you receive. But which services are available, and which one will suit your needs? Listen in as Marshall Brain breaks down the differences between 4G services.</description>
            <pubDate>Wed, 21 Dec 2011 10:20:07 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-21-brainstuff-4g-phone-systems-us.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, 4g, smart phone, iphone, cell, android</itunes:keywords>
            <itunes:duration>00:02:49</itunes:duration>
            <itunes:subtitle>If you have a smart phone, you may be interested in 4G service for the data you receive. But which services are available, and which one will suit your needs? Listen in as Marshall Brain breaks down the differences between 4G services.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is a cell phone called a cell phone?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-19-brainstuff-cell-phones.mp3</link>
            <description>Cellular phone systems divide areas of coverage into &quot;cells,&quot; hence the name. But how do they actually work? Listen in as Marshall Brain breaks down the nuts and bolts of cell phone systems in this episode.</description>
            <pubDate>Mon, 19 Dec 2011 14:53:54 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-19-brainstuff-cell-phones.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, cell phones, mobile telephone switching office</itunes:keywords>
            <itunes:duration>00:05:12</itunes:duration>
            <itunes:subtitle>Cellular phone systems divide areas of coverage into &quot;cells,&quot; hence the name. But how do they actually work? Listen in as Marshall Brain breaks down the nuts and bolts of cell phone systems in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What does a modern smart house look like?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-16-brainstuff-smart-house.mp3</link>
            <description>What makes a &quot;smart&quot; house so smart? These high-tech houses intelligently use resources and are responsive to the needs and habits of their occupants. Tune in to learn more.</description>
            <pubDate>Fri, 16 Dec 2011 12:44:46 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-16-brainstuff-smart-house.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-16-brainstuff-smart-house.mp3' length='1923574' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, smart houses, smart systems, green houses, resources</itunes:keywords>
            <itunes:duration>00:05:13</itunes:duration>
            <itunes:subtitle>What makes a &quot;smart&quot; house so smart? These high-tech houses intelligently use resources and are responsive to the needs and habits of their occupants. Tune in to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does the oxygen sensor in a car work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-14-brainstuff-oxygen-sensor.mp3</link>
            <description>All new cars sport oxygen sensors that are designed to cut down emissions and keep the engine running smoothly. Find out exactly how these sensors work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 14 Dec 2011 11:00:40 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-14-brainstuff-oxygen-sensor.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-14-brainstuff-oxygen-sensor.mp3' length='940367' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, oxygen sensor, automobiles, cars</itunes:keywords>
            <itunes:duration>00:02:29</itunes:duration>
            <itunes:subtitle>All new cars sport oxygen sensors that are designed to cut down emissions and keep the engine running smoothly. Find out exactly how these sensors work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do motion sensors work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-12-brainstuff-motion-sensors.mp3</link>
            <description>There are many kinds of motion sensors, from active to passive systems. Get the scoop on how myriad motion sensing systems work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 12 Dec 2011 15:52:46 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-12-brainstuff-motion-sensors.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-12-brainstuff-motion-sensors.mp3' length='1001803' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, motion sensors, alarm, security,</itunes:keywords>
            <itunes:duration>00:02:39</itunes:duration>
            <itunes:subtitle>There are many kinds of motion sensors, from active to passive systems. Get the scoop on how myriad motion sensing systems work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a speedometer in an airplane work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-09-brainstuff-air-speed.mp3</link>
            <description>Most people are familiar with speedometers in cars, but do you know how air speed is determined? In this episode, Marshall explains how devices called pitot tubes gauge the speed of moving aircraft.</description>
            <pubDate>Fri, 09 Dec 2011 15:48:06 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-09-brainstuff-air-speed.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-09-brainstuff-air-speed.mp3' length='1494907' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, marshall, air speed, airplane, speedometer, aircraft</itunes:keywords>
            <itunes:duration>00:04:02</itunes:duration>
            <itunes:subtitle>Most people are familiar with speedometers in cars, but do you know how air speed is determined? In this episode, Marshall explains how devices called pitot tubes gauge the speed of moving aircraft.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why does lettuce stored in a bag stay fresh longer?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-07-brainstuff-map.mp3</link>
            <description>Many foods you'll find at the grocery store -- like lettuce, for example -- are stored in special plastic packaging called MAP that helps them stay fresh longer. Find out what MAP is, and how it keeps food fresh longer, in this episode of BrainStuff.</description>
            <pubDate>Wed, 07 Dec 2011 13:14:08 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-07-brainstuff-map.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-07-brainstuff-map.mp3' length='893994' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, map, lettuce, stay fresh, packaging</itunes:keywords>
            <itunes:duration>00:02:21</itunes:duration>
            <itunes:subtitle>Many foods you'll find at the grocery store -- like lettuce, for example -- are stored in special plastic packaging called MAP that helps them stay fresh longer. Find out what MAP is, and how it keeps food fresh longer, in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do we measure sea level?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-05-brainstuff-sea-level-audible.mp3</link>
            <description>Sea level is an important measurement, but it's also a complicated one. Find out why in this episode of BrainStuff.</description>
            <pubDate>Mon, 05 Dec 2011 13:49:25 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-05-brainstuff-sea-level-audible.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-05-brainstuff-sea-level-audible.mp3' length='1850679' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, sea level, measuring the ocean</itunes:keywords>
            <itunes:duration>00:05:00</itunes:duration>
            <itunes:subtitle>Sea level is an important measurement, but it's also a complicated one. Find out why in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why can I play some DVDs, but not others?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-02-brainstuff-dvd-regions.mp3</link>
            <description>Film studios use regional code protection in DVD technology to protect content and to control worldwide release dates. Tune as Marshall Brain breaks down the concept of region codes in this podcast.</description>
            <pubDate>Fri, 02 Dec 2011 11:21:31 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-02-brainstuff-dvd-regions.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-12-02-brainstuff-dvd-regions.mp3' length='871884' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, marshall, dvd, region, electronics, dvd player</itunes:keywords>
            <itunes:duration>00:02:19</itunes:duration>
            <itunes:subtitle>Film studios use regional code protection in DVD technology to protect content and to control worldwide release dates. Tune as Marshall Brain breaks down the concept of region codes in this podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do CD-R discs work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-30-brainstuff-cd-r-disk-audible.mp3</link>
            <description>Unlike a regular CD, a CD-R has a special dye layer that allows you to imprint data on it. Discover the mechanics of CD-R discs in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 30 Nov 2011 14:41:35 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-30-brainstuff-cd-r-disk-audible.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, cd, cd-r, cd-rw, disc, recording</itunes:keywords>
            <itunes:duration>00:03:24</itunes:duration>
            <itunes:subtitle>Unlike a regular CD, a CD-R has a special dye layer that allows you to imprint data on it. Discover the mechanics of CD-R discs in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is the sound on vinyl records better than on CDs?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-28-brainstuff-cd-vs-vinyl.mp3</link>
            <description>The sound quality of vinyl records is sometimes better than that of CDs and DVDs -- and sometimes worse. Learn more about the difference between the sound quality of records, CDs and DVDs in this episode.</description>
            <pubDate>Mon, 28 Nov 2011 12:09:55 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-28-brainstuff-cd-vs-vinyl.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-28-brainstuff-cd-vs-vinyl.mp3' length='1144767' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, vinyl records vs cds, analog, digital</itunes:keywords>
            <itunes:duration>00:03:03</itunes:duration>
            <itunes:subtitle>The sound quality of vinyl records is sometimes better than that of CDs and DVDs -- and sometimes worse. Learn more about the difference between the sound quality of records, CDs and DVDs in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is cotton more absorbent than nylon?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-25-brainstuff-cotton-nylon.mp3</link>
            <description>When water comes in contact with the complex molecules that make up cotton and nylon, it causes a different action in each material -- but why? Listen in as Marshall Brain breaks down the science behind water absorption in this podcast.</description>
            <pubDate>Fri, 25 Nov 2011 17:46:32 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-25-brainstuff-cotton-nylon.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, cotton, nylon, fabric, chemistry</itunes:keywords>
            <itunes:duration>00:03:29</itunes:duration>
            <itunes:subtitle>When water comes in contact with the complex molecules that make up cotton and nylon, it causes a different action in each material -- but why? Listen in as Marshall Brain breaks down the science behind water absorption in this podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Where does cork come from?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-23-brainstuff-cork.mp3</link>
            <description>Most cork comes from special trees that grow in places near the Mediterranean Sea. Learn more about cork oak trees, cork properties, cork products and cork processing in this episode.</description>
            <pubDate>Wed, 23 Nov 2011 11:12:53 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-23-brainstuff-cork.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-23-brainstuff-cork.mp3' length='1302569' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, cork, trees, wood</itunes:keywords>
            <itunes:duration>00:03:30</itunes:duration>
            <itunes:subtitle>Most cork comes from special trees that grow in places near the Mediterranean Sea. Learn more about cork oak trees, cork properties, cork products and cork processing in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is the difference between hardwood and softwood?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-21-brainstuff-hardwood-vs-softwood.mp3</link>
            <description>When it comes to differentiating between hardwoods and softwoods, it's not a matter of hardness or density -- it's all about plant reproduction. Marshall explains what angiosperms and gymnosperms are in this episode.</description>
            <pubDate>Mon, 21 Nov 2011 14:21:23 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-21-brainstuff-hardwood-vs-softwood.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-21-brainstuff-hardwood-vs-softwood.mp3' length='1011237' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, hardwood, softwood, timber, wood</itunes:keywords>
            <itunes:duration>00:02:41</itunes:duration>
            <itunes:subtitle>When it comes to differentiating between hardwoods and softwoods, it's not a matter of hardness or density -- it's all about plant reproduction. Marshall explains what angiosperms and gymnosperms are in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What does Pez mean?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-18-brainstuff-pez.mp3</link>
            <description>Today, Pez candy dispensers are a sweet treat for children and a novelty for adults. Originally, however, they were created to help adults quit smoking. Learn more about the fascinating history of Pez in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 18 Nov 2011 12:02:16 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-18-brainstuff-pez.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-18-brainstuff-pez.mp3' length='1192698' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, pez, candy, smoking, invention</itunes:keywords>
            <itunes:duration>00:03:11</itunes:duration>
            <itunes:subtitle>Today, Pez candy dispensers are a sweet treat for children and a novelty for adults. Originally, however, they were created to help adults quit smoking. Learn more about the fascinating history of Pez in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is chocolate poisonous to dogs?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-16-brainstuff-chocolate-poisoning.mp3</link>
            <description>Under the right conditions, chocolate can indeed be deadly for dogs. Tune in to learn more about the compound in chocolate that makes it dangerous for dogs (and how much is too much) in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 16 Nov 2011 14:35:58 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-16-brainstuff-chocolate-poisoning.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-16-brainstuff-chocolate-poisoning.mp3' length='887391' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, chocolate, poisoning, chocolate and pets</itunes:keywords>
            <itunes:duration>00:02:20</itunes:duration>
            <itunes:subtitle>Under the right conditions, chocolate can indeed be deadly for dogs. Tune in to learn more about the compound in chocolate that makes it dangerous for dogs (and how much is too much) in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can there be seedless grapes?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-14-brainstuff-seedless-grapes.mp3</link>
            <description>Seedless grapes are the most common kind on the market, but have you ever wondered how a grape can be seedless? How does it grow? Discover how seedless grapes accidentally came about -- and how they grow -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 14 Nov 2011 15:02:34 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-14-brainstuff-seedless-grapes.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-14-brainstuff-seedless-grapes.mp3' length='710910' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, seedless grapes, grape vine cuttings, white Thompson's seedless grapes</itunes:keywords>
            <itunes:duration>00:01:51</itunes:duration>
            <itunes:subtitle>Seedless grapes are the most common kind on the market, but have you ever wondered how a grape can be seedless? How does it grow? Discover how seedless grapes accidentally came about -- and how they grow -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why doesn't gasoline burn cleanly?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-11-brainstuff-gas-pollution.mp3</link>
            <description>Since gasoline is a liquid formed of carbon and hydrogen, it's possible to trace the chemical reactions in car exhaust and understand what types of pollutants are created by a car's engine. Tune in and learn more about the science behind burning gas.</description>
            <pubDate>Fri, 11 Nov 2011 12:30:08 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-11-brainstuff-gas-pollution.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-11-brainstuff-gas-pollution.mp3' length='959178' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, gas pollution, fuel, gasoline</itunes:keywords>
            <itunes:duration>00:02:32</itunes:duration>
            <itunes:subtitle>Since gasoline is a liquid formed of carbon and hydrogen, it's possible to trace the chemical reactions in car exhaust and understand what types of pollutants are created by a car's engine. Tune in and learn more about the science behind burning gas.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does an oxygen canister on an airplane work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-09-brainstuff-oxygen-canister.mp3</link>
            <description>When you think of storing oxygen, metal tanks full of gas might come to mind. There's also a chemical method -- tune in to this podcast from HowStuffWorks.com to learn about how oxygen canisters work.</description>
            <pubDate>Wed, 09 Nov 2011 14:19:01 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-09-brainstuff-oxygen-canister.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-09-brainstuff-oxygen-canister.mp3' length='947281' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, oxygen canister, chemical, storage</itunes:keywords>
            <itunes:duration>00:02:30</itunes:duration>
            <itunes:subtitle>When you think of storing oxygen, metal tanks full of gas might come to mind. There's also a chemical method -- tune in to this podcast from HowStuffWorks.com to learn about how oxygen canisters work.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does nitrous oxide help an engine perform better?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-07-brainstuff-nitrous.mp3</link>
            <description>Nitrous oxide boosts engine power in two significant ways. Find out exactly how nitrous works its magic in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 07 Nov 2011 13:44:34 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-07-brainstuff-nitrous.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-07-brainstuff-nitrous.mp3' length='801209' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, nitrous oxide, engine, racing, auto, car</itunes:keywords>
            <itunes:duration>00:02:06</itunes:duration>
            <itunes:subtitle>Nitrous oxide boosts engine power in two significant ways. Find out exactly how nitrous works its magic in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do batteries die but then come back to life?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-04-brainstuff-dead-battery.mp3</link>
            <description>Batteries, particularly car batteries, seem to go dead and then come back to life after a resting period. How does this self-recharging feature of batteries work? Find out in this episode of BrainStuff.</description>
            <pubDate>Fri, 04 Nov 2011 10:40:35 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-04-brainstuff-dead-battery.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2012-01-04-brainstuff-dead-battery.mp3' length='1099784' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, batteries die then come back to life, self-recharging batteries</itunes:keywords>
            <itunes:duration>00:02:56</itunes:duration>
            <itunes:subtitle>Batteries, particularly car batteries, seem to go dead and then come back to life after a resting period. How does this self-recharging feature of batteries work? Find out in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why does your computer need a battery?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-02-brainstuff-computer-battery.mp3</link>
            <description>Computers have a small battery that's important because it keeps the machine's clock running -- and sometimes, your computer. Get the goods on computer batteries in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 02 Nov 2011 11:18:57 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-02-brainstuff-computer-battery.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-11-02-brainstuff-computer-battery.mp3' length='1005889' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, computer battery, electronics</itunes:keywords>
            <itunes:duration>00:02:40</itunes:duration>
            <itunes:subtitle>Computers have a small battery that's important because it keeps the machine's clock running -- and sometimes, your computer. Get the goods on computer batteries in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How did the moon get there?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-31-brainstuff-how-did-moon-get-there.mp3</link>
            <description>The moon has orbited over human civilization since the dawn of time, but it took us thousands of years to figure out how it actually got there. Tune in as Marshall Brain examines the formation of the moon.</description>
            <pubDate>Mon, 31 Oct 2011 11:57:03 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-31-brainstuff-how-did-moon-get-there.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-31-brainstuff-how-did-moon-get-there.mp3' length='2088131' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, moon, astronomy, lunar origin, space, orbit</itunes:keywords>
            <itunes:duration>00:05:41</itunes:duration>
            <itunes:subtitle>The moon has orbited over human civilization since the dawn of time, but it took us thousands of years to figure out how it actually got there. Tune in as Marshall Brain examines the formation of the moon.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How many calories does a person need daily?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-28-brainstuff-calories.mp3</link>
            <description>The amount of calories a person needs to consume on a daily basis varies by individual. Discover the three factors that can help you determine your daily caloric needs in this episode of BrainStuff.</description>
            <pubDate>Fri, 28 Oct 2011 13:24:24 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-28-brainstuff-calories.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-28-brainstuff-calories.mp3' length='1323125' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, calories, caloric intake, nutrition</itunes:keywords>
            <itunes:duration>00:03:33</itunes:duration>
            <itunes:subtitle>The amount of calories a person needs to consume on a daily basis varies by individual. Discover the three factors that can help you determine your daily caloric needs in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is the battery light on your car's dashboard for?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-26-brainstuff-battery-light.mp3</link>
            <description>Cars rely on batteries to keep their electrical parts running and alternators to keep their batteries alive. Battery lights come into play when there's a charging problem. Find out more about battery lights in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 26 Oct 2011 11:44:14 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-26-brainstuff-battery-light.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-26-brainstuff-battery-light.mp3' length='876286' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, car battery, warning lights, dashboard, auto</itunes:keywords>
            <itunes:duration>00:02:19</itunes:duration>
            <itunes:subtitle>Cars rely on batteries to keep their electrical parts running and alternators to keep their batteries alive. Battery lights come into play when there's a charging problem. Find out more about battery lights in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do self-driving cars work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-24-brainstuff-self-driving-cars.mp3</link>
            <description>Self-driving cars seem like the stuff of science fiction, but they're closer to becoming reality than you might think. In this episode, Marshall breaks down the technology behind experimental self-driving cars.</description>
            <pubDate>Mon, 24 Oct 2011 12:43:34 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-24-brainstuff-self-driving-cars.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-24-brainstuff-self-driving-cars.mp3' length='2252706' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, self-driving car, automonous vehicle, google car</itunes:keywords>
            <itunes:duration>00:06:08</itunes:duration>
            <itunes:subtitle>Self-driving cars seem like the stuff of science fiction, but they're closer to becoming reality than you might think. In this episode, Marshall breaks down the technology behind experimental self-driving cars.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do photochromatic lenses work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-21-brainstuff-tranisition-lenses.mp3</link>
            <description>Photochromatic lenses darken when exposed to the sun. Discover where these lenses came from, how they work and why they're commonly referred to as &quot;transition&quot; lenses in this episode of BrainStuff.</description>
            <pubDate>Fri, 21 Oct 2011 13:03:27 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-21-brainstuff-tranisition-lenses.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-21-brainstuff-tranisition-lenses.mp3' length='1708527' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff,  marshall, transition lenses, photochromatic</itunes:keywords>
            <itunes:duration>00:03:37</itunes:duration>
            <itunes:subtitle>Photochromatic lenses darken when exposed to the sun. Discover where these lenses came from, how they work and why they're commonly referred to as &quot;transition&quot; lenses in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why does the moon look bigger when it's near the horizon?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-19-brainstuff-moon-illusion.mp3</link>
            <description>When the moon is near the horizon, it appears to be much bigger than when it's high in the sky. But is it really larger? Tune in to find out.</description>
            <pubDate>Wed, 19 Oct 2011 15:13:50 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-19-brainstuff-moon-illusion.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-19-brainstuff-moon-illusion.mp3' length='1553696' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, moon, illusion, perception, astronomy</itunes:keywords>
            <itunes:duration>00:03:10</itunes:duration>
            <itunes:subtitle>When the moon is near the horizon, it appears to be much bigger than when it's high in the sky. But is it really larger? Tune in to find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do the Northern Lights work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-17-brainstuff-northern-lights.mp3</link>
            <description>The Northern Lights, also known as the aurora borealis, occur when charged electrons from the sun interact with the Earth's magnetic field. Learn more about auroras and solar activity in this episode.</description>
            <pubDate>Mon, 17 Oct 2011 12:17:22 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-17-brainstuff-northern-lights.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-17-brainstuff-northern-lights.mp3' length='1536587' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, aurora borealis, northern lights</itunes:keywords>
            <itunes:duration>00:03:08</itunes:duration>
            <itunes:subtitle>The Northern Lights, also known as the aurora borealis, occur when charged electrons from the sun interact with the Earth's magnetic field. Learn more about auroras and solar activity in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What does &quot;not guilty by reason of insanity&quot; mean?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-14-brainstuff-insanity-plea.mp3</link>
            <description>Claiming the &quot;insanity defense&quot; in fictional courts of law is common and seems pretty straightforward; in real life, it's much more rare and complex. Discover the legal definition of &quot;insanity&quot; -- and how it relates to mental illness -- in this episode.</description>
            <pubDate>Fri, 14 Oct 2011 13:20:32 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-14-brainstuff-insanity-plea.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
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            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff,  insanity plea, legal, court, trial,</itunes:keywords>
            <itunes:duration>00:05:14</itunes:duration>
            <itunes:subtitle>Claiming the &quot;insanity defense&quot; in fictional courts of law is common and seems pretty straightforward; in real life, it's much more rare and complex. Discover the legal definition of &quot;insanity&quot; -- and how it relates to mental illness -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What constitutes a person's IQ?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-12-brainstuff-iq.mp3</link>
            <description>Your IQ, or intelligence quotient, is a reflection of how well you perform on a specific test that measures cognitive abilities. Learn more about IQ tests in this episode.</description>
            <pubDate>Wed, 12 Oct 2011 13:17:00 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-12-brainstuff-iq.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-12-brainstuff-iq.mp3' length='2110549' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, intelligence quotient, bidet, iq test</itunes:keywords>
            <itunes:duration>00:05:44</itunes:duration>
            <itunes:subtitle>Your IQ, or intelligence quotient, is a reflection of how well you perform on a specific test that measures cognitive abilities. Learn more about IQ tests in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How the Nobel Prize Works</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-10-brainstuff-nobel-prize.mp3</link>
            <description>Nobel Prizes are highly prestigious, valuable awards that have been given out to visionaries and pioneers in select fields since 1901. Tune in to find out more about the Nobel Prize in this episode of BrainStuff.</description>
            <pubDate>Mon, 10 Oct 2011 14:53:42 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-10-brainstuff-nobel-prize.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-10-brainstuff-nobel-prize.mp3' length='733947' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, nobel prize, philanthropy, alfred nobel</itunes:keywords>
            <itunes:duration>00:01:55</itunes:duration>
            <itunes:subtitle>Nobel Prizes are highly prestigious, valuable awards that have been given out to visionaries and pioneers in select fields since 1901. Tune in to find out more about the Nobel Prize in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do British royal titles work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-07-brainstuff-royal-titles.mp3</link>
            <description>In this episode of BrainStuff, Marshall Brain gives a detailed explanation of how British royal titles work.</description>
            <pubDate>Fri, 07 Oct 2011 13:23:01 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-07-brainstuff-royal-titles.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-07-brainstuff-royal-titles.mp3' length='1971213' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff,  royal titles, peerage, aristocracy, oligarchy, oppression</itunes:keywords>
            <itunes:duration>00:05:21</itunes:duration>
            <itunes:subtitle>In this episode of BrainStuff, Marshall Brain gives a detailed explanation of how British royal titles work.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do plastics work? What is actually in a plastic?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-05-brainstuff-plastics.mp3</link>
            <description>Plastics have become so ubiquitous that we often take them for granted, but have you ever wondered where these popular materials come from? In this episode, Marshall explains the composition of plastic.</description>
            <pubDate>Wed, 05 Oct 2011 11:06:58 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-05-brainstuff-plastics.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-05-brainstuff-plastics.mp3' length='2026842' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, plastics, plastic, petrochemical, chemistry</itunes:keywords>
            <itunes:duration>00:05:03</itunes:duration>
            <itunes:subtitle>Plastics have become so ubiquitous that we often take them for granted, but have you ever wondered where these popular materials come from? In this episode, Marshall explains the composition of plastic.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do they include jokers in a deck of playing cards?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-03-brainstuff-joker.mp3</link>
            <description>The joker is an obscure and (according to some) useless addition to a deck of modern playing cards -- but it was originally a powerful card. Discover the history of the joker card and the modern card deck in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 03 Oct 2011 09:56:51 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-03-brainstuff-joker.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-10-03-brainstuff-joker.mp3' length='684121' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, joker, card, playing card</itunes:keywords>
            <itunes:duration>00:01:46</itunes:duration>
            <itunes:subtitle>The joker is an obscure and (according to some) useless addition to a deck of modern playing cards -- but it was originally a powerful card. Discover the history of the joker card and the modern card deck in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is market capitalization?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-30-brainstuff-stock-capitalization.mp3</link>
            <description>If all the money in the US only totals 8 trillion dollars, how can the New York Stock Exchange have stocks valued at 26 trillion dollars? Tune in as Marshall Brain breaks down the practice of stock capitalization in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 30 Sep 2011 16:06:16 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-30-brainstuff-stock-capitalization.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-30-brainstuff-stock-capitalization.mp3' length='1063246' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, computer, turn off computer, electronics</itunes:keywords>
            <itunes:duration>00:02:50</itunes:duration>
            <itunes:subtitle>If all the money in the US only totals 8 trillion dollars, how can the New York Stock Exchange have stocks valued at 26 trillion dollars? Tune in as Marshall Brain breaks down the practice of stock capitalization in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is dynamite? How does it work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-28-brainstuff-dynamite.mp3</link>
            <description>Dynamite is a type of chemical explosive. Discover how explosives from gasoline to dynamite work in this episode of BrainStuff.</description>
            <pubDate>Wed, 28 Sep 2011 13:02:45 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-28-brainstuff-dynamite.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-28-brainstuff-dynamite.mp3' length='902755' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, dynamite, explosive, nitroglycerin</itunes:keywords>
            <itunes:duration>00:02:22</itunes:duration>
            <itunes:subtitle>Dynamite is a type of chemical explosive. Discover how explosives from gasoline to dynamite work in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is dry ice dangerous?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-26-brainstuff-dry-ice-dangerous.mp3</link>
            <description>Dry ice is different from regular ice in several ways. Find out what makes dry ice so unique -- and why it's so good for transporting perishables over long distances -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 26 Sep 2011 15:37:38 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-26-brainstuff-dry-ice-dangerous.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-26-brainstuff-dry-ice-dangerous.mp3' length='644288' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, dry ice, danger, health</itunes:keywords>
            <itunes:duration>00:01:39</itunes:duration>
            <itunes:subtitle>Dry ice is different from regular ice in several ways. Find out what makes dry ice so unique -- and why it's so good for transporting perishables over long distances -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do one-way mirrors work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-23-brainstuff-oneway-mirror.mp3</link>
            <description>One-way mirrors are ubiquitous in crime dramas, but how do they work? Discover the secret behind one-way mirrors in this episode of BrainStuff.</description>
            <pubDate>Fri, 23 Sep 2011 13:35:16 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-23-brainstuff-oneway-mirror.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-23-brainstuff-oneway-mirror.mp3' length='1135656' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff,  one-way mirror, mirrors</itunes:keywords>
            <itunes:duration>00:03:01</itunes:duration>
            <itunes:subtitle>One-way mirrors are ubiquitous in crime dramas, but how do they work? Discover the secret behind one-way mirrors in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What would happen if the polar ice caps melted?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-21-brainstuff-ice-caps.mp3</link>
            <description>Learn more about melting ice caps, global warming and rising sea levels in this episode of BrainStuff.</description>
            <pubDate>Wed, 21 Sep 2011 14:11:39 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-21-brainstuff-ice-caps.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-21-brainstuff-ice-caps.mp3' length='1580488' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, ice caps, ocean rise, climate change, polar</itunes:keywords>
            <itunes:duration>00:02:27</itunes:duration>
            <itunes:subtitle>Learn more about melting ice caps, global warming and rising sea levels in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What makes your knuckles pop?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-19-brainstuff-knuckle-popping.mp3</link>
            <description>Learn more about the anatomy (and chemistry) behind that popping sound your knuckles make when you crack them in this episode of BrainStuff.</description>
            <pubDate>Mon, 19 Sep 2011 15:29:44 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-19-brainstuff-knuckle-popping.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-19-brainstuff-knuckle-popping.mp3' length='1297720' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, knuckle popping, anatomy, chemical, physiology</itunes:keywords>
            <itunes:duration>00:03:29</itunes:duration>
            <itunes:subtitle>Learn more about the anatomy (and chemistry) behind that popping sound your knuckles make when you crack them in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Should you turn your computer off when it's not in use?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-16-brainstuff-turn-computer-off.mp3</link>
            <description>When it comes to the question of whether or not you should turn off your computer when you're not using it, there's no simple answer. Tune in to get Marshall's thorough take on the topic in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 16 Sep 2011 13:06:39 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-16-brainstuff-turn-computer-off.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-16-brainstuff-turn-computer-off.mp3' length='1233485' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, computer, turn off computer, electronics</itunes:keywords>
            <itunes:duration>00:03:18</itunes:duration>
            <itunes:subtitle>When it comes to the question of whether or not you should turn off your computer when you're not using it, there's no simple answer. Tune in to get Marshall's thorough take on the topic in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How much sugar do they really put in soda?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-14-brainstuff-sugar-in-soda.mp3</link>
            <description>Sodas and soft drinks contain a surprising amount of sugar -- more than you might expect. Tune in as Marshall Brain reveals how much sugar is in soda in this episode of BrainStuff.</description>
            <pubDate>Wed, 14 Sep 2011 09:53:29 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-14-brainstuff-sugar-in-soda.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-14-brainstuff-sugar-in-soda.mp3' length='927056' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, sugar, soda, nutrition, pop, cola</itunes:keywords>
            <itunes:duration>00:02:27</itunes:duration>
            <itunes:subtitle>Sodas and soft drinks contain a surprising amount of sugar -- more than you might expect. Tune in as Marshall Brain reveals how much sugar is in soda in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why doesn't paper money disintegrate in the washing machine?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-12-brainstuff-paper-money.mp3</link>
            <description>Normal paper is made of cellulose from trees, but paper money is made from cotton and linen fibers. Learn how this makes paper money more water-resistant in this podcast from HowStuffWorks.</description>
            <pubDate>Mon, 12 Sep 2011 12:01:51 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-12-brainstuff-paper-money.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-12-brainstuff-paper-money.mp3' length='616738' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, paper money, printing, federal mint, currency</itunes:keywords>
            <itunes:duration>00:01:35</itunes:duration>
            <itunes:subtitle>Normal paper is made of cellulose from trees, but paper money is made from cotton and linen fibers. Learn how this makes paper money more water-resistant in this podcast from HowStuffWorks.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why can't a couch potato run a marathon?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-09-brainstuff-athletes.mp3</link>
            <description>Intuitively, it makes sense that a trained athlete can run a marathon easily, while a &quot;couch potato&quot; can barely run a mile. But what's the biology behind it? Find out how fit and unfit bodies respond to exercise in this episode.</description>
            <pubDate>Fri, 09 Sep 2011 14:14:45 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-09-brainstuff-athletes.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-09-brainstuff-athletes.mp3' length='1517630' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, athlete, athletic, marathon, couch potato</itunes:keywords>
            <itunes:duration>00:04:05</itunes:duration>
            <itunes:subtitle>Intuitively, it makes sense that a trained athlete can run a marathon easily, while a &quot;couch potato&quot; can barely run a mile. But what's the biology behind it? Find out how fit and unfit bodies respond to exercise in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is chewing gum made of?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-07-brainstuff-gum.mp3</link>
            <description>Up until World War II, chewing gum was made of a substance called chicle. Check out this HowStuffWorks podcast to learn more about the ingredients of modern chewing gum.</description>
            <pubDate>Wed, 07 Sep 2011 12:01:31 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-07-brainstuff-gum.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-07-brainstuff-gum.mp3' length='686611' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, gum, ingredients, food</itunes:keywords>
            <itunes:duration>00:01:47</itunes:duration>
            <itunes:subtitle>Up until World War II, chewing gum was made of a substance called chicle. Check out this HowStuffWorks podcast to learn more about the ingredients of modern chewing gum.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can a car get 100 MPG?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-05-brainstuff-car-get-100-mpg.mp3</link>
            <description>Created in the 1980s, the Avion is a car that can get more than 100 miles per gallon. In this episode, Marshall Brain talks about the factors that make the Avion so efficient -- and how the same techniques could be applied to production vehicles.</description>
            <pubDate>Mon, 05 Sep 2011 15:23:26 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-05-brainstuff-car-get-100-mpg.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-05-brainstuff-car-get-100-mpg.mp3' length='1817920' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, avion, 100 mpg, fuel efficiency</itunes:keywords>
            <itunes:duration>00:04:55</itunes:duration>
            <itunes:subtitle>Created in the 1980s, the Avion is a car that can get more than 100 miles per gallon. In this episode, Marshall Brain talks about the factors that make the Avion so efficient -- and how the same techniques could be applied to production vehicles.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Jelly, Jam  and Preserves Work</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-02-brainstuff-jelly.mp3</link>
            <description>Jam, jelly, and preserves are all made from fruit mixed with sugar and pectin. Jell-O, on the other hand, is completely different. Take a look at our HowStuffWorks article to learn more.</description>
            <pubDate>Fri, 02 Sep 2011 12:16:25 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-02-brainstuff-jelly.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-09-02-brainstuff-jelly.mp3' length='684463' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, jelly, jam, preserves, jello</itunes:keywords>
            <itunes:duration>00:01:47</itunes:duration>
            <itunes:subtitle>Jam, jelly, and preserves are all made from fruit mixed with sugar and pectin. Jell-O, on the other hand, is completely different. Take a look at our HowStuffWorks article to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do neon and fluorescent lights differ?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-31-brainstuff-neon.mp3</link>
            <description>Neon and fluorescent lights differ in several ways, including bulb shape, color of light emitted and substances used to produce that light. Find out how neon and fluorescent lights work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 31 Aug 2011 11:38:28 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-31-brainstuff-neon.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-31-brainstuff-neon.mp3' length='784898' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, light, neon, fluorescent</itunes:keywords>
            <itunes:duration>00:02:03</itunes:duration>
            <itunes:subtitle>Neon and fluorescent lights differ in several ways, including bulb shape, color of light emitted and substances used to produce that light. Find out how neon and fluorescent lights work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do hopping cars work?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-29-brainstuff-lowrider.mp3</link>
            <description>Lowriders are vehicles that ride very low to the ground and are often equipped with hydraulics systems that allow the cars to &quot;hop.&quot; Learn more in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 29 Aug 2011 15:51:27 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-29-brainstuff-lowrider.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-29-brainstuff-lowrider.mp3' length='784881' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, lowrider, hydraulic, truck,</itunes:keywords>
            <itunes:duration>00:02:03</itunes:duration>
            <itunes:subtitle>Lowriders are vehicles that ride very low to the ground and are often equipped with hydraulics systems that allow the cars to &quot;hop.&quot; Learn more in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What happens when you press Alt and F4?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-26-brainstuff-alt-f4-key.mp3</link>
            <description>The alt-f4 key combination is a faster way to close a window on your computer. Learn more about this and several other keyboard shortcuts in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 26 Aug 2011 16:54:18 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-26-brainstuff-alt-f4-key.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-26-brainstuff-alt-f4-key.mp3' length='824548' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, alt f4,</itunes:keywords>
            <itunes:duration>00:02:10</itunes:duration>
            <itunes:subtitle>The alt-f4 key combination is a faster way to close a window on your computer. Learn more about this and several other keyboard shortcuts in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>When I pay by check, where does that check go?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-24-brainstuff-checks.mp3</link>
            <description>When you write a check to purchase goods and services, it passes through the hands of several banks before the process is complete. Marshall explains how checks are processed through intermediary banks in this episode.</description>
            <pubDate>Wed, 24 Aug 2011 11:30:18 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-24-brainstuff-checks.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-24-brainstuff-checks.mp3' length='1881901' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, check, commerce, pay by check, banking</itunes:keywords>
            <itunes:duration>00:04:49</itunes:duration>
            <itunes:subtitle>When you write a check to purchase goods and services, it passes through the hands of several banks before the process is complete. Marshall explains how checks are processed through intermediary banks in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Where's the best place to sit in a movie theater?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-22-brainstuff-best-movie-seat.mp3</link>
            <description>When it comes to where you should sit in a movie theater to get the best experience, it's mostly a matter of preference. Except when it comes to sound. Find out why -- and where you should sit -- in this episode.</description>
            <pubDate>Mon, 22 Aug 2011 16:20:36 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-22-brainstuff-best-movie-seat.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-22-brainstuff-best-movie-seat.mp3' length='927376' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, movie theater, movie seat, surround sound, seating</itunes:keywords>
            <itunes:duration>00:02:27</itunes:duration>
            <itunes:subtitle>When it comes to where you should sit in a movie theater to get the best experience, it's mostly a matter of preference. Except when it comes to sound. Find out why -- and where you should sit -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What causes the smell after rain?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-19-brainstuff-rain-smell.mp3</link>
            <description>The smell of rain is often linked with spring, and it's been alluded to in poems, songs and stories for centuries. But what exactly causes this distinctive smell? Tune in and find out.</description>
            <pubDate>Fri, 19 Aug 2011 12:40:03 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-19-brainstuff-rain-smell.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-19-brainstuff-rain-smell.mp3' length='1546462' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, rain, smell, bacteria</itunes:keywords>
            <itunes:duration>00:03:53</itunes:duration>
            <itunes:subtitle>The smell of rain is often linked with spring, and it's been alluded to in poems, songs and stories for centuries. But what exactly causes this distinctive smell? Tune in and find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What do the symbols on the U.S. one-dollar bill mean?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-17-brainstuff-dollar-bill.mp3</link>
            <description>If you've ever looked carefully at a U.S. one-dollar bill, you've probably noticed some mysterious symbols and Latin phrases. What do these symbols stand for? Why are they on there? Marshall Brain breaks it down for you in this episode.</description>
            <pubDate>Wed, 17 Aug 2011 16:02:11 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-17-brainstuff-dollar-bill.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-17-brainstuff-dollar-bill.mp3' length='1768105' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, dollar bill, symbol, pyramid, history</itunes:keywords>
            <itunes:duration>00:04:30</itunes:duration>
            <itunes:subtitle>If you've ever looked carefully at a U.S. one-dollar bill, you've probably noticed some mysterious symbols and Latin phrases. What do these symbols stand for? Why are they on there? Marshall Brain breaks it down for you in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is bamboo suddenly appearing in so many products?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-15-brainstuff-bamboo.mp3</link>
            <description>Nowadays bamboo is used to make all sorts of products, from flooring and furniture to bicycle frames. In this episode, Marshall explains why bamboo is becoming so popular -- and the advantages of using it to create consumer goods.</description>
            <pubDate>Mon, 15 Aug 2011 14:47:18 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-15-brainstuff-bamboo.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-15-brainstuff-bamboo.mp3' length='1812618' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, bamboo, bamboo products, bamboo flooring, bamboo furniture</itunes:keywords>
            <itunes:duration>00:04:55</itunes:duration>
            <itunes:subtitle>Nowadays bamboo is used to make all sorts of products, from flooring and furniture to bicycle frames. In this episode, Marshall explains why bamboo is becoming so popular -- and the advantages of using it to create consumer goods.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Flatulence Works</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-12-brainstuff-flatulence.mp3</link>
            <description>Learn about the causes of gas -- and not the kind you put in your car -- in this podcast from Marshall Brain.</description>
            <pubDate>Fri, 12 Aug 2011 14:23:39 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-12-brainstuff-flatulence.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-12-brainstuff-flatulence.mp3' length='955873' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, flatulence, fart, gas</itunes:keywords>
            <itunes:duration>00:02:32</itunes:duration>
            <itunes:subtitle>Learn about the causes of gas -- and not the kind you put in your car -- in this podcast from Marshall Brain.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do limbs fall asleep?</title>
            <link>http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-10-brainstuff-limbs-asleep.mp3</link>
            <description>Pressure on nerves can cause the nerves to stop sending impulses to the brain, causing limbs to fall asleep. Learn more about limbs falling asleep in this HowStuffWorks podcast.</description>
            <pubDate>Wed, 10 Aug 2011 11:52:39 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-10-brainstuff-limbs-asleep.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://www.podtrac.com/pts/redirect.mp3/podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-10-brainstuff-limbs-asleep.mp3' length='704474' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, limbs fall asleep, muscle, nerve, sensation</itunes:keywords>
            <itunes:duration>00:01:33</itunes:duration>
            <itunes:subtitle>Pressure on nerves can cause the nerves to stop sending impulses to the brain, causing limbs to fall asleep. Learn more about limbs falling asleep in this HowStuffWorks podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Color Blindness Works</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-08-brainstuff-color-blindness.mp3</link>
            <description>Color blind individuals can suffer from an inability to differentiate between hues, and occasionally may not be able to see any colors at all. Learn more about color blindness in this HowStuffWorks podcast.</description>
            <pubDate>Mon, 08 Aug 2011 13:57:04 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-08-brainstuff-color-blindness.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-08-brainstuff-color-blindness.mp3' length='718894' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, color blindness, rods, cones, vision, color</itunes:keywords>
            <itunes:duration>00:01:35</itunes:duration>
            <itunes:subtitle>Color blind individuals can suffer from an inability to differentiate between hues, and occasionally may not be able to see any colors at all. Learn more about color blindness in this HowStuffWorks podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do cats have whiskers?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-05-brainstuff-cat-whiskers.mp3</link>
            <description>Cat whiskers, also known as &quot;tactile hairs,&quot; are very different from a cat's regular body hair. In this episode, Marshall explains how these hairs are unique and what cats use them for.</description>
            <pubDate>Fri, 05 Aug 2011 16:49:37 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-05-brainstuff-cat-whiskers.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-05-brainstuff-cat-whiskers.mp3' length='1210730' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, cat whiskers, cat, feline,</itunes:keywords>
            <itunes:duration>00:03:14</itunes:duration>
            <itunes:subtitle>Cat whiskers, also known as &quot;tactile hairs,&quot; are very different from a cat's regular body hair. In this episode, Marshall explains how these hairs are unique and what cats use them for.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Internet Cookies Work</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-03-brainstuff-cookies.mp3</link>
            <description>Internet cookies are information stored as text strings on a machine by a web server. Most commonly, cookies are used to store user IDs.</description>
            <pubDate>Wed, 03 Aug 2011 15:42:53 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-03-brainstuff-cookies.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-03-brainstuff-cookies.mp3' length='1121076' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, cookie, internet security, online</itunes:keywords>
            <itunes:duration>00:02:42</itunes:duration>
            <itunes:subtitle>Internet cookies are information stored as text strings on a machine by a web server. Most commonly, cookies are used to store user IDs.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does making bread work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-01-brainstuff-bread.mp3</link>
            <description>Bread is a technology for turning hard kernels into a soft foodstuff. Learn more about bread and yeast in this HowStuffWorks podcast.</description>
            <pubDate>Mon, 01 Aug 2011 13:13:06 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-01-brainstuff-bread.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-08-01-brainstuff-bread.mp3' length='662628' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, bread, baking, yeast, wheat, food</itunes:keywords>
            <itunes:duration>00:01:26</itunes:duration>
            <itunes:subtitle>Bread is a technology for turning hard kernels into a soft foodstuff. Learn more about bread and yeast in this HowStuffWorks podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does the ball return work on a pool table?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-29-brainstuff-pool-ball-return.mp3</link>
            <description>If you've ever played a coin-operated pool table, then you've probably noticed that the table can sense the difference between the cue ball and the other balls in play. But how does this work? Tune in and find out in this podcast.</description>
            <pubDate>Fri, 29 Jul 2011 15:15:39 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-29-brainstuff-pool-ball-return.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-29-brainstuff-pool-ball-return.mp3' length='1563716' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, pool ball return, pool table</itunes:keywords>
            <itunes:duration>00:03:52</itunes:duration>
            <itunes:subtitle>If you've ever played a coin-operated pool table, then you've probably noticed that the table can sense the difference between the cue ball and the other balls in play. But how does this work? Tune in and find out in this podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do a zebra's stripes act as camoflauge?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-27-brainstuff-zebra-stripes.mp3</link>
            <description>A zebra's stripes offer protection from predators in the form of camouflage -- and a way to identify individual members within the larger group. Learn more about zebra stripes in this episode.</description>
            <pubDate>Wed, 27 Jul 2011 12:47:20 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-27-brainstuff-zebra-stripes.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-27-brainstuff-zebra-stripes.mp3' length='1446319' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, zebra stripes camoflauge, lions colorblind, zebra stripe patterns, zebra stripes</itunes:keywords>
            <itunes:duration>00:03:32</itunes:duration>
            <itunes:subtitle>A zebra's stripes offer protection from predators in the form of camouflage -- and a way to identify individual members within the larger group. Learn more about zebra stripes in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What's the deal with milk?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-25-brainstuff-milk.mp3</link>
            <description>Milk is often touted as a &quot;miracle drink,&quot; full of restorative, nutritional properties. And there's some truth to this claim. Find out why mammal milk is called &quot;the perfect food&quot; in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 25 Jul 2011 10:17:08 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-25-brainstuff-milk.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-25-brainstuff-milk.mp3' length='1473109' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, milk miracle drink, milk nutritional, mammal milk</itunes:keywords>
            <itunes:duration>00:03:14</itunes:duration>
            <itunes:subtitle>Milk is often touted as a &quot;miracle drink,&quot; full of restorative, nutritional properties. And there's some truth to this claim. Find out why mammal milk is called &quot;the perfect food&quot; in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Can I see the stuff astronauts left on the moon?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-22-brainstuff-moon-telescope.mp3</link>
            <description>Using a telescope to view the moon is fascinating -- but could we see the leftovers of NASA's lunar expeditions? Check out this HowStuffWorks podcast to learn more about lunar landings and telescopes.</description>
            <pubDate>Fri, 22 Jul 2011 13:16:36 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-22-brainstuff-moon-telescope.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-22-brainstuff-moon-telescope.mp3' length='769699' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, brain stuff, astronomy, space, moon telescope, lunar telescope, NASA</itunes:keywords>
            <itunes:duration>00:01:39</itunes:duration>
            <itunes:subtitle>Using a telescope to view the moon is fascinating -- but could we see the leftovers of NASA's lunar expeditions? Check out this HowStuffWorks podcast to learn more about lunar landings and telescopes.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do astronauts function in their spacesuits?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-20-brainstuff-spacesuit-eating.mp3</link>
            <description>Astronauts wear special suits while they're working in space, and these spacewalks can last for hours. In this episode, Marshall Brain explains how astronauts take care of their basic needs while wearing spacesuits.</description>
            <pubDate>Wed, 20 Jul 2011 13:11:16 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-20-brainstuff-spacesuit-eating.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-20-brainstuff-spacesuit-eating.mp3' length='1196174' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, EMU, spacesuit functions, astronauts, MAG, IDB</itunes:keywords>
            <itunes:duration>00:02:29</itunes:duration>
            <itunes:subtitle>Astronauts wear special suits while they're working in space, and these spacewalks can last for hours. In this episode, Marshall Brain explains how astronauts take care of their basic needs while wearing spacesuits.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How the Lightsaber Effect Works</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-18-brainstuff-light-saber.mp3</link>
            <description>Unfortunately lightsabers aren't real. The technique used to produce the lightsaber effect is simple, but tedious. Check out this HowStuffWorks podcast to learn more about the special effects behind lightsabers.</description>
            <pubDate>Mon, 18 Jul 2011 13:28:05 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-18-brainstuff-light-saber.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-18-brainstuff-light-saber.mp3' length='860119' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, hsw, brainstuff, brain stuff, lightsaber, light saber, star wars</itunes:keywords>
            <itunes:duration>00:01:54</itunes:duration>
            <itunes:subtitle>Unfortunately lightsabers aren't real. The technique used to produce the lightsaber effect is simple, but tedious. Check out this HowStuffWorks podcast to learn more about the special effects behind lightsabers.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Rearview Mirrors Work</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-15-brainstuff-rearview-mirror.mp3</link>
            <description>How can the same piece of glass have two different amounts of reflection? Learn more about rearview mirrors in this HowStuffWorks podcast.</description>
            <pubDate>Fri, 15 Jul 2011 11:48:10 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-15-brainstuff-rearview-mirror.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-15-brainstuff-rearview-mirror.mp3' length='865597' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>rear-view mirror, rear view mirror, rear mirror, glare, rearview mirror, glare resistant, mirrored surface, reflected image</itunes:keywords>
            <itunes:duration>00:01:33</itunes:duration>
            <itunes:subtitle>How can the same piece of glass have two different amounts of reflection? Learn more about rearview mirrors in this HowStuffWorks podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What type of gas do race cars use?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-13-brainstuff-race-gas.mp3</link>
            <description>Different types of racing vehicles require different types of fuel. Check out this HowStuffWorks podcast to learn more about the advantages and drawbacks of each fuel type.</description>
            <pubDate>Wed, 13 Jul 2011 11:38:12 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-13-brainstuff-race-gas.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-13-brainstuff-race-gas.mp3' length='866232' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, howstuffworks, race car gas, petroleum, ethanol, dragster fuel, racing fuel</itunes:keywords>
            <itunes:duration>00:01:34</itunes:duration>
            <itunes:subtitle>Different types of racing vehicles require different types of fuel. Check out this HowStuffWorks podcast to learn more about the advantages and drawbacks of each fuel type.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why don't they use normal air in race car tires?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-11-brainstuff-tire-nitrogen.mp3</link>
            <description>Race car tires are often filled with nitrogen because nitrogen pressure is more consistent than air pressure. In this episode, Marshall explains why nitrogen is better for race cars -- but not for regular vehicles.</description>
            <pubDate>Mon, 11 Jul 2011 15:21:33 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-11-brainstuff-tire-nitrogen.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-11-brainstuff-tire-nitrogen.mp3' length='981606' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, race car tires, nitrogen pressure, expansion, contraction</itunes:keywords>
            <itunes:duration>00:02:26</itunes:duration>
            <itunes:subtitle>Race car tires are often filled with nitrogen because nitrogen pressure is more consistent than air pressure. In this episode, Marshall explains why nitrogen is better for race cars -- but not for regular vehicles.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is the difference between a turbo-charger and a super-charger?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-08-brainstuff-turbo-super.mp3</link>
            <description>Both turbo- and super-chargers are forced inductions systems, meaning they compress the air flowing into the engine. This compression causes each cylinder of an engine to produce more power. Check out this HowStuffWorks article to learn more.</description>
            <pubDate>Fri, 08 Jul 2011 15:19:17 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-08-brainstuff-turbo-super.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-08-brainstuff-turbo-super.mp3' length='921752' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, turbo-charger, super-charger, cars</itunes:keywords>
            <itunes:duration>00:02:26</itunes:duration>
            <itunes:subtitle>Both turbo- and super-chargers are forced inductions systems, meaning they compress the air flowing into the engine. This compression causes each cylinder of an engine to produce more power. Check out this HowStuffWorks article to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why are traffic lights being replaced with LEDs?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-06-brainstuff-led-traffic-lights.mp3</link>
            <description>Across the country, incandescent traffic lights are being replaced with LED arrays. Check out this podcast from HowStuffWorks to learn more about the advantages of LED traffic lights.</description>
            <pubDate>Wed, 06 Jul 2011 11:45:37 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-06-brainstuff-led-traffic-lights.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-06-brainstuff-led-traffic-lights.mp3' length='751989' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, led, traffic light, technology, traffic, led traffic light, stoplight</itunes:keywords>
            <itunes:duration>00:01:46</itunes:duration>
            <itunes:subtitle>Across the country, incandescent traffic lights are being replaced with LED arrays. Check out this podcast from HowStuffWorks to learn more about the advantages of LED traffic lights.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Could anti-lock brakes detect a flat tire?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-04-brainstuff-flat-tire.mp3</link>
            <description>By using a computer to monitor the rotation of the car's wheels, an anti-lock braking system helps drivers avoid skids. Could this computer also monitor flat tires? Check out this HowStuffWorks podcast to learn more about brake systems.</description>
            <pubDate>Mon, 04 Jul 2011 15:09:20 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-04-brainstuff-flat-tire.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-04-brainstuff-flat-tire.mp3' length='841474' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, brain stuff, Anti-lock Braking System, rotation sensor, flat tire</itunes:keywords>
            <itunes:duration>00:02:13</itunes:duration>
            <itunes:subtitle>By using a computer to monitor the rotation of the car's wheels, an anti-lock braking system helps drivers avoid skids. Could this computer also monitor flat tires? Check out this HowStuffWorks podcast to learn more about brake systems.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do they create patterns in a baseball field?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-01-brainstuff-patterns-baseball-field.mp3</link>
            <description>Groundskeepers at baseball fields create patterns using a process called lawn striping. Tune in to find out how this process works -- and how you can duplicate it to create designs in your own yard.</description>
            <pubDate>Fri, 01 Jul 2011 11:41:34 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-01-brainstuff-patterns-baseball-field.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-07-01-brainstuff-patterns-baseball-field.mp3' length='985837' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, lawn striping, baseball field, landscaping, stadium</itunes:keywords>
            <itunes:duration>00:02:37</itunes:duration>
            <itunes:subtitle>Groundskeepers at baseball fields create patterns using a process called lawn striping. Tune in to find out how this process works -- and how you can duplicate it to create designs in your own yard.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do retractable roofs in convertible stadiums work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-29-brainstuff-retractable-roof-stadiums.mp3</link>
            <description>Retractable roofs are the latest trend in sports stadium design. Marshall highlights multiple examples of convertible stadiums in the United States and explains how they work in this episode.</description>
            <pubDate>Wed, 29 Jun 2011 11:37:20 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-29-brainstuff-retractable-roof-stadiums.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-29-brainstuff-retractable-roof-stadiums.mp3' length='2317774' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, retractable roof, stadium, engineering, architecture</itunes:keywords>
            <itunes:duration>00:05:59</itunes:duration>
            <itunes:subtitle>Retractable roofs are the latest trend in sports stadium design. Marshall highlights multiple examples of convertible stadiums in the United States and explains how they work in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>In baseball, how does a pitcher throw a curveball?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-27-brainstuff-curve-ball.mp3</link>
            <description>A curveball is a pitcher's secret weapon for striking out batters. Discover the physics behind a great curveball in this episode of BrainStuff.</description>
            <pubDate>Mon, 27 Jun 2011 13:59:44 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-27-brainstuff-curve-ball.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-27-brainstuff-curve-ball.mp3' length='1126431' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, baseball, curve ball, pitcher, sport, physics, pitch</itunes:keywords>
            <itunes:duration>00:03:00</itunes:duration>
            <itunes:subtitle>A curveball is a pitcher's secret weapon for striking out batters. Discover the physics behind a great curveball in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Calorie Meters Work</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-24-brainstuff-calorie-meters.mp3</link>
            <description>It's easy to jump on an exercise machine and watch the calorie meter -- but how accurate are these meters? Learn more about calorie meters in this HowStuffWorks podcast</description>
            <pubDate>Fri, 24 Jun 2011 13:45:13 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-24-brainstuff-calorie-meters.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-24-brainstuff-calorie-meters.mp3' length='892398' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, calorie meter, weight, fitness, exercise</itunes:keywords>
            <itunes:duration>00:02:02</itunes:duration>
            <itunes:subtitle>It's easy to jump on an exercise machine and watch the calorie meter -- but how accurate are these meters? Learn more about calorie meters in this HowStuffWorks podcast</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What are hot dogs made from?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-22-brainstuff-hot-dogs.mp3</link>
            <description>Hot dogs were first created in Frankfurt, Germany. But what exactly are they made from? Check out this HowStuffWorks podcast to learn more about the mysterious ingredients of hot dogs.</description>
            <pubDate>Wed, 22 Jun 2011 15:05:14 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-22-brainstuff-hot-dogs.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-22-brainstuff-hot-dogs.mp3' length='914973' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, hot dog, cooking, recipe, ingredient</itunes:keywords>
            <itunes:duration>00:02:06</itunes:duration>
            <itunes:subtitle>Hot dogs were first created in Frankfurt, Germany. But what exactly are they made from? Check out this HowStuffWorks podcast to learn more about the mysterious ingredients of hot dogs.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does popcorn work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-20-brainstuff-popcorn.mp3</link>
            <description>Popcorn is a ubiquitous snack, but there's nothing commonplace about its creation. How does a kernel of corn become a puffed white treat? Find out in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 20 Jun 2011 13:10:22 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-20-brainstuff-popcorn.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-20-brainstuff-popcorn.mp3' length='677826' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, popcorn, cooking, microwave, corn, snacks</itunes:keywords>
            <itunes:duration>00:01:26</itunes:duration>
            <itunes:subtitle>Popcorn is a ubiquitous snack, but there's nothing commonplace about its creation. How does a kernel of corn become a puffed white treat? Find out in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Cooking at High Altitudes Works</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-17-brainstuff-altitude-cooking.mp3</link>
            <description>The boiling point of water decreases as altitude increases -- generally, this temperature decreases by one degree for every 540 feet of altitude. Learn more about cooking at high altitudes in this podcast from HowStuffWorks.</description>
            <pubDate>Fri, 17 Jun 2011 15:31:35 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-17-brainstuff-altitude-cooking.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-17-brainstuff-altitude-cooking.mp3' length='967016' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, cooking, altitude, boil water</itunes:keywords>
            <itunes:duration>00:01:47</itunes:duration>
            <itunes:subtitle>The boiling point of water decreases as altitude increases -- generally, this temperature decreases by one degree for every 540 feet of altitude. Learn more about cooking at high altitudes in this podcast from HowStuffWorks.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How is olive oil made?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-15-brainstuff-olive-oil.mp3</link>
            <description>People across the planet love olive oil, and it's not hard to see why: This tasty liquid lends flavor to hundreds of dishes, and it's been used for thousands of years. But how does it get from the tree to the bottle? Tune in to find out.</description>
            <pubDate>Wed, 15 Jun 2011 12:15:54 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-15-brainstuff-olive-oil.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-15-brainstuff-olive-oil.mp3' length='2887786' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, olive oil, olives, food, condiment, pimento</itunes:keywords>
            <itunes:duration>00:07:34</itunes:duration>
            <itunes:subtitle>People across the planet love olive oil, and it's not hard to see why: This tasty liquid lends flavor to hundreds of dishes, and it's been used for thousands of years. But how does it get from the tree to the bottle? Tune in to find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do bake and broil settings differ?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-13-brainstuff-bake-v-broil.mp3</link>
            <description>Kitchen ovens typically have two settings: bake and broil. What's the difference between the two? Explore the science behind baking and broiling in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 13 Jun 2011 13:10:20 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-13-brainstuff-bake-v-broil.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-13-brainstuff-bake-v-broil.mp3' length='1197733' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, oven, bake, broil, hot air, preheat, infrared radiation, grill, broiler</itunes:keywords>
            <itunes:duration>00:03:12</itunes:duration>
            <itunes:subtitle>Kitchen ovens typically have two settings: bake and broil. What's the difference between the two? Explore the science behind baking and broiling in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How much fuel does an airplane use for a trip?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-10-brainstuff-airplane-mileage.mp3</link>
            <description>A Boeing 747 uses approximately one galloon of fuel per second -- over the course of a ten hour flight, it might burn 36,00 galloons of fuel. How does this compare to a car? Check out this HowStuffWorks podcast to learn more about airplane mileage.</description>
            <pubDate>Fri, 10 Jun 2011 14:23:32 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-10-brainstuff-airplane-mileage.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-10-brainstuff-airplane-mileage.mp3' length='687113' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, air, aircraft, mpg, Boeing 747</itunes:keywords>
            <itunes:duration>00:01:47</itunes:duration>
            <itunes:subtitle>A Boeing 747 uses approximately one galloon of fuel per second -- over the course of a ten hour flight, it might burn 36,00 galloons of fuel. How does this compare to a car? Check out this HowStuffWorks podcast to learn more about airplane mileage.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Sonic Booms Work</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-08-brainstuff-sonic-boom.mp3</link>
            <description>The sonic booms formed by planes are similar to the wakes left by boats in water. But how? To learn more about sonic booms, check out this classic podcast -- it's one of our editors' favorites.</description>
            <pubDate>Wed, 08 Jun 2011 13:51:26 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-08-brainstuff-sonic-boom.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-08-brainstuff-sonic-boom.mp3' length='919040' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, sonic boom, physics, flight, air speed, aerodynamics</itunes:keywords>
            <itunes:duration>00:02:26</itunes:duration>
            <itunes:subtitle>The sonic booms formed by planes are similar to the wakes left by boats in water. But how? To learn more about sonic booms, check out this classic podcast -- it's one of our editors' favorites.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does an upside down airplane's engine get fuel?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-06-brainstuff-upside-down-airplane.mp3</link>
            <description>Airplanes rely on gravity to disperse fuel to the engine, but what happens when the plane is flying upside down? Tune in to this podcast from HowStuffWorks.com to discover ways that acrobatic planes fly upside down without crashing.</description>
            <pubDate>Mon, 06 Jun 2011 14:15:03 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-06-brainstuff-upside-down-airplane.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-06-brainstuff-upside-down-airplane.mp3' length='682715' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, acrobatic plane, fuel, upside down, gravity, flop tube, fuel tank</itunes:keywords>
            <itunes:duration>00:01:46</itunes:duration>
            <itunes:subtitle>Airplanes rely on gravity to disperse fuel to the engine, but what happens when the plane is flying upside down? Tune in to this podcast from HowStuffWorks.com to discover ways that acrobatic planes fly upside down without crashing.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do aircraft carriers work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-03-brainstuff-aircraft-carrier.mp3</link>
            <description>Aircraft carriers contain some of the most advanced technology in the world. Learn more about aircraft and aircraft carriers in this podcast.</description>
            <pubDate>Fri, 03 Jun 2011 15:43:43 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-03-brainstuff-aircraft-carrier.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-03-brainstuff-aircraft-carrier.mp3' length='595236' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, air, aircraft carrier, aircraft, navy</itunes:keywords>
            <itunes:duration>00:01:32</itunes:duration>
            <itunes:subtitle>Aircraft carriers contain some of the most advanced technology in the world. Learn more about aircraft and aircraft carriers in this podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Contrails Work</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-01-brainstuff-contrail.mp3</link>
            <description>The clouds that some jets form on certain days are called condensation trails -- or contrails. Check out this HowStuffWorks podcast to learn more about condensation, weather and jets.</description>
            <pubDate>Wed, 01 Jun 2011 12:21:31 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-01-brainstuff-contrail.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-06-01-brainstuff-contrail.mp3' length='823900' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, contrail, aircraft, condensation, airplane,</itunes:keywords>
            <itunes:duration>00:02:10</itunes:duration>
            <itunes:subtitle>The clouds that some jets form on certain days are called condensation trails -- or contrails. Check out this HowStuffWorks podcast to learn more about condensation, weather and jets.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Air Force One Works</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-30-brainstuff-air-force-one.mp3</link>
            <description>Air Force One is gigantic, but how does it work? This is one of our editors' favorite episodes, and it's no surprise why: Listen in for a brief, detailed look at the interior of Air Force One.</description>
            <pubDate>Mon, 30 May 2011 16:22:04 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-30-brainstuff-air-force-one.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-30-brainstuff-air-force-one.mp3' length='701025' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, air force one, presidential airplane, aircraft</itunes:keywords>
            <itunes:duration>00:01:49</itunes:duration>
            <itunes:subtitle>Air Force One is gigantic, but how does it work? This is one of our editors' favorite episodes, and it's no surprise why: Listen in for a brief, detailed look at the interior of Air Force One.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How big does a meteor have to be to reach the ground?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-27-brainstuff-meteors.mp3</link>
            <description>If you've spent much time looking up at the night sky, then you've probably seen some spectacular meteor showers. But how big do these things have to be make it through Earth's atmosphere and reach the ground? Tune in and find out.</description>
            <pubDate>Fri, 27 May 2011 13:52:26 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-27-brainstuff-meteors.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-27-brainstuff-meteors.mp3' length='1849612' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, astronomy, meteor, space, asteroid, meteorite</itunes:keywords>
            <itunes:duration>00:05:01</itunes:duration>
            <itunes:subtitle>If you've spent much time looking up at the night sky, then you've probably seen some spectacular meteor showers. But how big do these things have to be make it through Earth's atmosphere and reach the ground? Tune in and find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is there any way to see orbiting satellites?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-25-brainstuff-see-satellite.mp3</link>
            <description>Satellites are fascinating, but for most people they're somewhat mysterious. They float somewhere in space, invisible to the naked eye -- or are they? In this episode of BrainStuff, Marshall explains the physics behind satellites and orbits.</description>
            <pubDate>Wed, 25 May 2011 17:05:48 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-25-brainstuff-see-satellite.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-25-brainstuff-see-satellite.mp3' length='732246' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, space, satellite, orbit, gravity, physics</itunes:keywords>
            <itunes:duration>00:01:55</itunes:duration>
            <itunes:subtitle>Satellites are fascinating, but for most people they're somewhat mysterious. They float somewhere in space, invisible to the naked eye -- or are they? In this episode of BrainStuff, Marshall explains the physics behind satellites and orbits.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do satellites orbit the Earth?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-23-brainstuff-orbit.mp3</link>
            <description>Satellites are fascinating, but for most people they're somewhat mysterious. So how do they stay in orbit without plummeting to Earth? In this episode of BrainStuff, Marshall explains the physics behind satellites and orbits.</description>
            <pubDate>Mon, 23 May 2011 14:19:49 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-23-brainstuff-orbit.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-23-brainstuff-orbit.mp3' length='1318728' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, space, satellite, orbit, gravity, physics</itunes:keywords>
            <itunes:duration>00:03:32</itunes:duration>
            <itunes:subtitle>Satellites are fascinating, but for most people they're somewhat mysterious. So how do they stay in orbit without plummeting to Earth? In this episode of BrainStuff, Marshall explains the physics behind satellites and orbits.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do astronomers measure distance?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-20-brainstuff-distance-to-star.mp3</link>
            <description>Since astronomers can't actually travel to a star, they rely on two ingenious methods to measure a star's distance from earth. Listen in as Marshall Brain breaks down the science of space measurement in this editor's choice podcast from HowStuffWorks.</description>
            <pubDate>Fri, 20 May 2011 14:59:38 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-20-brainstuff-distance-to-star.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-20-brainstuff-distance-to-star.mp3' length='862028' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, astronomy, measurement, space, space exploration, stars</itunes:keywords>
            <itunes:duration>00:02:00</itunes:duration>
            <itunes:subtitle>Since astronomers can't actually travel to a star, they rely on two ingenious methods to measure a star's distance from earth. Listen in as Marshall Brain breaks down the science of space measurement in this editor's choice podcast from HowStuffWorks.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a light year?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-18-brainstuff-lightyear.mp3</link>
            <description>A light year is a way of measuring distance -- specifically, the distance light can travel in one year. Just how far is that? Check out this classic Brainstuff podcast from HowStuffWorks' archives to learn more about astronomy.</description>
            <pubDate>Wed, 18 May 2011 14:29:52 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-18-brainstuff-lightyear.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-18-brainstuff-lightyear.mp3' length='1026091' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, lightyear, space exploration, astronomy</itunes:keywords>
            <itunes:duration>00:02:44</itunes:duration>
            <itunes:subtitle>A light year is a way of measuring distance -- specifically, the distance light can travel in one year. Just how far is that? Check out this classic Brainstuff podcast from HowStuffWorks' archives to learn more about astronomy.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do space suits work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-16-brainstuff-space-suit.mp3</link>
            <description>Space suits provide oxygen, pressurize air, and control an astronaut's temperature. Learn more about space suits in this classic HowStuffWorks podcast, one of our editors' hand-picked favorites.</description>
            <pubDate>Mon, 16 May 2011 16:27:38 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-16-brainstuff-space-suit.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-16-brainstuff-space-suit.mp3' length='590053' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, space, space-suit, space, nasa, astronaut</itunes:keywords>
            <itunes:duration>00:01:31</itunes:duration>
            <itunes:subtitle>Space suits provide oxygen, pressurize air, and control an astronaut's temperature. Learn more about space suits in this classic HowStuffWorks podcast, one of our editors' hand-picked favorites.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do cavities work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-13-brainstuff-cavities.mp3</link>
            <description>It's editor's choice month, so tune in and catch our editors' favorite episodes. This week, Marshall is covering cavities: They're formed by bacteria that excrete an acid onto the enamel of a tooth -- but how? Listen in to learn more.</description>
            <pubDate>Fri, 13 May 2011 15:50:36 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-13-brainstuff-cavities.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-13-brainstuff-cavities.mp3' length='682516' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, editor's choice, cavities, dentist, oral hygiene</itunes:keywords>
            <itunes:duration>00:01:46</itunes:duration>
            <itunes:subtitle>It's editor's choice month, so tune in and catch our editors' favorite episodes. This week, Marshall is covering cavities: They're formed by bacteria that excrete an acid onto the enamel of a tooth -- but how? Listen in to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does Krispy Kreme work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-11-brainstuff-krispy-kreme.mp3</link>
            <description>A single Krispy Kreme store can produce 100,000 doughnuts a day. To learn more about how these Krispy Kreme doughnuts are made, check out this HowStuffWorks podcast.</description>
            <pubDate>Wed, 11 May 2011 12:38:22 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-11-brainstuff-krispy-kreme.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-11-brainstuff-krispy-kreme.mp3' length='600076' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, youtube, hbo, advertising</itunes:keywords>
            <itunes:duration>00:01:32</itunes:duration>
            <itunes:subtitle>A single Krispy Kreme store can produce 100,000 doughnuts a day. To learn more about how these Krispy Kreme doughnuts are made, check out this HowStuffWorks podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do carbohydrates work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-09-brainstuff-carbohydrates.mp3</link>
            <description>We hear about carbohydrates in the news constantly -- the complex carbs are supposed to be better than the simple ones, but why? In fact, what exactly is a carbohydrate? Listen in and learn more in this podcast.</description>
            <pubDate>Mon, 09 May 2011 14:17:25 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-09-brainstuff-carbohydrates.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-09-brainstuff-carbohydrates.mp3' length='2223232' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, carbohydrate, health, diet, nutrition</itunes:keywords>
            <itunes:duration>00:06:03</itunes:duration>
            <itunes:subtitle>We hear about carbohydrates in the news constantly -- the complex carbs are supposed to be better than the simple ones, but why? In fact, what exactly is a carbohydrate? Listen in and learn more in this podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Marshall Brain's News Roundup: May 6th, 2011</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-06-brainstuff-news-roundup-14.mp3</link>
            <description>With billions of people on the planet and millions of astonishing events happening each day, it's tough to keep track of everything. Luckily, Marshall's here to keep you up-to-date with the latest news in his weekly news roundup. Tune in and learn more.</description>
            <pubDate>Fri, 06 May 2011 16:30:06 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-06-brainstuff-news-roundup-14.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-06-brainstuff-news-roundup-14.mp3' length='5235843' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, news, current events, may 6</itunes:keywords>
            <itunes:duration>00:14:25</itunes:duration>
            <itunes:subtitle>With billions of people on the planet and millions of astonishing events happening each day, it's tough to keep track of everything. Luckily, Marshall's here to keep you up-to-date with the latest news in his weekly news roundup. Tune in and learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do people choke under pressure?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-04-brainstuff-choke-pressure.mp3</link>
            <description>Anyone who watched the Master's tournament knows that Rory McElroy famously choked under pressure -- but what exactly happened? In this podcast, Marshall explores the science behind choking in stressful or intimidating situations.</description>
            <pubDate>Wed, 04 May 2011 15:35:07 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-04-brainstuff-choke-pressure.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-04-brainstuff-choke-pressure.mp3' length='2686082' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, pressure, stress, choke under pressure</itunes:keywords>
            <itunes:duration>00:07:20</itunes:duration>
            <itunes:subtitle>Anyone who watched the Master's tournament knows that Rory McElroy famously choked under pressure -- but what exactly happened? In this podcast, Marshall explores the science behind choking in stressful or intimidating situations.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Securing Your Wifi Router</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-02-brainstuff-wireless-password.mp3</link>
            <description>Is it possible to get arrested for downloading illegal material even if you never download it yourself? Yes: When someone else logs onto your unprotected wifi, they can make a clean getaway while you get stuck with the blame. Tune in to learn more.</description>
            <pubDate>Mon, 02 May 2011 14:37:59 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-02-brainstuff-wireless-password.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-05-02-brainstuff-wireless-password.mp3' length='2120103' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall,</itunes:keywords>
            <itunes:duration>00:05:46</itunes:duration>
            <itunes:subtitle>Is it possible to get arrested for downloading illegal material even if you never download it yourself? Yes: When someone else logs onto your unprotected wifi, they can make a clean getaway while you get stuck with the blame. Tune in to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Marshall Brain's News Roundup: April 29th, 2011</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-29-brainstuff-news-roundup-13.mp3</link>
            <description>With billions of people on the planet and millions of astonishing events happening each day, it's tough to keep track of everything. Luckily, Marshall's here to keep you up-to-date with the latest news in his weekly news roundup. Tune in and learn more.</description>
            <pubDate>Fri, 29 Apr 2011 16:13:51 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-29-brainstuff-news-roundup-13.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-29-brainstuff-news-roundup-13.mp3' length='4403896' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, news, current events, april 29,</itunes:keywords>
            <itunes:duration>00:12:06</itunes:duration>
            <itunes:subtitle>With billions of people on the planet and millions of astonishing events happening each day, it's tough to keep track of everything. Luckily, Marshall's here to keep you up-to-date with the latest news in his weekly news roundup. Tune in and learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is it possible to use a leaf blower as a supercharger?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-27-brainstuff-leafblower-supercharger.mp3</link>
            <description>Leaf blowers are convenient, but are they living up to their potential? In this podcast, Marshall examines superchargers, explaining how a leaf blower can (theoretically) perform the same duties. Tune in and learn more about hacking leaf blowers.</description>
            <pubDate>Wed, 27 Apr 2011 15:39:27 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-27-brainstuff-leafblower-supercharger.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-27-brainstuff-leafblower-supercharger.mp3' length='2797539' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall,</itunes:keywords>
            <itunes:duration>00:07:39</itunes:duration>
            <itunes:subtitle>Leaf blowers are convenient, but are they living up to their potential? In this podcast, Marshall examines superchargers, explaining how a leaf blower can (theoretically) perform the same duties. Tune in and learn more about hacking leaf blowers.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do artificial sweeteners work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-25-brainstuff-artificial-sweeteners.mp3</link>
            <description>At many restaurants, a little container on the table will have regular sugar in addition to artificial sweeteners. But what exactly are artificial sweeteners, and how do they differ in comparison to regular sugar? Listen in to find out.</description>
            <pubDate>Mon, 25 Apr 2011 13:07:21 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-25-brainstuff-artificial-sweeteners.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-25-brainstuff-artificial-sweeteners.mp3' length='2903316' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall,</itunes:keywords>
            <itunes:duration>00:07:56</itunes:duration>
            <itunes:subtitle>At many restaurants, a little container on the table will have regular sugar in addition to artificial sweeteners. But what exactly are artificial sweeteners, and how do they differ in comparison to regular sugar? Listen in to find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Marshall Brain's News Roundup: April 22nd, 2011</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-22-brainstuff-news-roundup-12.mp3</link>
            <description>From the Dukan Diet to gigantic super organisms, there's no shortage of fascinating news stories each week -- so how can you keep track of the best? Never fear: Tune in as Marshall catches you up to speed with his weekly news roundup.</description>
            <pubDate>Fri, 22 Apr 2011 13:54:56 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-22-brainstuff-news-roundup-12.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-22-brainstuff-news-roundup-12.mp3' length='6049775' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, news, current events, april 22, dukan, android</itunes:keywords>
            <itunes:duration>00:16:41</itunes:duration>
            <itunes:subtitle>From the Dukan Diet to gigantic super organisms, there's no shortage of fascinating news stories each week -- so how can you keep track of the best? Never fear: Tune in as Marshall catches you up to speed with his weekly news roundup.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What does a gigabyte of internet access really cost?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-20-brainstuff-internet-bandwidth-cost.mp3</link>
            <description>Internet service providers often tangle with customers who claim they're being ripped off -- but how much does a gigabyte of access actually cost? Join Marshall Brain as he breaks down the real cost of a gigabyte's worth of internet access.</description>
            <pubDate>Wed, 20 Apr 2011 16:36:26 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-20-brainstuff-internet-bandwidth-cost.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-20-brainstuff-internet-bandwidth-cost.mp3' length='3330750' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, gigabyte, cost, isp, internet access</itunes:keywords>
            <itunes:duration>00:09:08</itunes:duration>
            <itunes:subtitle>Internet service providers often tangle with customers who claim they're being ripped off -- but how much does a gigabyte of access actually cost? Join Marshall Brain as he breaks down the real cost of a gigabyte's worth of internet access.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a pressurized airplane cabin work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-18-brainstuff-airplane-cabin.mp3</link>
            <description>How does a pressurized airplane cabin work -- more importantly, what happens when the pressure fails? Join Marshall Brain as he breaks down the science behind cabin pressurization.</description>
            <pubDate>Mon, 18 Apr 2011 15:43:39 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-18-brainstuff-airplane-cabin.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-18-brainstuff-airplane-cabin.mp3' length='2117457' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, airplane, cabin pressure, pressurized air, plane crash</itunes:keywords>
            <itunes:duration>00:05:45</itunes:duration>
            <itunes:subtitle>How does a pressurized airplane cabin work -- more importantly, what happens when the pressure fails? Join Marshall Brain as he breaks down the science behind cabin pressurization.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Marshall Brain's News Roundup: April 15th, 2011</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-15-brainstuff-news-roundup-11.mp3</link>
            <description>With billions of people on the planet and millions of astonishing events happening each day, it's tough to keep track of everything. Luckily, Marshall's here to keep you up-to-date with the latest news in his weekly news roundup. Tune in and learn more.</description>
            <pubDate>Fri, 15 Apr 2011 14:32:59 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-15-brainstuff-news-roundup-11.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-15-brainstuff-news-roundup-11.mp3' length='6207443' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, news, current events, april 15, at-at, hoth, graphite</itunes:keywords>
            <itunes:duration>00:17:07</itunes:duration>
            <itunes:subtitle>With billions of people on the planet and millions of astonishing events happening each day, it's tough to keep track of everything. Luckily, Marshall's here to keep you up-to-date with the latest news in his weekly news roundup. Tune in and learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is it possible to rescue water-soaked electronics?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-13-brainstuff-electronics-in-water.mp3</link>
            <description>Is it possible to rescue an electronic device dunked in water? In this episode, Marshall recounts an unfortunate meeting between a GPS device and a dog's water bowl. Tune in to learn whether or not he was able to fix it.</description>
            <pubDate>Wed, 13 Apr 2011 16:13:28 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-13-brainstuff-electronics-in-water.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-13-brainstuff-electronics-in-water.mp3' length='1545081' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, electronics and water, repairing electronics, gadgets</itunes:keywords>
            <itunes:duration>00:04:10</itunes:duration>
            <itunes:subtitle>Is it possible to rescue an electronic device dunked in water? In this episode, Marshall recounts an unfortunate meeting between a GPS device and a dog's water bowl. Tune in to learn whether or not he was able to fix it.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Will space tourism become a reality?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-11-brainstuff-space-tourism.mp3</link>
            <description>With private companies frantically searching for new ways to take people into orbit, it seems that space tourism could become a reality (for those who can afford it). But  will it ever really happen? Tune in and learn more in this podcast.</description>
            <pubDate>Mon, 11 Apr 2011 18:02:45 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-11-brainstuff-space-tourism.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-11-brainstuff-space-tourism.mp3' length='2038791' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, space tourism, nasa, space</itunes:keywords>
            <itunes:duration>00:05:32</itunes:duration>
            <itunes:subtitle>With private companies frantically searching for new ways to take people into orbit, it seems that space tourism could become a reality (for those who can afford it). But  will it ever really happen? Tune in and learn more in this podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Marshall Brain's News Roundup: April 7th, 2011</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-08-brainstuff-news-roundup-10.mp3</link>
            <description>With billions of people on the planet and millions of astonishing events happening each day, it's tough to keep track of everything. Luckily, Marshall's here to keep you up-to-date with the latest news in his weekly news roundup. Tune in and learn more.</description>
            <pubDate>Fri, 08 Apr 2011 17:41:23 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-08-brainstuff-news-roundup-10.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-08-brainstuff-news-roundup-10.mp3' length='5186479' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, news, current events, april 7</itunes:keywords>
            <itunes:duration>00:14:16</itunes:duration>
            <itunes:subtitle>With billions of people on the planet and millions of astonishing events happening each day, it's tough to keep track of everything. Luckily, Marshall's here to keep you up-to-date with the latest news in his weekly news roundup. Tune in and learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How many people does it take to do a Formula 1 pit stop?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-06-brainstuff-7-second-pit-stop.mp3</link>
            <description>If you've ever seen a Formula 1 race, then you know the race isn't just between cars -- it's also between pit stop crews. In seven seconds these crews perform an entire pit stop. But how does it work, and how many people does it take? Tune in to find out.</description>
            <pubDate>Wed, 06 Apr 2011 14:21:16 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-06-brainstuff-7-second-pit-stop.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-06-brainstuff-7-second-pit-stop.mp3' length='1215157' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, forumla 1, pit stop, racing</itunes:keywords>
            <itunes:duration>00:03:15</itunes:duration>
            <itunes:subtitle>If you've ever seen a Formula 1 race, then you know the race isn't just between cars -- it's also between pit stop crews. In seven seconds these crews perform an entire pit stop. But how does it work, and how many people does it take? Tune in to find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is the worst invasive public species?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-04-brainstuff-invasive-species.mp3</link>
            <description>From kudzu to cane toads, invasive species are changing the world. But which of these transplants is the worst for the local landscape? Tune in as Marshall Brain tackles invasive species across the world -- and ultimately concludes which one is the worst.</description>
            <pubDate>Tue, 05 Apr 2011 12:58:04 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-04-brainstuff-invasive-species.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-04-brainstuff-invasive-species.mp3' length='1922138' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, invasive species, ecology, kudzu, cane toad</itunes:keywords>
            <itunes:duration>00:05:12</itunes:duration>
            <itunes:subtitle>From kudzu to cane toads, invasive species are changing the world. But which of these transplants is the worst for the local landscape? Tune in as Marshall Brain tackles invasive species across the world -- and ultimately concludes which one is the worst.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Marshall Brain's News Roundup: April 1st, 2011</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-01-brainstuff-news-update-9.mp3</link>
            <description>With billions of people on the planet and millions of astonishing events happening each day, it's tough to keep track of everything. Luckily, Marshall's here to keep you up-to-date with the latest news in his weekly news roundup. Tune in and learn more.</description>
            <pubDate>Fri, 01 Apr 2011 16:27:34 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-01-brainstuff-news-update-9.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-04-01-brainstuff-news-update-9.mp3' length='4449981' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, news, current events, april 1</itunes:keywords>
            <itunes:duration>00:12:14</itunes:duration>
            <itunes:subtitle>With billions of people on the planet and millions of astonishing events happening each day, it's tough to keep track of everything. Luckily, Marshall's here to keep you up-to-date with the latest news in his weekly news roundup. Tune in and learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does someone become a saint?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-30-brainstuff-saints.mp3</link>
            <description>Many religions bestow a special status on people who demonstrate a life of almost perfect virtue -- but how does canonization actually occur? In this episode, Marshall breaks down the process used to officially recognize a person as a saint.</description>
            <pubDate>Wed, 30 Mar 2011 15:45:57 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-30-brainstuff-saints.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-30-brainstuff-saints.mp3' length='2041900' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, canonization, saint, beatify, catholicism</itunes:keywords>
            <itunes:duration>00:05:33</itunes:duration>
            <itunes:subtitle>Many religions bestow a special status on people who demonstrate a life of almost perfect virtue -- but how does canonization actually occur? In this episode, Marshall breaks down the process used to officially recognize a person as a saint.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Where should I sit to get the best ride on a roller coaster?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-28-brainstuff-best-seat.mp3</link>
            <description>Each roller coaster car is moved by the cars connected to it, which makes the experience of riding a rollercoaster a bit different in each car. Learn which seat on a roller coaster is best for you, based on science and your personal preferences.</description>
            <pubDate>Mon, 28 Mar 2011 14:40:23 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-28-brainstuff-best-seat.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-28-brainstuff-best-seat.mp3' length='1658380' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, roller coaster, amusement park, physics</itunes:keywords>
            <itunes:duration>00:04:21</itunes:duration>
            <itunes:subtitle>Each roller coaster car is moved by the cars connected to it, which makes the experience of riding a rollercoaster a bit different in each car. Learn which seat on a roller coaster is best for you, based on science and your personal preferences.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Marshall Brain's News Roundup: March 25th, 2011</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-25-brainstuff-news-roundup-8.mp3</link>
            <description>From streaming photo albums to Rebecca Black, this week has been chock-full of fascinating (or, at least in Rebecca's case, unavoidable) events. Tune in as Marshall Brain helps you catch up on the latest and most interesting news from around the world.</description>
            <pubDate>Fri, 25 Mar 2011 15:28:35 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-25-brainstuff-news-roundup-8.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-25-brainstuff-news-roundup-8.mp3' length='5903062' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, news, current events, march 25</itunes:keywords>
            <itunes:duration>00:16:08</itunes:duration>
            <itunes:subtitle>From streaming photo albums to Rebecca Black, this week has been chock-full of fascinating (or, at least in Rebecca's case, unavoidable) events. Tune in as Marshall Brain helps you catch up on the latest and most interesting news from around the world.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does emergency preparedness work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-23-brainstuff-emergency-preparedness.mp3</link>
            <description>In moments, a natural disaster can level cities, kill thousands and force survivors to scavenge through the rubble for supplies. In this podcast, Marshall discusses the importance of preparedness and the types of supplies you may need in an emergency.</description>
            <pubDate>Wed, 23 Mar 2011 13:24:26 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-23-brainstuff-emergency-preparedness.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-23-brainstuff-emergency-preparedness.mp3' length='1819483' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, natural disaster</itunes:keywords>
            <itunes:duration>00:04:47</itunes:duration>
            <itunes:subtitle>In moments, a natural disaster can level cities, kill thousands and force survivors to scavenge through the rubble for supplies. In this podcast, Marshall discusses the importance of preparedness and the types of supplies you may need in an emergency.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Time Stands Still</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-21-brainstuff-time-stands-still.mp3</link>
            <description>Current technology isn't able to actually stop the passage of time, but under certain circumstances time can appear to stop -- and all you need is an airplane. Tune in to learn more.</description>
            <pubDate>Mon, 21 Mar 2011 14:21:40 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-21-brainstuff-time-stands-still.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-21-brainstuff-time-stands-still.mp3' length='1206019' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall,</itunes:keywords>
            <itunes:duration>00:03:05</itunes:duration>
            <itunes:subtitle>Current technology isn't able to actually stop the passage of time, but under certain circumstances time can appear to stop -- and all you need is an airplane. Tune in to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Marshall Brain's News Roundup: March 18th, 2011</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-18-brainstuff-news-roundup-7.mp3</link>
            <description>As the nuclear situation in Japan continues to deteriorate, Marshall explores how a similar earthquake could affect the United States. And that's not all: Tune in and catch up on the latest, most fascinating news of the past week in this podcast.</description>
            <pubDate>Fri, 18 Mar 2011 17:29:51 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-18-brainstuff-news-roundup-7.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-18-brainstuff-news-roundup-7.mp3' length='4954190' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, news, current events, march 18, japan, tech</itunes:keywords>
            <itunes:duration>00:13:30</itunes:duration>
            <itunes:subtitle>As the nuclear situation in Japan continues to deteriorate, Marshall explores how a similar earthquake could affect the United States. And that's not all: Tune in and catch up on the latest, most fascinating news of the past week in this podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is mayonnaise?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-16-brainstuff-mayo.mp3</link>
            <description>Mayo is an emulsion - a mixture of two liquids that normally can't be combined. So how do these ingredients come together? Tune in to learn how oil, egg yolks and acid combine to form one of the world's most popular condiments.</description>
            <pubDate>Wed, 16 Mar 2011 15:58:28 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-16-brainstuff-mayo.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-16-brainstuff-mayo.mp3' length='2034834' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, mayonnaise, condiment, mayo,</itunes:keywords>
            <itunes:duration>00:05:23</itunes:duration>
            <itunes:subtitle>Mayo is an emulsion - a mixture of two liquids that normally can't be combined. So how do these ingredients come together? Tune in to learn how oil, egg yolks and acid combine to form one of the world's most popular condiments.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Japan's Nuclear Problem</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-14-brainstuff-japan-nuclear-problem.mp3</link>
            <description>When the recent earthquake hit Japan, it seemed the country had withstood the worst of the blast -- until explosions occurred at a nuclear power plant. Is another disaster on the way? Tune in as Marshall explains the state of Japan's nuclear power plants.</description>
            <pubDate>Mon, 14 Mar 2011 16:16:51 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-14-brainstuff-japan-nuclear-problem.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-14-brainstuff-japan-nuclear-problem.mp3' length='3859386' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, japan, earthquake, nuclear power plant</itunes:keywords>
            <itunes:duration>00:10:36</itunes:duration>
            <itunes:subtitle>When the recent earthquake hit Japan, it seemed the country had withstood the worst of the blast -- until explosions occurred at a nuclear power plant. Is another disaster on the way? Tune in as Marshall explains the state of Japan's nuclear power plants.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is it possible to turn coal into oil?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-09-brainstuff-oil-from-coal.mp3</link>
            <description>As the demand for dwindling oil supplies rises, scientists across the world search for new ways to generate energy. In this episode, Marshall looks at a new attempt to stave off the looming fossil fuel crisis: Turning coal into oil. Tune in to learn more.</description>
            <pubDate>Wed, 09 Mar 2011 11:42:20 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-09-brainstuff-oil-from-coal.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-09-brainstuff-oil-from-coal.mp3' length='2171814' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, coal, oil, petroleum, energy crisis, peak oil</itunes:keywords>
            <itunes:duration>00:05:46</itunes:duration>
            <itunes:subtitle>As the demand for dwindling oil supplies rises, scientists across the world search for new ways to generate energy. In this episode, Marshall looks at a new attempt to stave off the looming fossil fuel crisis: Turning coal into oil. Tune in to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do eggs turn hard when you boil them?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-07-brainstuff-hard-boiled-eggs.mp3</link>
            <description>Eggs are rich in protein, and this protein causes eggs to turn hard when they're boiled - but how does it actually work? Tune in as Marshall Brain breaks down the science behind hard-boiled eggs.</description>
            <pubDate>Mon, 07 Mar 2011 13:23:36 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-07-brainstuff-hard-boiled-eggs.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-07-brainstuff-hard-boiled-eggs.mp3' length='1300058' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, hard boiled eggs, food chemistry, protein</itunes:keywords>
            <itunes:duration>00:03:21</itunes:duration>
            <itunes:subtitle>Eggs are rich in protein, and this protein causes eggs to turn hard when they're boiled - but how does it actually work? Tune in as Marshall Brain breaks down the science behind hard-boiled eggs.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Marshall Brain's News Roundup: March 4th, 2011</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-04-brainstuff-news-roundup-5.mp3</link>
            <description>Want to catch up on the biggest news stories of the week? If so, tune in as Marshall Brain analyzes the latest breaking news from around the world in this weekly news roundup. Tune in to learn more.</description>
            <pubDate>Fri, 04 Mar 2011 15:49:35 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-04-brainstuff-news-roundup-5.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-04-brainstuff-news-roundup-5.mp3' length='5526428' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, news roundup, marshall brain, brainstuff, current events</itunes:keywords>
            <itunes:duration>00:15:05</itunes:duration>
            <itunes:subtitle>Want to catch up on the biggest news stories of the week? If so, tune in as Marshall Brain analyzes the latest breaking news from around the world in this weekly news roundup. Tune in to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Where does aluminum come from?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-02-brainstuff-aluminum.mp3</link>
            <description>Aluminum is both lightweight and strong, so it's no wonder that space stations, airplanes and thousands of other products use this metal. But where does it come from, and what makes it so special? Tune in to learn more.</description>
            <pubDate>Wed, 02 Mar 2011 12:10:16 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-02-brainstuff-aluminum.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-03-02-brainstuff-aluminum.mp3' length='1937020' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, aluminum, construction, engineering</itunes:keywords>
            <itunes:duration>00:05:07</itunes:duration>
            <itunes:subtitle>Aluminum is both lightweight and strong, so it's no wonder that space stations, airplanes and thousands of other products use this metal. But where does it come from, and what makes it so special? Tune in to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Semi Submarines</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-28-brainstuff-semi-submarine.mp3</link>
            <description>There's a reason that most submarines are owned by governments - they're incredibly expensive. So what's a sub-loving consumer to do? Tune in as Marshall Brain breaks down the science behind semi subs (and why it makes them so much less expensive).</description>
            <pubDate>Mon, 28 Feb 2011 14:17:15 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-28-brainstuff-semi-submarine.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-28-brainstuff-semi-submarine.mp3' length='2100972' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, semi submarine, submarine, water, boat, vessel</itunes:keywords>
            <itunes:duration>00:05:34</itunes:duration>
            <itunes:subtitle>There's a reason that most submarines are owned by governments - they're incredibly expensive. So what's a sub-loving consumer to do? Tune in as Marshall Brain breaks down the science behind semi subs (and why it makes them so much less expensive).</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Marshall Brain's News Roundup: February 25th, 2011</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-25-brainstuff-news-roundup-4.mp3</link>
            <description>Will the USB port become a thing of the past? How far will the price of solar power fall? Join Marshall Brain as he brings you the latest world news, from the death of the Guinea worm or the growth of private space exploration.</description>
            <pubDate>Fri, 25 Feb 2011 15:47:17 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-25-brainstuff-news-roundup-4.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-25-brainstuff-news-roundup-4.mp3' length='6179073' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, news roundup, current events, february 25</itunes:keywords>
            <itunes:duration>00:16:24</itunes:duration>
            <itunes:subtitle>Will the USB port become a thing of the past? How far will the price of solar power fall? Join Marshall Brain as he brings you the latest world news, from the death of the Guinea worm or the growth of private space exploration.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Can people really build missiles from scratch?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-23-brainstuff-salt-missile.mp3</link>
            <description>In the film Salt, Angelina Jolie's character creates a missile from handy household ingredients -- but could this happen in real life? Tune in as Marshall breaks down the science behind improvised explosives.</description>
            <pubDate>Wed, 23 Feb 2011 12:26:34 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-23-brainstuff-salt-missile.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-23-brainstuff-salt-missile.mp3' length='2142974' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, salt, missile, DIY explosive, ied</itunes:keywords>
            <itunes:duration>00:05:41</itunes:duration>
            <itunes:subtitle>In the film Salt, Angelina Jolie's character creates a missile from handy household ingredients -- but could this happen in real life? Tune in as Marshall breaks down the science behind improvised explosives.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do strokes work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-21-brainstuff-stroke.mp3</link>
            <description>In a stroke, something disrupts the normal blood supply to parts of the brain. Without oxygen, affected brain cells will begin to die. Tune in as Marshall explains the causes of -- and treatments for -- strokes.</description>
            <pubDate>Mon, 21 Feb 2011 00:07:19 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-21-brainstuff-stroke.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-21-brainstuff-stroke.mp3' length='1794717' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, stroke, heart disease, blood clot</itunes:keywords>
            <itunes:duration>00:04:43</itunes:duration>
            <itunes:subtitle>In a stroke, something disrupts the normal blood supply to parts of the brain. Without oxygen, affected brain cells will begin to die. Tune in as Marshall explains the causes of -- and treatments for -- strokes.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Marshall Brain's News Roundup 2-18-2011</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-18-brainstuff-news-roundup-3.mp3</link>
            <description>From Jeopardy's first nonhuman contestant to the secret recipe for Coca-Cola, this week has been packed with fascinating stories. Tune in as Marshall helps you catch up on the week's most interesting news.</description>
            <pubDate>Fri, 18 Feb 2011 17:10:49 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-18-brainstuff-news-roundup-3.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-18-brainstuff-news-roundup-3.mp3' length='5236783' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, news round up 3, news, zinc, coke, watson</itunes:keywords>
            <itunes:duration>00:13:45</itunes:duration>
            <itunes:subtitle>From Jeopardy's first nonhuman contestant to the secret recipe for Coca-Cola, this week has been packed with fascinating stories. Tune in as Marshall helps you catch up on the week's most interesting news.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does the snow dragon eat and digest snow?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-16-brainstuff-snow-dragon-eat-snow.mp3</link>
            <description>For cities plagued by yearly snowstorms, a fleet of snow plows and salt often aren't enough to get rid of excess drifts. Luckily, there's another option: Snow dragons. These machines can melt snow on the spot -- but how do they work? Tune in to find out.</description>
            <pubDate>Wed, 16 Feb 2011 15:35:18 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-16-brainstuff-snow-dragon-eat-snow.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-16-brainstuff-snow-dragon-eat-snow.mp3' length='1877028' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, snow dragon, snow, winter, snow plow</itunes:keywords>
            <itunes:duration>00:04:57</itunes:duration>
            <itunes:subtitle>For cities plagued by yearly snowstorms, a fleet of snow plows and salt often aren't enough to get rid of excess drifts. Luckily, there's another option: Snow dragons. These machines can melt snow on the spot -- but how do they work? Tune in to find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How did the moon get there?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-14-brainstuff-how-did-moon-get-there.mp3</link>
            <description>The moon has orbited over human civilization since the dawn of time, but it took us thousands of years to figure out how it actually got there. Tune in as Marshall Brain examines the formation of the moon.</description>
            <pubDate>Mon, 14 Feb 2011 13:33:09 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-14-brainstuff-how-did-moon-get-there.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-14-brainstuff-how-did-moon-get-there.mp3' length='2161013' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, moon, lunar formation, astronomy</itunes:keywords>
            <itunes:duration>00:05:44</itunes:duration>
            <itunes:subtitle>The moon has orbited over human civilization since the dawn of time, but it took us thousands of years to figure out how it actually got there. Tune in as Marshall Brain examines the formation of the moon.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Marshall Brain's News Roundup No. 2</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-11-brainstuff-news-roundup-2.mp3</link>
            <description>Each Friday, Marshall Brain brings you the latest news of the week in one handy podcast. Want to know what's shaking in the world of technology, science and more? Then tune in for a dose of BrainStuff.</description>
            <pubDate>Fri, 11 Feb 2011 13:01:18 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-11-brainstuff-news-roundup-2.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-11-brainstuff-news-roundup-2.mp3' length='7316026' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, news roundup, current events</itunes:keywords>
            <itunes:duration>00:20:03</itunes:duration>
            <itunes:subtitle>Each Friday, Marshall Brain brings you the latest news of the week in one handy podcast. Want to know what's shaking in the world of technology, science and more? Then tune in for a dose of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do 3D movies cause headaches?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-09-brainstuff-3d-headache.mp3</link>
            <description>Although 3-dimensional movies have become increasingly popular, numerous viewers have complained of headaches while watching these films. Why? Tune in as HowStuffWorks.com founder Marshall Brain breaks down the science behind 3D films.</description>
            <pubDate>Wed, 09 Feb 2011 15:24:23 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-09-brainstuff-3d-headache.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-09-brainstuff-3d-headache.mp3' length='1547246' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, 3d, 3d movie, three dimensional</itunes:keywords>
            <itunes:duration>00:04:02</itunes:duration>
            <itunes:subtitle>Although 3-dimensional movies have become increasingly popular, numerous viewers have complained of headaches while watching these films. Why? Tune in as HowStuffWorks.com founder Marshall Brain breaks down the science behind 3D films.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How is olive oil made?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-07-brainstuff-olive-oil.mp3</link>
            <description>People across the planet love olive oil, and it's not hard to see why: This tasty liquid lends flavor to hundreds of dishes, and it's been used for thousands of years. But how does it get from the tree to the bottle? Tune in to find out.</description>
            <pubDate>Mon, 07 Feb 2011 16:39:05 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-07-brainstuff-olive-oil.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-07-brainstuff-olive-oil.mp3' length='2797821' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, olive oil, gastronomy, food, olives</itunes:keywords>
            <itunes:duration>00:07:38</itunes:duration>
            <itunes:subtitle>People across the planet love olive oil, and it's not hard to see why: This tasty liquid lends flavor to hundreds of dishes, and it's been used for thousands of years. But how does it get from the tree to the bottle? Tune in to find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Marshall Brain's News Roundup No. 1</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-04-brainstuff-news-roundup-1.mp3</link>
            <description>What's the deal with the UFO sighting in Jerusalem? Will the high schools of the future be filled with telepresence robots? Tune in and join Marshall Brain as he reviews the week's most fascinating news.</description>
            <pubDate>Fri, 04 Feb 2011 16:16:14 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-04-brainstuff-news-roundup-1.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-04-brainstuff-news-roundup-1.mp3' length='4393237' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, news roundup, recent events, brainstuff</itunes:keywords>
            <itunes:duration>00:11:56</itunes:duration>
            <itunes:subtitle>What's the deal with the UFO sighting in Jerusalem? Will the high schools of the future be filled with telepresence robots? Tune in and join Marshall Brain as he reviews the week's most fascinating news.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What will airplanes look like in 2025?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-02-brainstuff-airplanes-2025.mp3</link>
            <description>Most modern airplanes have a similar design, but NASA has a plan to move the world of aviation into the future by partnering with the world's airplane manufacturers to radically redesign the typical airplane. Tune in to learn more.</description>
            <pubDate>Wed, 02 Feb 2011 15:57:08 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-02-brainstuff-airplanes-2025.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-02-02-brainstuff-airplanes-2025.mp3' length='2062281' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, airplane, 2025, nasa airplane</itunes:keywords>
            <itunes:duration>00:05:28</itunes:duration>
            <itunes:subtitle>Most modern airplanes have a similar design, but NASA has a plan to move the world of aviation into the future by partnering with the world's airplane manufacturers to radically redesign the typical airplane. Tune in to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Proton Therapy Works</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-31-brainstuff-proton-therapy.mp3</link>
            <description>As a method of treating cancer, proton therapy has great potential. But how does it work, exactly, and what makes it superior to other forms of cancer treatment? Tune in and find out.</description>
            <pubDate>Mon, 31 Jan 2011 15:46:36 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-31-brainstuff-proton-therapy.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-31-brainstuff-proton-therapy.mp3' length='2133111' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, proton therapy, medicine,</itunes:keywords>
            <itunes:duration>00:05:40</itunes:duration>
            <itunes:subtitle>As a method of treating cancer, proton therapy has great potential. But how does it work, exactly, and what makes it superior to other forms of cancer treatment? Tune in and find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can a valet rip you off?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-28-brainstuff-valet-scam.mp3</link>
            <description>Once relegated to high-end restaurants and clubs, valets are increasingly common across the United States. But how can you trust your valet -- and how will you know if the valet is scamming you? Tune in and find out.</description>
            <pubDate>Fri, 28 Jan 2011 15:14:36 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-28-brainstuff-valet-scam.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-28-brainstuff-valet-scam.mp3' length='2059920' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, valet, valet scam</itunes:keywords>
            <itunes:duration>00:05:28</itunes:duration>
            <itunes:subtitle>Once relegated to high-end restaurants and clubs, valets are increasingly common across the United States. But how can you trust your valet -- and how will you know if the valet is scamming you? Tune in and find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can we eliminate fossil fuels?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-26-brainstuff-diy-biofuels.mp3</link>
            <description>It's no secret that fossil fuels have a detrimental effect on the environment, but do feasible alternatives exist? In this episode, Marshall takes a look at the possibilities of DIY biofuel.</description>
            <pubDate>Wed, 26 Jan 2011 16:10:27 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-26-brainstuff-diy-biofuels.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-26-brainstuff-diy-biofuels.mp3' length='3123553' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, diy biofuel, fossil fuel, algae, alternative energy</itunes:keywords>
            <itunes:duration>00:08:25</itunes:duration>
            <itunes:subtitle>It's no secret that fossil fuels have a detrimental effect on the environment, but do feasible alternatives exist? In this episode, Marshall takes a look at the possibilities of DIY biofuel.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is the difference between good and bad toy helicopters?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-24-brainstuff-toy-helicopters.mp3</link>
            <description>Can you buy a good, long-lasting toy helicopter for under $30?</description>
            <pubDate>Mon, 24 Jan 2011 17:09:19 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-24-brainstuff-toy-helicopters.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-24-brainstuff-toy-helicopters.mp3' length='2619197' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, helicopter, toy, toy helicopter, flying, present, rf control, radio controlled helicopter</itunes:keywords>
            <itunes:duration>00:04:50</itunes:duration>
            <itunes:subtitle>Can you buy a good, long-lasting toy helicopter for under $30?</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a restraining order, and how do you get one?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-21-brainstuff-restraining-order.mp3</link>
            <description>Restraining orders are cropping up in the news more and more frequently, but how do they work? Join Marshall Brain as he breaks down the legality of restraining orders -- and how to get one.</description>
            <pubDate>Fri, 21 Jan 2011 16:53:18 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-21-brainstuff-restraining-order.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-21-brainstuff-restraining-order.mp3' length='1825153' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>Restraining orders are cropping up in the news more and more frequently, but how do they work? Join Marshall Brain as he breaks down the legality of restraining orders -- and how to get one.</itunes:keywords>
            <itunes:duration>00:04:48</itunes:duration>
            <itunes:subtitle>Restraining orders are cropping up in the news more and more frequently, but how do they work? Join Marshall Brain as he breaks down the legality of restraining orders -- and how to get one.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Can we make gasoline from bacteria?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-19-brainstuff-joule-unlimited.mp3</link>
            <description>A new company is claiming that, next year, the problems of carbon emissions, foreign oil dependence, oil spills, fuel shortages, etc. will all end due to a breakthrough in biotechnology.  Is it true?</description>
            <pubDate>Wed, 19 Jan 2011 15:23:40 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-19-brainstuff-joule-unlimited.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-19-brainstuff-joule-unlimited.mp3' length='2281843' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, joule, gasoline, joule unlimited, biosynthesis, fuels, gas, fossil fuels</itunes:keywords>
            <itunes:duration>00:06:04</itunes:duration>
            <itunes:subtitle>A new company is claiming that, next year, the problems of carbon emissions, foreign oil dependence, oil spills, fuel shortages, etc. will all end due to a breakthrough in biotechnology.  Is it true?</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Anti-reflective coatings</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-17-brainstuff-anti-reflective-coating.mp3</link>
            <description>Anti-reflective coatings are used to eliminate any light reflective off the back of the lenses. Learn about anti-reflective coatings in this BrainStuff episode.</description>
            <pubDate>Mon, 17 Jan 2011 13:06:33 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-17-brainstuff-anti-reflective-coating.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-17-brainstuff-anti-reflective-coating.mp3' length='1516203' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, glasses, anti reflective, reflections, coatings, lens, sunglasses, howstuffworks</itunes:keywords>
            <itunes:duration>00:03:56</itunes:duration>
            <itunes:subtitle>Anti-reflective coatings are used to eliminate any light reflective off the back of the lenses. Learn about anti-reflective coatings in this BrainStuff episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Can picking a movie theater get any more complicated?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-14-brainstuff-movie-theaters.mp3</link>
            <description>With all the recent technological breakthroughs, choosing the right movie theatre has become increasingly complex. Why? Listen in as Marshall breaks down the different sound and video technologies available in modern movie theaters.</description>
            <pubDate>Fri, 14 Jan 2011 17:40:47 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-14-brainstuff-movie-theaters.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-14-brainstuff-movie-theaters.mp3' length='1642052' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, movie theater, surround sound, 3d, digital sound</itunes:keywords>
            <itunes:duration>00:04:18</itunes:duration>
            <itunes:subtitle>With all the recent technological breakthroughs, choosing the right movie theatre has become increasingly complex. Why? Listen in as Marshall breaks down the different sound and video technologies available in modern movie theaters.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can you drive across Antarctica?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-12-brainstuff-antarctic-expedition.mp3</link>
            <description>Given that it's more than 2,000 miles across and without a gas station in sight, driving across Antarctica is a daunting task. Tune in as Marshall Brain explains how it works.</description>
            <pubDate>Wed, 12 Jan 2011 18:32:28 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-12-brainstuff-antarctic-expedition.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-12-brainstuff-antarctic-expedition.mp3' length='1495667' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, drive across antarctica, polar vehicle</itunes:keywords>
            <itunes:duration>00:03:53</itunes:duration>
            <itunes:subtitle>Given that it's more than 2,000 miles across and without a gas station in sight, driving across Antarctica is a daunting task. Tune in as Marshall Brain explains how it works.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is the coolest stuff from the 2011 edition of CES?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-10-brainstuff-ces-2011.mp3</link>
            <description>When it came to gadgets, the 2011 Consumer Electronics Show did not disappoint. But which new products were the coolest? Tune in as Marshall Brain breaks down the latest and greatest of the CES in this podcast.</description>
            <pubDate>Mon, 10 Jan 2011 13:00:42 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-10-brainstuff-ces-2011.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-10-brainstuff-ces-2011.mp3' length='2983851' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, ces, consumer electronics show, 2011</itunes:keywords>
            <itunes:duration>00:08:01</itunes:duration>
            <itunes:subtitle>When it came to gadgets, the 2011 Consumer Electronics Show did not disappoint. But which new products were the coolest? Tune in as Marshall Brain breaks down the latest and greatest of the CES in this podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is there an easy way to understand how time zones work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-07-brainstuff-time-zones.mp3</link>
            <description>There are 24 different time zones -- but why do we have them? In this podcast, Marshall recounts how society evolved time zones, and also gives you an easy way to model the structure of time zones across the globe.</description>
            <pubDate>Fri, 07 Jan 2011 14:19:21 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-07-brainstuff-time-zones.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-07-brainstuff-time-zones.mp3' length='2138113' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, time zones, GMT, new year's, global time</itunes:keywords>
            <itunes:duration>00:05:41</itunes:duration>
            <itunes:subtitle>There are 24 different time zones -- but why do we have them? In this podcast, Marshall recounts how society evolved time zones, and also gives you an easy way to model the structure of time zones across the globe.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Do Power Balance Wristbands really work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-05-brainstuff-power-balance.mp3</link>
            <description>Do Power Balance Wristbands really work?  Find out in this BrainStuff podcast by Marshall Brain.</description>
            <pubDate>Wed, 05 Jan 2011 15:59:56 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-05-brainstuff-power-balance.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-05-brainstuff-power-balance.mp3' length='2069790' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, Marshall brain, power balance wristband, power balance bracelet, balance, scam</itunes:keywords>
            <itunes:duration>00:05:29</itunes:duration>
            <itunes:subtitle>Do Power Balance Wristbands really work?  Find out in this BrainStuff podcast by Marshall Brain.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why are West Coast waves bigger than East Coast waves?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-03-brainstuff-waves.mp3</link>
            <description>The West Coast of the United States seems to produce bigger, more impressive waves than the East Coast. But why? In this episode, Marshall explains the various factors that make West Coast waves bigger and better.</description>
            <pubDate>Mon, 03 Jan 2011 09:05:38 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-03-brainstuff-waves.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2011-01-03-brainstuff-waves.mp3' length='1656775' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, West Coast, East Coast, waves, fetch, oceanography</itunes:keywords>
            <itunes:duration>00:04:20</itunes:duration>
            <itunes:subtitle>The West Coast of the United States seems to produce bigger, more impressive waves than the East Coast. But why? In this episode, Marshall explains the various factors that make West Coast waves bigger and better.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why use a humidifier in your home in the winter?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-31-brainstuff-humidifiers.mp3</link>
            <description>Lots of people use humidifiers in their homes, especially in winter. But why? Marshall discusses some advantages of using humidifiers (and disadvantages of not using them) and different types of home humidifiers.</description>
            <pubDate>Fri, 31 Dec 2010 06:06:50 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-31-brainstuff-humidifiers.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-31-brainstuff-humidifiers.mp3' length='1453497' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, console humidifier, humidifiers, dry winter air, humidity</itunes:keywords>
            <itunes:duration>00:03:46</itunes:duration>
            <itunes:subtitle>Lots of people use humidifiers in their homes, especially in winter. But why? Marshall discusses some advantages of using humidifiers (and disadvantages of not using them) and different types of home humidifiers.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Tiny Houses</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-24-brainstuff-tiny-house.mp3</link>
            <description>Tiny houses are part of a growing trend, but why would someone want an itty bitty house? In this episode, Marshall talks about the benefits and challenges of building a tiny home.</description>
            <pubDate>Fri, 24 Dec 2010 00:56:26 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-24-brainstuff-tiny-house.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-24-brainstuff-tiny-house.mp3' length='1407887' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, tiny houses, Popomo, building a tiny house</itunes:keywords>
            <itunes:duration>00:03:38</itunes:duration>
            <itunes:subtitle>Tiny houses are part of a growing trend, but why would someone want an itty bitty house? In this episode, Marshall talks about the benefits and challenges of building a tiny home.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is Schadenfreude?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-22-brainstuff-schadenfreude.mp3</link>
            <description>Schadenfreude is a German word that means taking pleasure in someone else's pain. But it's not the same as sadism, as Marshall Brain explains in this episode.</description>
            <pubDate>Wed, 22 Dec 2010 13:11:29 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-22-brainstuff-schadenfreude.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-22-brainstuff-schadenfreude.mp3' length='1396143' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, Schadenfreude, compassion, taking pleasure in others' pain</itunes:keywords>
            <itunes:duration>00:03:36</itunes:duration>
            <itunes:subtitle>Schadenfreude is a German word that means taking pleasure in someone else's pain. But it's not the same as sadism, as Marshall Brain explains in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a cyberwar, and what tactics do cyber warriors use?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-20-brainstuff-cyber-warfare.mp3</link>
            <description>Modern warfare has expanded beyond its tradtional venues and tactics, infiltrating the world of cyberspace. In this episode, Marshall discusses the many forms of cyber warfare, from computer hacking to viruses.</description>
            <pubDate>Mon, 20 Dec 2010 15:15:15 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-20-brainstuff-cyber-warfare.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-20-brainstuff-cyber-warfare.mp3' length='1963558' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, cyber warfare, cyber warriors, dos attack, WikiLeaks</itunes:keywords>
            <itunes:duration>00:05:11</itunes:duration>
            <itunes:subtitle>Modern warfare has expanded beyond its tradtional venues and tactics, infiltrating the world of cyberspace. In this episode, Marshall discusses the many forms of cyber warfare, from computer hacking to viruses.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is it possible to get free land and free houses in the U.S.?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-17-brainstuff-free-land.mp3</link>
            <description>In the 1860s, the Homestead Act provided free land to settlers. Is there anything like that in 2010? In this episode, Marshall explains why and how it's possible to acquire land and houses for free -- or really cheaply -- in the United States today.</description>
            <pubDate>Fri, 17 Dec 2010 16:42:07 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-17-brainstuff-free-land.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-17-brainstuff-free-land.mp3' length='2200684' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, Homestead Act, free land, free houses</itunes:keywords>
            <itunes:duration>00:05:50</itunes:duration>
            <itunes:subtitle>In the 1860s, the Homestead Act provided free land to settlers. Is there anything like that in 2010? In this episode, Marshall explains why and how it's possible to acquire land and houses for free -- or really cheaply -- in the United States today.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does Nitroglycerin work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-15-brainstuff-nitro.mp3</link>
            <description>What do you get when you combine acids and glycerin? Nitroglycerin! What is this substance used for, and why is it so unstable? In this episode, Marshall takes a look at the chemistry and explosive qualities of Nitrogyclerin.</description>
            <pubDate>Wed, 15 Dec 2010 16:01:44 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-15-brainstuff-nitro.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-15-brainstuff-nitro.mp3' length='1008387' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, nitroglycerin, liquid explosives, glycerin</itunes:keywords>
            <itunes:duration>00:02:32</itunes:duration>
            <itunes:subtitle>What do you get when you combine acids and glycerin? Nitroglycerin! What is this substance used for, and why is it so unstable? In this episode, Marshall takes a look at the chemistry and explosive qualities of Nitrogyclerin.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does fusion power work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-13-brainstuff-fusion-power.mp3</link>
            <description>Fusion reactors like the sun produce huge amounts of energy, so why aren't there fusion power plants everywhere? In this episode, Marshall explains the chemistry of fusion reactions and discusses how close fusion is to becoming a viable energy source.</description>
            <pubDate>Mon, 13 Dec 2010 15:31:52 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-13-brainstuff-fusion-power.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-13-brainstuff-fusion-power.mp3' length='2067129' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, fusion power, fusion reactor, hydrogen, helium</itunes:keywords>
            <itunes:duration>00:05:28</itunes:duration>
            <itunes:subtitle>Fusion reactors like the sun produce huge amounts of energy, so why aren't there fusion power plants everywhere? In this episode, Marshall explains the chemistry of fusion reactions and discusses how close fusion is to becoming a viable energy source.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is Friday the 13th considered unlucky?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-10-brainstuff-friday-the-13th.mp3</link>
            <description>In countries like the United States, people have a superstitious fear of one particular date: Friday the 13th. But why? In this episode, Marshall discusses the two main fears that have fueled the Friday the 13th superstitions, as well as their origins.</description>
            <pubDate>Fri, 10 Dec 2010 14:00:49 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-10-brainstuff-friday-the-13th.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-10-brainstuff-friday-the-13th.mp3' length='1734553' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, Friday the 13th superstitions, fear of Fridays</itunes:keywords>
            <itunes:duration>00:04:33</itunes:duration>
            <itunes:subtitle>In countries like the United States, people have a superstitious fear of one particular date: Friday the 13th. But why? In this episode, Marshall discusses the two main fears that have fueled the Friday the 13th superstitions, as well as their origins.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does WikiLeaks work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-08-brainstuff-wikileaks.mp3</link>
            <description>WikiLeaks is a controversial &quot;not-for-profit media organization&quot; that disseminates secret, leaked information to the public. But how exactly does this group work? And why does it exist? Marshall Brain takes a look at WikiLeaks in this episode.</description>
            <pubDate>Wed, 08 Dec 2010 15:38:34 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-08-brainstuff-wikileaks.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-08-brainstuff-wikileaks.mp3' length='1844563' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, WikiLeaks, Julian Assange</itunes:keywords>
            <itunes:duration>00:04:51</itunes:duration>
            <itunes:subtitle>WikiLeaks is a controversial &quot;not-for-profit media organization&quot; that disseminates secret, leaked information to the public. But how exactly does this group work? And why does it exist? Marshall Brain takes a look at WikiLeaks in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is there a way to make my sunglasses scratch-resistant?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-06-brainstuff-scratch-resist-coating.mp3</link>
            <description>Sunglasses have various special coatings: Some are reflective, while others are scratch-resistant. In this episode, Marshall explains how these different coatings work.</description>
            <pubDate>Mon, 06 Dec 2010 15:13:56 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-06-brainstuff-scratch-resist-coating.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-06-brainstuff-scratch-resist-coating.mp3' length='1198817' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, scratch-resistant sunglasses, half-silvered surface, reflective sunglasses, scratch-resistant</itunes:keywords>
            <itunes:duration>00:03:04</itunes:duration>
            <itunes:subtitle>Sunglasses have various special coatings: Some are reflective, while others are scratch-resistant. In this episode, Marshall explains how these different coatings work.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How valuable is exercise to your health?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-03-brainstuff-exercise-valuable.mp3</link>
            <description>We all know that exercise is an important way to safeguard your health. But how, exactly? In this episode, Marshall discusses the health benefits of exercise -- and how much we need each week in order to take advantage of these benefits.</description>
            <pubDate>Fri, 03 Dec 2010 11:29:30 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-03-brainstuff-exercise-valuable.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-03-brainstuff-exercise-valuable.mp3' length='1327511' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, health benefits of exercise, exercise valuable</itunes:keywords>
            <itunes:duration>00:03:25</itunes:duration>
            <itunes:subtitle>We all know that exercise is an important way to safeguard your health. But how, exactly? In this episode, Marshall discusses the health benefits of exercise -- and how much we need each week in order to take advantage of these benefits.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can I make artificial snow in my backyard?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-01-brainstuff-backyard-snow.mp3</link>
            <description>If you live in a cold enough climate, you can make fake snow just like they do for ski resorts. In this episode, Marshall shares two techniques for creating artificial snow in your own backyard -- and what to do if you live in a warm climate.</description>
            <pubDate>Wed, 01 Dec 2010 13:21:39 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-01-brainstuff-backyard-snow.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-12-01-brainstuff-backyard-snow.mp3' length='1229871' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, making artificial snow, fake snow</itunes:keywords>
            <itunes:duration>00:03:09</itunes:duration>
            <itunes:subtitle>If you live in a cold enough climate, you can make fake snow just like they do for ski resorts. In this episode, Marshall shares two techniques for creating artificial snow in your own backyard -- and what to do if you live in a warm climate.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What's the best way to back up a computer's hard disk?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-29-brainstuff-backup-hard-disk.mp3</link>
            <description>Your computer's hard disk stores all your information, but what happens if it gets damaged or dies? In this episode, Marshall Brain explains why it's important to back up your hard disk and weighs the advantages and disadvantages of three backup methods.</description>
            <pubDate>Mon, 29 Nov 2010 13:02:11 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-29-brainstuff-backup-hard-disk.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-29-brainstuff-backup-hard-disk.mp3' length='2506169' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, offsite backup, backing up a hard disk</itunes:keywords>
            <itunes:duration>00:06:40</itunes:duration>
            <itunes:subtitle>Your computer's hard disk stores all your information, but what happens if it gets damaged or dies? In this episode, Marshall Brain explains why it's important to back up your hard disk and weighs the advantages and disadvantages of three backup methods.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do they create patterns in a baseball field?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-26-brainstuff-patterns-baseball-field.mp3</link>
            <description>Groundskeepers at baseball fields create patterns using a process called lawn striping. Tune in to find out how this process works -- and how you can duplicate it to create designs in your own yard.</description>
            <pubDate>Fri, 26 Nov 2010 00:35:29 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-26-brainstuff-patterns-baseball-field.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-26-brainstuff-patterns-baseball-field.mp3' length='1121256' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, patterns in a baseball field, lawn striping</itunes:keywords>
            <itunes:duration>00:02:51</itunes:duration>
            <itunes:subtitle>Groundskeepers at baseball fields create patterns using a process called lawn striping. Tune in to find out how this process works -- and how you can duplicate it to create designs in your own yard.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What are dissolvable stitches?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-24-brainstuff-dissolvable-stitches.mp3</link>
            <description>Stitches have been used for centuries, but dissolvable ones are the most common these days. Why would you want stitches to dissolve, and how do they work?  In this episode, Marshall discusses the benefits and features of absorbable sutures.</description>
            <pubDate>Wed, 24 Nov 2010 12:12:43 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-24-brainstuff-dissolvable-stitches.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-24-brainstuff-dissolvable-stitches.mp3' length='1330949' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, dissolvable stitches, absorbable sutures, non-absorbable sutures</itunes:keywords>
            <itunes:duration>00:03:26</itunes:duration>
            <itunes:subtitle>Stitches have been used for centuries, but dissolvable ones are the most common these days. Why would you want stitches to dissolve, and how do they work?  In this episode, Marshall discusses the benefits and features of absorbable sutures.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a direct-injection 2-stroke engine work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-22-brainstuff-direct-injection-2-stroke.mp3</link>
            <description>In a previous episode, Marshall explained how 4-stroke, direct-injection engines work; In this one, he takes a look at 2-stroke engines that utilize direct injection technology.</description>
            <pubDate>Mon, 22 Nov 2010 16:15:41 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-22-brainstuff-direct-injection-2-stroke.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-22-brainstuff-direct-injection-2-stroke.mp3' length='2131726' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, direct injection 2-stroke engines, 4-stroke engines</itunes:keywords>
            <itunes:duration>00:05:43</itunes:duration>
            <itunes:subtitle>In a previous episode, Marshall explained how 4-stroke, direct-injection engines work; In this one, he takes a look at 2-stroke engines that utilize direct injection technology.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do airport scanners work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-19-brainstuff-tsa-scanners.mp3</link>
            <description>The new full-body scanners used at airports in the United States have caused a huge controversy -- but how do they work? In this episode, Marshall breaks down the science behind full-body scanners, along with the uproar they've caused.</description>
            <pubDate>Fri, 19 Nov 2010 12:52:14 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-19-brainstuff-tsa-scanners.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-19-brainstuff-tsa-scanners.mp3' length='3015846' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, marshall, tsa scanner, full body scanner, airport security</itunes:keywords>
            <itunes:duration>00:08:15</itunes:duration>
            <itunes:subtitle>The new full-body scanners used at airports in the United States have caused a huge controversy -- but how do they work? In this episode, Marshall breaks down the science behind full-body scanners, along with the uproar they've caused.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Which 4G services are available in the U.S. today?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-17-brainstuff-4g-phone-systems-us.mp3</link>
            <description>If you have a smart phone, you may be interested in 4G service for the data you receive. But which services are available, and which one will suit your needs? Listen in as Marshall Brain breaks down the differences between 4G services.</description>
            <pubDate>Wed, 17 Nov 2010 11:24:33 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-17-brainstuff-4g-phone-systems-us.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-17-brainstuff-4g-phone-systems-us.mp3' length='1140253' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, 4G, phone, US, smartphone</itunes:keywords>
            <itunes:duration>00:03:03</itunes:duration>
            <itunes:subtitle>If you have a smart phone, you may be interested in 4G service for the data you receive. But which services are available, and which one will suit your needs? Listen in as Marshall Brain breaks down the differences between 4G services.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What are the fastest hard disks available today?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-15-brainstuff-fastest-hard-disk.mp3</link>
            <description>Hard disk drives and connections have been getting faster and faster. In this episode, Marshall discusses the evolution of the hard disk and the shockingly fast drives available today.</description>
            <pubDate>Mon, 15 Nov 2010 13:44:54 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-15-brainstuff-fastest-hard-disk.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-15-brainstuff-fastest-hard-disk.mp3' length='1106366' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, fastest hard disks</itunes:keywords>
            <itunes:duration>00:02:56</itunes:duration>
            <itunes:subtitle>Hard disk drives and connections have been getting faster and faster. In this episode, Marshall discusses the evolution of the hard disk and the shockingly fast drives available today.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is an autograph worth?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-12-brainstuff-autographs.mp3</link>
            <description>An autograph is a famous person's signature, but what determines how valuable it is? Marshall Brain discusses the relative value of autographs -- and what you can do to increase the value of your own signature.</description>
            <pubDate>Fri, 12 Nov 2010 12:28:39 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-12-brainstuff-autographs.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-12-brainstuff-autographs.mp3' length='1604295' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, what is an autography worth, autographs</itunes:keywords>
            <itunes:duration>00:04:19</itunes:duration>
            <itunes:subtitle>An autograph is a famous person's signature, but what determines how valuable it is? Marshall Brain discusses the relative value of autographs -- and what you can do to increase the value of your own signature.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do terrorist bombs work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-10-brainstuff-terrorist-bombs.mp3</link>
            <description>Terrorists have a new way of getting bombs into the United States: mailing them. In this episode, Marshall breaks down the science behind the types of bombs used by terrorists, and the explosive ingredients involved.</description>
            <pubDate>Wed, 10 Nov 2010 15:53:08 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-10-brainstuff-terrorist-bombs.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-10-brainstuff-terrorist-bombs.mp3' length='2127630' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, terrorism, bomb, explosive, truck bomb, pipe bomb</itunes:keywords>
            <itunes:duration>00:05:47</itunes:duration>
            <itunes:subtitle>Terrorists have a new way of getting bombs into the United States: mailing them. In this episode, Marshall breaks down the science behind the types of bombs used by terrorists, and the explosive ingredients involved.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is superconductivity?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-08-brainstuff-superconductors.mp3</link>
            <description>Superconductive materials have no electrical resistance, but why is superconductivity a big deal? Marshall Brain explains the potential benefits and implications of superconductive materials, as well as how they work, in this episode.</description>
            <pubDate>Mon, 08 Nov 2010 16:25:37 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-08-brainstuff-superconductors.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-08-brainstuff-superconductors.mp3' length='1945188' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, superconductivity, superconductors, electrical resistance, electrons, superconducting materials</itunes:keywords>
            <itunes:duration>00:05:16</itunes:duration>
            <itunes:subtitle>Superconductive materials have no electrical resistance, but why is superconductivity a big deal? Marshall Brain explains the potential benefits and implications of superconductive materials, as well as how they work, in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a fossil?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-05-brainstuff-fossils.mp3</link>
            <description>Fossils provide us with an important picture of ancient life. But how is a fossil created, exactly? Marshall Brain breaks down the various natural processes behind fossilization in this episode.</description>
            <pubDate>Fri, 05 Nov 2010 16:52:18 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-05-brainstuff-fossils.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-05-brainstuff-fossils.mp3' length='1979504' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, fossils, fossilization, coprolite, fossilized animals, fossilized plants</itunes:keywords>
            <itunes:duration>00:05:22</itunes:duration>
            <itunes:subtitle>Fossils provide us with an important picture of ancient life. But how is a fossil created, exactly? Marshall Brain breaks down the various natural processes behind fossilization in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do gasoline direct injection engines work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-03-brainstuff-gasoline-direct-injection.mp3</link>
            <description>The latest improvement on the internal combustion engine is called gasoline direct injection. In this episode, Marshall explains how gasoline direct injection technology works -- and how soon we'll see it in production vehicles.</description>
            <pubDate>Wed, 03 Nov 2010 16:03:36 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-03-brainstuff-gasoline-direct-injection.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-03-brainstuff-gasoline-direct-injection.mp3' length='2010097' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, gasoline direct injection engines, internal combustion engines</itunes:keywords>
            <itunes:duration>00:05:27</itunes:duration>
            <itunes:subtitle>The latest improvement on the internal combustion engine is called gasoline direct injection. In this episode, Marshall explains how gasoline direct injection technology works -- and how soon we'll see it in production vehicles.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Do you have a hidden savant inside your brain?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-01-brainstuff-hidden-savant.mp3</link>
            <description>Savant capabilities seem extraordinary, but what if they aren't? What if we all have amazing talents embedded in our brains? In this episode, Marshall discusses different techniques that have revealed savant-like qualities in ordinary people.</description>
            <pubDate>Mon, 01 Nov 2010 13:29:19 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-01-brainstuff-hidden-savant.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-11-01-brainstuff-hidden-savant.mp3' length='1878753' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, hidden savant, transcranial magnetic stimulation, savants</itunes:keywords>
            <itunes:duration>00:05:05</itunes:duration>
            <itunes:subtitle>Savant capabilities seem extraordinary, but what if they aren't? What if we all have amazing talents embedded in our brains? In this episode, Marshall discusses different techniques that have revealed savant-like qualities in ordinary people.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What can you do to make yourself really unhappy?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-29-brainstuff-unhappy.mp3</link>
            <description>There are lots of articles and research on happiness these days, but what about unhappiness? What makes us unhappy, and will avoiding it make us happy? In this episode, Marshall points out three behaviors that are sure to create unhappiness.</description>
            <pubDate>Fri, 29 Oct 2010 18:01:16 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-29-brainstuff-unhappy.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-29-brainstuff-unhappy.mp3' length='1747411' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, happiness, unhappy, ways to make yourself unhappy</itunes:keywords>
            <itunes:duration>00:04:43</itunes:duration>
            <itunes:subtitle>There are lots of articles and research on happiness these days, but what about unhappiness? What makes us unhappy, and will avoiding it make us happy? In this episode, Marshall points out three behaviors that are sure to create unhappiness.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What does a modern smart house look like?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-27-brainstuff-smart-house.mp3</link>
            <description>What makes a &quot;smart&quot; house so smart? These high-tech houses intelligently use resources and are responsive to the needs and habits of their occupants. Tune in to learn more.</description>
            <pubDate>Wed, 27 Oct 2010 15:38:42 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-27-brainstuff-smart-house.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-27-brainstuff-smart-house.mp3' length='1911192' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, smart houses, smart systems, green houses, resources</itunes:keywords>
            <itunes:duration>00:05:11</itunes:duration>
            <itunes:subtitle>What makes a &quot;smart&quot; house so smart? These high-tech houses intelligently use resources and are responsive to the needs and habits of their occupants. Tune in to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a Dippy Bird work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-25-brainstuff-dippy-bird.mp3</link>
            <description>A Dippy Bird is a strange-looking novelty toy, but how does it work? Marshall Brain breaks down the surprisingly sophisticated mechanics of the Dippy Bird in this episode.</description>
            <pubDate>Mon, 25 Oct 2010 12:52:27 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-25-brainstuff-dippy-bird.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-25-brainstuff-dippy-bird.mp3' length='1418404' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, dippy bird, novelty toys, methylene chloride, pressure</itunes:keywords>
            <itunes:duration>00:03:48</itunes:duration>
            <itunes:subtitle>A Dippy Bird is a strange-looking novelty toy, but how does it work? Marshall Brain breaks down the surprisingly sophisticated mechanics of the Dippy Bird in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What are motion cards and how do they work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-22-brainstuff-motion-cards.mp3</link>
            <description>Motion cards, which have been around for decades, give the illusion of motion using  multiple images and a special printing process. In this episode, Marshall discusses the technology behind motion cards and how it has improved over the years.</description>
            <pubDate>Fri, 22 Oct 2010 14:41:17 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-22-brainstuff-motion-cards.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-22-brainstuff-motion-cards.mp3' length='1107145' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, matt, rachel, motion cards, lenticular printing, lenticule</itunes:keywords>
            <itunes:duration>00:02:57</itunes:duration>
            <itunes:subtitle>Motion cards, which have been around for decades, give the illusion of motion using  multiple images and a special printing process. In this episode, Marshall discusses the technology behind motion cards and how it has improved over the years.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do self-driving cars work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-20-brainstuff-self-driving-cars.mp3</link>
            <description>Self-driving cars seem like the stuff of science fiction, but they're closer to becoming reality than you might think. In this episode, Marshall breaks down the technology behind experimental self-driving cars.</description>
            <pubDate>Wed, 20 Oct 2010 12:26:27 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-20-brainstuff-self-driving-cars.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-20-brainstuff-self-driving-cars.mp3' length='2240337' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, self-driving cars, self-driving car technology</itunes:keywords>
            <itunes:duration>00:06:05</itunes:duration>
            <itunes:subtitle>Self-driving cars seem like the stuff of science fiction, but they're closer to becoming reality than you might think. In this episode, Marshall breaks down the technology behind experimental self-driving cars.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does satellite Internet work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-18-brainstuff-satellite-internet.mp3</link>
            <description>If you're trying to access the Internet in a very rural or remote place, satellite Internet is probably your best bet. In this episode, Marshall explains how satellite Internet works.</description>
            <pubDate>Mon, 18 Oct 2010 13:00:49 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-18-brainstuff-satellite-internet.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-18-brainstuff-satellite-internet.mp3' length='2195121' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, satellite Internet, Internet access, IP multicasting, rural</itunes:keywords>
            <itunes:duration>00:03:35</itunes:duration>
            <itunes:subtitle>If you're trying to access the Internet in a very rural or remote place, satellite Internet is probably your best bet. In this episode, Marshall explains how satellite Internet works.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How did instant cameras work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-15-brainstuff-instant-film.mp3</link>
            <description>Instant cameras made it possible to see a photograph almost immediately after you'd taken it. But how? In this episode, Marshall explains the chemical processes behind regular and instant photographic film.</description>
            <pubDate>Fri, 15 Oct 2010 14:54:16 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-15-brainstuff-instant-film.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-15-brainstuff-instant-film.mp3' length='4067410' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, instant cameras, instant film, film developing process</itunes:keywords>
            <itunes:duration>00:06:42</itunes:duration>
            <itunes:subtitle>Instant cameras made it possible to see a photograph almost immediately after you'd taken it. But how? In this episode, Marshall explains the chemical processes behind regular and instant photographic film.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>When you have an itch, what's happening under your skin?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-13-brainstuff-itching.mp3</link>
            <description>Skin covers our bodies, so it's very easy for this delicate organ to get irritated. In this episode, Marshall explains why our bodies respond to irritants with an itching sensation -- and why we're programmed to scratch.</description>
            <pubDate>Wed, 13 Oct 2010 16:11:33 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-13-brainstuff-itching.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-13-brainstuff-itching.mp3' length='2006349' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, why skin itches, itching, dermis, pruritus</itunes:keywords>
            <itunes:duration>00:03:16</itunes:duration>
            <itunes:subtitle>Skin covers our bodies, so it's very easy for this delicate organ to get irritated. In this episode, Marshall explains why our bodies respond to irritants with an itching sensation -- and why we're programmed to scratch.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is it possible to carbonate your own water?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-11-brainstuff-carbonated-water.mp3</link>
            <description>If you enjoy drinking carbonated water, this episode's for you! Listen in as Marshall Brain explains how to make your own carbonated water at home for a fraction of the price you pay in stores.</description>
            <pubDate>Mon, 11 Oct 2010 11:50:02 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-11-brainstuff-carbonated-water.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-11-brainstuff-carbonated-water.mp3' length='3997309' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, carbonated water, carbonating your own water</itunes:keywords>
            <itunes:duration>00:06:35</itunes:duration>
            <itunes:subtitle>If you enjoy drinking carbonated water, this episode's for you! Listen in as Marshall Brain explains how to make your own carbonated water at home for a fraction of the price you pay in stores.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is the difference between a hardwood and a softwood?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-08-brainstuff-hardwood-vs-softwood.mp3</link>
            <description>When it comes to differentiating between hardwoods and softwoods, it's not a matter of hardness or density -- it's all about plant reproduction. Marshall explains what angiosperms and gymnosperms are in this episode.</description>
            <pubDate>Fri, 08 Oct 2010 16:21:09 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-08-brainstuff-hardwood-vs-softwood.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-08-brainstuff-hardwood-vs-softwood.mp3' length='1633228' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, hardwood vs softwood, angiosperms, gymnosperms, plant reproduction</itunes:keywords>
            <itunes:duration>00:02:39</itunes:duration>
            <itunes:subtitle>When it comes to differentiating between hardwoods and softwoods, it's not a matter of hardness or density -- it's all about plant reproduction. Marshall explains what angiosperms and gymnosperms are in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is making my backyard sparkle at night?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-06-brainstuff-backyard-sparkle-spiders.mp3</link>
            <description>One night, Marshall went outside with a headlight lamp on his head and discovered that his backyard was full of sparkling reflections. What were these sparkles? Discover the surprising answer in this episode.</description>
            <pubDate>Wed, 06 Oct 2010 11:30:08 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-06-brainstuff-backyard-sparkle-spiders.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-06-brainstuff-backyard-sparkle-spiders.mp3' length='2257032' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, headlighting for spiders, wolf spiders, sparkles, backyard</itunes:keywords>
            <itunes:duration>00:03:41</itunes:duration>
            <itunes:subtitle>One night, Marshall went outside with a headlight lamp on his head and discovered that his backyard was full of sparkling reflections. What were these sparkles? Discover the surprising answer in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does CCC, the new form of CPR, work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-04-brainstuff-ccc.mp3</link>
            <description>Continuous chest compression is an updated form of CPR that's much easier to administer -- and, studies suggest, more effective. In this episode, Marshall Brain explains how CCC works.</description>
            <pubDate>Mon, 04 Oct 2010 11:56:37 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-04-brainstuff-ccc.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-04-brainstuff-ccc.mp3' length='1683255' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, CCC, CPR, continuous chest compression, new CPR</itunes:keywords>
            <itunes:duration>00:02:44</itunes:duration>
            <itunes:subtitle>Continuous chest compression is an updated form of CPR that's much easier to administer -- and, studies suggest, more effective. In this episode, Marshall Brain explains how CCC works.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a speedometer in an airplane work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-01-brainstuff-air-speed.mp3</link>
            <description>Most people are familiar with speedometers in cars, but do you know how air speed is determined? In this episode, Marshall explains how devices called pitot tubes gauge the speed of moving aircraft.</description>
            <pubDate>Fri, 01 Oct 2010 10:01:28 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-01-brainstuff-air-speed.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-10-01-brainstuff-air-speed.mp3' length='2439720' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, airplane speedometer, pitot tube</itunes:keywords>
            <itunes:duration>00:03:59</itunes:duration>
            <itunes:subtitle>Most people are familiar with speedometers in cars, but do you know how air speed is determined? In this episode, Marshall explains how devices called pitot tubes gauge the speed of moving aircraft.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do plastics work? What is actually in a plastic?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-29-brainstuff-plastics.mp3</link>
            <description>Plastics have become so ubiquitous that we often take them for granted, but have you ever wondered where these popular materials come from? In this episode, Marshall explains what plastics are made of.</description>
            <pubDate>Wed, 29 Sep 2010 12:35:29 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-29-brainstuff-plastics.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-29-brainstuff-plastics.mp3' length='3328406' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, plastics, PVC, PET plastic, polyethylene</itunes:keywords>
            <itunes:duration>00:05:28</itunes:duration>
            <itunes:subtitle>Plastics have become so ubiquitous that we often take them for granted, but have you ever wondered where these popular materials come from? In this episode, Marshall explains what plastics are made of.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How are movies stored on DVD discs?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-27-brainstuff-dvd.mp3</link>
            <description>How can you store an entire movie on one little DVD disc? It's all about compression! In this episode, Marshall explains the technical details and standards of video compression.</description>
            <pubDate>Mon, 27 Sep 2010 11:26:55 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-27-brainstuff-dvd.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-27-brainstuff-dvd.mp3' length='2626107' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, DVD, movie storage, video compression, MPEG</itunes:keywords>
            <itunes:duration>00:04:18</itunes:duration>
            <itunes:subtitle>How can you store an entire movie on one little DVD disc? It's all about compression! In this episode, Marshall explains the technical details and standards of video compression.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a Nor'easter?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-24-brainstuff-noreaster.mp3</link>
            <description>Nor'easters are storm systems that frequently occur in the  eastern United States during winter. In this episode, Marshall explains where Nor'easters get their name, how they work and why some Nor'easters are more powerful than others.</description>
            <pubDate>Fri, 24 Sep 2010 16:00:29 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-24-brainstuff-noreaster.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-24-brainstuff-noreaster.mp3' length='1905388' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, Nor'easter, gulf stream, low pressure system, weather</itunes:keywords>
            <itunes:duration>00:03:06</itunes:duration>
            <itunes:subtitle>Nor'easters are storm systems that frequently occur in the  eastern United States during winter. In this episode, Marshall explains where Nor'easters get their name, how they work and why some Nor'easters are more powerful than others.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Are all blood types needed for donation?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-22-brainstuff-blood-types.mp3</link>
            <description>In this episode, Marshall explains how proteins determine your blood type -- and why blood types must match for blood transfusions to be successful.</description>
            <pubDate>Wed, 22 Sep 2010 13:44:11 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-22-brainstuff-blood-types.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-22-brainstuff-blood-types.mp3' length='2868784' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, blood types, blood donation, Rh factor, transfusion</itunes:keywords>
            <itunes:duration>00:04:42</itunes:duration>
            <itunes:subtitle>In this episode, Marshall explains how proteins determine your blood type -- and why blood types must match for blood transfusions to be successful.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why don't they use normal air in race car tires?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-20-brainstuff-tire-nitrogen.mp3</link>
            <description>Race car tires are often filled with nitrogen because nitrogen pressure is more consistent than air pressure. In this episode, Marshall explains why nitrogen is better for race cars -- but not for regular vehicles.</description>
            <pubDate>Mon, 20 Sep 2010 14:04:29 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-20-brainstuff-tire-nitrogen.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-20-brainstuff-tire-nitrogen.mp3' length='1579380' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, race car tires, nitrogen pressure, expansion, contraction</itunes:keywords>
            <itunes:duration>00:02:33</itunes:duration>
            <itunes:subtitle>Race car tires are often filled with nitrogen because nitrogen pressure is more consistent than air pressure. In this episode, Marshall explains why nitrogen is better for race cars -- but not for regular vehicles.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can a car get 100 MPG?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-17-brainstuff-car-get-100-mpg.mp3</link>
            <description>Created in the 1980s, the Avion is a car that can get more than 100 miles per gallon. In this episode, Marshall Brain talks about the factors that make the Avion so efficient -- and how the same techniques could be applied to production vehicles.</description>
            <pubDate>Fri, 17 Sep 2010 12:01:56 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-17-brainstuff-car-get-100-mpg.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-17-brainstuff-car-get-100-mpg.mp3' length='2981633' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, car that gets 100 mpg, the Avion</itunes:keywords>
            <itunes:duration>00:04:53</itunes:duration>
            <itunes:subtitle>Created in the 1980s, the Avion is a car that can get more than 100 miles per gallon. In this episode, Marshall Brain talks about the factors that make the Avion so efficient -- and how the same techniques could be applied to production vehicles.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do cats have whiskers?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-15-brainstuff-cat-whiskers.mp3</link>
            <description>Cat whiskers, also known as &quot;tactile hairs,&quot; are very different from a cat's regular body hair. In this episode, Marshall explains how these hairs are unique and what cats use them for.</description>
            <pubDate>Wed, 15 Sep 2010 13:53:59 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-15-brainstuff-cat-whiskers.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-15-brainstuff-cat-whiskers.mp3' length='1965116' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, why do cats have whiskers, tactile hairs</itunes:keywords>
            <itunes:duration>00:03:12</itunes:duration>
            <itunes:subtitle>Cat whiskers, also known as &quot;tactile hairs,&quot; are very different from a cat's regular body hair. In this episode, Marshall explains how these hairs are unique and what cats use them for.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do retractable roofs in convertible stadiums work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-13-brainstuff-retractable-roof-stadiums.mp3</link>
            <description>Retractable roofs are the latest trend in sports stadium design. Marshall highlights multiple examples of convertible stadiums in the United States and explains how they work in this episode.</description>
            <pubDate>Mon, 13 Sep 2010 10:57:57 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-13-brainstuff-retractable-roof-stadiums.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-13-brainstuff-retractable-roof-stadiums.mp3' length='3617100' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, retractable roofs, convertible stadiums, sports stadiums</itunes:keywords>
            <itunes:duration>00:05:57</itunes:duration>
            <itunes:subtitle>Retractable roofs are the latest trend in sports stadium design. Marshall highlights multiple examples of convertible stadiums in the United States and explains how they work in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does large-scale power storage work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-10-brainstuff-power-storage.mp3</link>
            <description>Wind farms and solar power plants are promising sources of renewable energy, but they're not as reliable as conventional power sources. In this episode, Marshall explains how large-scale storage technologies could make solar and wind power more viable.</description>
            <pubDate>Fri, 10 Sep 2010 13:56:26 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-10-brainstuff-power-storage.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-10-brainstuff-power-storage.mp3' length='3216381' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, large-scale power storage, solar energy, wind energy</itunes:keywords>
            <itunes:duration>00:05:17</itunes:duration>
            <itunes:subtitle>Wind farms and solar power plants are promising sources of renewable energy, but they're not as reliable as conventional power sources. In this episode, Marshall explains how large-scale storage technologies could make solar and wind power more viable.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is Low-E glass?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-08-brainstuff-low-e-windows.mp3</link>
            <description>Low-emissivity (Low-E) glass is a special, expensive type that blocks out ultraviolet and infrared light. This coated glass can help protect your furniture and improve the energy efficiency of your home, as Marshall Brain explains in this episode.</description>
            <pubDate>Wed, 08 Sep 2010 12:09:49 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-08-brainstuff-low-e-windows.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-08-brainstuff-low-e-windows.mp3' length='3692855' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, low-e glass, low emissivity glass, windows, insulation</itunes:keywords>
            <itunes:duration>00:06:04</itunes:duration>
            <itunes:subtitle>Low-emissivity (Low-E) glass is a special, expensive type that blocks out ultraviolet and infrared light. This coated glass can help protect your furniture and improve the energy efficiency of your home, as Marshall Brain explains in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do big city shell and three-card monte games work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-06-brainstuff-3-card-monte.mp3</link>
            <description>Shell games and three-card monte games are common sights in big cities, but did you know they're scams? Marshall explains the similar principles and tricks behind these &quot;games&quot; -- and why you can't win them -- in this episode.</description>
            <pubDate>Mon, 06 Sep 2010 12:09:58 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-06-brainstuff-3-card-monte.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-06-brainstuff-3-card-monte.mp3' length='2722808' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, big city, shell games, three-card monte, scams</itunes:keywords>
            <itunes:duration>00:05:34</itunes:duration>
            <itunes:subtitle>Shell games and three-card monte games are common sights in big cities, but did you know they're scams? Marshall explains the similar principles and tricks behind these &quot;games&quot; -- and why you can't win them -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is organic food more expensive than regular food?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-03-brainstuff-organic-food-prices.mp3</link>
            <description>You've probably noticed that organic foods cost significantly more than non-organic ones, but have you ever wondered why? In this episode, Marshall Brain explains how higher production costs and other factors lead to higher prices in the grocery store.</description>
            <pubDate>Fri, 03 Sep 2010 14:53:26 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-03-brainstuff-organic-food-prices.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-03-brainstuff-organic-food-prices.mp3' length='2657295' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, organic food prices, organic food more expensive</itunes:keywords>
            <itunes:duration>00:05:26</itunes:duration>
            <itunes:subtitle>You've probably noticed that organic foods cost significantly more than non-organic ones, but have you ever wondered why? In this episode, Marshall Brain explains how higher production costs and other factors lead to higher prices in the grocery store.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What makes NASCAR engines different from other engines?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-01-brainstuff-nascar-engines.mp3</link>
            <description>NASCAR engines are built for maximum efficiency, and they're much more powerful than regular engines. Marshall Brain discusses five ways in which NASCAR engines differ from regular ones in this episode.</description>
            <pubDate>Wed, 01 Sep 2010 12:33:39 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-01-brainstuff-nascar-engines.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-09-01-brainstuff-nascar-engines.mp3' length='3016022' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, NASCAR engines, NASCAR, car engines, horsepower, displacement</itunes:keywords>
            <itunes:duration>00:04:57</itunes:duration>
            <itunes:subtitle>NASCAR engines are built for maximum efficiency, and they're much more powerful than regular engines. Marshall Brain discusses five ways in which NASCAR engines differ from regular ones in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do some doors open inward and some open outward?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-30-brainstuff-door-opening-direction.mp3</link>
            <description>In personal residences, doors typically open inward; in public buildings, however, doors open outward. Why the difference? It's all about safety and security, as Marshall explains in this episode.</description>
            <pubDate>Mon, 30 Aug 2010 12:33:21 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-30-brainstuff-door-opening-direction.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-30-brainstuff-door-opening-direction.mp3' length='2027287' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, doors, inward opening doors, outward opening doors</itunes:keywords>
            <itunes:duration>00:03:18</itunes:duration>
            <itunes:subtitle>In personal residences, doors typically open inward; in public buildings, however, doors open outward. Why the difference? It's all about safety and security, as Marshall explains in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is bamboo suddenly appearing in so many products?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-27-brainstuff-bamboo.mp3</link>
            <description>These days, bamboo is used to make all sorts of products, from flooring and furniture to bicycle frames. In this episode, Marshall explains why bamboo is becoming so popular -- and the advantages of using it to create consumer goods.</description>
            <pubDate>Fri, 27 Aug 2010 13:13:24 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-27-brainstuff-bamboo.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-27-brainstuff-bamboo.mp3' length='2968740' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, bamboo, bamboo products, bamboo flooring, bamboo furniture</itunes:keywords>
            <itunes:duration>00:04:52</itunes:duration>
            <itunes:subtitle>These days, bamboo is used to make all sorts of products, from flooring and furniture to bicycle frames. In this episode, Marshall explains why bamboo is becoming so popular -- and the advantages of using it to create consumer goods.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is a cell phone called a cell phone?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-25-brainstuff-cell-phone.mp3</link>
            <description>Cellular phone systems divide areas of coverage into &quot;cells,&quot; hence the name. Marshall Brain details how these systems work in this episode.</description>
            <pubDate>Wed, 25 Aug 2010 15:02:54 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-25-brainstuff-cell-phone.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-25-brainstuff-cell-phone.mp3' length='2439761' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, cell phones, mobile telephone switching office</itunes:keywords>
            <itunes:duration>00:03:59</itunes:duration>
            <itunes:subtitle>Cellular phone systems divide areas of coverage into &quot;cells,&quot; hence the name. Marshall Brain details how these systems work in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do they backlight LCD screens?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-23-brainstuff-lcd-backlight.mp3</link>
            <description>In this episode, Marshall explains the two technologies that are used to backlight LCD panels.</description>
            <pubDate>Mon, 23 Aug 2010 15:44:58 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-23-brainstuff-lcd-backlight.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-23-brainstuff-lcd-backlight.mp3' length='2603287' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, LCD backlights, fluorescent lamps, ccfls, LED technology</itunes:keywords>
            <itunes:duration>00:04:16</itunes:duration>
            <itunes:subtitle>In this episode, Marshall explains the two technologies that are used to backlight LCD panels.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do polymer crystals work, and why do they absorb so much water?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-20-brainstuff-polymer-crystals.mp3</link>
            <description>Polymer crystals are extremely absorbent, and that's why you'll often find them in disposable diapers. Marshall explains how polymer crystals are able to absorb large quantities of liquids -- and keep you cool and dry -- in this episode.</description>
            <pubDate>Fri, 20 Aug 2010 13:12:11 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-20-brainstuff-polymer-crystals.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-20-brainstuff-polymer-crystals.mp3' length='1554732' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, polymer crystals, diapers, superabsorbent polymers, evaporative cooling</itunes:keywords>
            <itunes:duration>00:02:31</itunes:duration>
            <itunes:subtitle>Polymer crystals are extremely absorbent, and that's why you'll often find them in disposable diapers. Marshall explains how polymer crystals are able to absorb large quantities of liquids -- and keep you cool and dry -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a vactrain?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-18-brainstuff-vactrain.mp3</link>
            <description>Vactrains may be the next big thing in the evolution of high-speed transportation. In this episode, Marshall explains how vactrain systems will work, how close they are to becoming reality and the potential they have to impact global transportation.</description>
            <pubDate>Wed, 18 Aug 2010 15:06:50 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-18-brainstuff-vactrain.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-18-brainstuff-vactrain.mp3' length='3146373' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, vactrains, evacuated tube transport, transportation, high-speed trains</itunes:keywords>
            <itunes:duration>00:05:10</itunes:duration>
            <itunes:subtitle>Vactrains may be the next big thing in the evolution of high-speed transportation. In this episode, Marshall explains how vactrain systems will work, how close they are to becoming reality and the potential they have to impact global transportation.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does asphalt work, and where does it come from?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-16-brainstuff-asphalt.mp3</link>
            <description>Asphalt is an extremely common, oil-derived material that's used to pave a majority of roads in the United States. Tune in to learn more about asphalt.</description>
            <pubDate>Mon, 16 Aug 2010 13:31:32 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-16-brainstuff-asphalt.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-16-brainstuff-asphalt.mp3' length='3040641' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, asphalt, paving roads, crude oil, recycling asphalt</itunes:keywords>
            <itunes:duration>00:04:59</itunes:duration>
            <itunes:subtitle>Asphalt is an extremely common, oil-derived material that's used to pave a majority of roads in the United States. Tune in to learn more about asphalt.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>To maximize happiness, what should you spend money on?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-13-brainstuff-buying-happiness.mp3</link>
            <description>They say that money can't buy happiness, but it can definitely contribute to your well-being. So what exactly should you spend your money on to maximize your happiness? Stuff? Experiences? Marshall Brain investigates in this episode.</description>
            <pubDate>Fri, 13 Aug 2010 15:45:51 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-13-brainstuff-buying-happiness.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-13-brainstuff-buying-happiness.mp3' length='2890176' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, happiness, spending money, money and happiness</itunes:keywords>
            <itunes:duration>00:04:44</itunes:duration>
            <itunes:subtitle>They say that money can't buy happiness, but it can definitely contribute to your well-being. So what exactly should you spend your money on to maximize your happiness? Stuff? Experiences? Marshall Brain investigates in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Where did the potato chip come from?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-11-brainstuff-potato-chips.mp3</link>
            <description>Potato chips were invented in 1853 by an American cook named George Crum, and they've been a popular food item ever since. Learn more about George Crum and the evolution of the potato chip in this episode of BrainStuff.</description>
            <pubDate>Wed, 11 Aug 2010 14:11:00 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-11-brainstuff-potato-chips.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-11-brainstuff-potato-chips.mp3' length='2350225' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, george crum, potato chips, Saratoga chips</itunes:keywords>
            <itunes:duration>00:03:50</itunes:duration>
            <itunes:subtitle>Potato chips were invented in 1853 by an American cook named George Crum, and they've been a popular food item ever since. Learn more about George Crum and the evolution of the potato chip in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do smoke detectors intercommunicate?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-09-brainstuff-fire-alarm-intercommunicate.mp3</link>
            <description>Some AC-powered smoke detectors are wired to communicate with each other. So when one unit is triggered, all of the units go off. Find out how this intercommunication works in this episode.</description>
            <pubDate>Mon, 09 Aug 2010 15:20:21 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-09-brainstuff-fire-alarm-intercommunicate.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-09-brainstuff-fire-alarm-intercommunicate.mp3' length='1330666' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, smoke detectors intercommunicate, marshall, AC-powered smoke detectors</itunes:keywords>
            <itunes:duration>00:02:08</itunes:duration>
            <itunes:subtitle>Some AC-powered smoke detectors are wired to communicate with each other. So when one unit is triggered, all of the units go off. Find out how this intercommunication works in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can I recover a deleted file from my computer?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-06-brainstuff-delete-file.mp3</link>
            <description>In many cases, it's possible to recover files that have been deleted by using your computer's Recycle Bin. Marshall Brain reveals ways to recover deleted files -- and how to erase them permanently -- in this episode.</description>
            <pubDate>Fri, 06 Aug 2010 14:35:49 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-06-brainstuff-delete-file.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-06-brainstuff-delete-file.mp3' length='2197147' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, recovering deleted files, hard drive utilities</itunes:keywords>
            <itunes:duration>00:03:35</itunes:duration>
            <itunes:subtitle>In many cases, it's possible to recover files that have been deleted by using your computer's Recycle Bin. Marshall Brain reveals ways to recover deleted files -- and how to erase them permanently -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is Windows Safe Mode?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-04-brainstuff-windows-safe-mode.mp3</link>
            <description>Safe Mode is a feature of the Windows operating system that allows users to load a limited version of the system in order to troubleshoot problems. Learn more about using Safe Mode in this episode.</description>
            <pubDate>Wed, 04 Aug 2010 13:36:14 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-04-brainstuff-windows-safe-mode.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-04-brainstuff-windows-safe-mode.mp3' length='2550845' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, Windows, safe mode, Windows operating systems</itunes:keywords>
            <itunes:duration>00:04:10</itunes:duration>
            <itunes:subtitle>Safe Mode is a feature of the Windows operating system that allows users to load a limited version of the system in order to troubleshoot problems. Learn more about using Safe Mode in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What makes us yawn?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-02-brainstuff-yawn.mp3</link>
            <description>Yawning is a universal human behavior, yet scientists still don't know exactly why we do it or what purpose it serves. Marshall Brain explores some of the theories behind yawning in this episode.</description>
            <pubDate>Mon, 02 Aug 2010 11:42:22 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-02-brainstuff-yawn.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-08-02-brainstuff-yawn.mp3' length='2502780' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, why do we yawn, yawning</itunes:keywords>
            <itunes:duration>00:04:05</itunes:duration>
            <itunes:subtitle>Yawning is a universal human behavior, yet scientists still don't know exactly why we do it or what purpose it serves. Marshall Brain explores some of the theories behind yawning in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a digital signature?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-30-brainstuff-digital-signature.mp3</link>
            <description>A digital signature is a way to authenticate electronic documents. Find out what 'authentic' means in this context -- and how encryption is involved in the authentication process -- in this episode.</description>
            <pubDate>Fri, 30 Jul 2010 13:18:42 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-30-brainstuff-digital-signature.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-30-brainstuff-digital-signature.mp3' length='3139645' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, digital signature, authentication, encryption, checksum, digital certificates</itunes:keywords>
            <itunes:duration>00:05:09</itunes:duration>
            <itunes:subtitle>A digital signature is a way to authenticate electronic documents. Find out what 'authentic' means in this context -- and how encryption is involved in the authentication process -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Will a really big earthquake sink Western California?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-28-brainstuff-fault-lines.mp3</link>
            <description>Given California's history of earthquakes and major fault lines, it's not surprising that people speculate about parts of California breaking off into the ocean. Fortunately, seismic forces don't work that way, as Marshall Brain explains in this episode.</description>
            <pubDate>Wed, 28 Jul 2010 12:06:15 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-28-brainstuff-fault-lines.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-28-brainstuff-fault-lines.mp3' length='3894584' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, will an earthquake sink california, fault lines</itunes:keywords>
            <itunes:duration>00:06:25</itunes:duration>
            <itunes:subtitle>Given California's history of earthquakes and major fault lines, it's not surprising that people speculate about parts of California breaking off into the ocean. Fortunately, seismic forces don't work that way, as Marshall Brain explains in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What are electrolytes?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-26-brainstuff-electrolytes.mp3</link>
            <description>What are electrolytes, and why do athletes and sick kids need them? Marshall Brain explains how ions and electrolytes work in your body in this episode.</description>
            <pubDate>Mon, 26 Jul 2010 12:58:15 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-26-brainstuff-electrolytes.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-26-brainstuff-electrolytes.mp3' length='1713882' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, electrolytes, sports drinks, ions, bodily fluids</itunes:keywords>
            <itunes:duration>00:02:47</itunes:duration>
            <itunes:subtitle>What are electrolytes, and why do athletes and sick kids need them? Marshall Brain explains how ions and electrolytes work in your body in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why can biting on aluminum foil be painful?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-23-brainstuff-aluminum-foil-teeth.mp3</link>
            <description>When (dental) metal in your mouth comes in contact with aluminum foil, your teeth get a painful shock from the electricity produced. Marshall Brain explains how the voltaic effect plays out in your mouth in this episode.</description>
            <pubDate>Fri, 23 Jul 2010 14:09:13 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-23-brainstuff-aluminum-foil-teeth.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-23-brainstuff-aluminum-foil-teeth.mp3' length='1538600' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, biting aluminum foil, painful, voltaic effect, voltage</itunes:keywords>
            <itunes:duration>00:02:29</itunes:duration>
            <itunes:subtitle>When (dental) metal in your mouth comes in contact with aluminum foil, your teeth get a painful shock from the electricity produced. Marshall Brain explains how the voltaic effect plays out in your mouth in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What exactly is jello made from?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-21-brainstuff-jello.mp3</link>
            <description>Jello is tasty, colorful and fun to eat, but what's in it? One of its ingredients, gelatin, comes from animals. Marshall Brain breaks down the chemistry of jello and gelatin in this episode.</description>
            <pubDate>Wed, 21 Jul 2010 14:33:58 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-21-brainstuff-jello.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-21-brainstuff-jello.mp3' length='3027255' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, jello, gelatin, collagen, collagen proteins, polypeptide chains</itunes:keywords>
            <itunes:duration>00:04:58</itunes:duration>
            <itunes:subtitle>Jello is tasty, colorful and fun to eat, but what's in it? One of its ingredients, gelatin, comes from animals. Marshall Brain breaks down the chemistry of jello and gelatin in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What does it mean when a car has dual overhead cams?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-19-brainstuff-dohc.mp3</link>
            <description>A camshaft plays an integral role in the functioning of an engine. And dual overhead cams ramp up a machine's performance even more. Find out how dual overhead camshafts work in this episode.</description>
            <pubDate>Mon, 19 Jul 2010 13:37:28 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-19-brainstuff-dohc.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-19-brainstuff-dohc.mp3' length='1972233' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, dual overhead cams, camshafts, cylinders, valves, dohc</itunes:keywords>
            <itunes:duration>00:03:12</itunes:duration>
            <itunes:subtitle>A camshaft plays an integral role in the functioning of an engine. And dual overhead cams ramp up a machine's performance even more. Find out how dual overhead camshafts work in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do self-cleaning ovens work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-16-brainstuff-self-cleaning-oven.mp3</link>
            <description>What does it take for an oven to clean itself? A whole lot of heat! Marshall Brain explains how these special ovens use intense temperatures to burn off baking spills and debris in this episode.</description>
            <pubDate>Fri, 16 Jul 2010 15:59:04 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-16-brainstuff-self-cleaning-oven.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-16-brainstuff-self-cleaning-oven.mp3' length='1559237' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, self-cleaning ovens, ovens, baking</itunes:keywords>
            <itunes:duration>00:02:31</itunes:duration>
            <itunes:subtitle>What does it take for an oven to clean itself? A whole lot of heat! Marshall Brain explains how these special ovens use intense temperatures to burn off baking spills and debris in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why can you hear the ocean in a seashell?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-14-brainstuff-seashell-sound.mp3</link>
            <description>There are various theories about why you can hear ocean-like sounds when you hold a seashell up to your ear. Marshall Brain explains what you're probably hearing in that seashell -- and why you don't need a shell to hear it -- in this episode.</description>
            <pubDate>Wed, 14 Jul 2010 11:45:26 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-14-brainstuff-seashell-sound.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-14-brainstuff-seashell-sound.mp3' length='1783106' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, hear the ocean in a seashell, seashell</itunes:keywords>
            <itunes:duration>00:02:54</itunes:duration>
            <itunes:subtitle>There are various theories about why you can hear ocean-like sounds when you hold a seashell up to your ear. Marshall Brain explains what you're probably hearing in that seashell -- and why you don't need a shell to hear it -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do flies breathe?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-12-brainstuff-fly-respiration.mp3</link>
            <description>Insects like flies have a very different respiratory system than we do. Learn more about how flies and insects breathe in this episode.</description>
            <pubDate>Mon, 12 Jul 2010 15:17:54 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-12-brainstuff-fly-respiration.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-12-brainstuff-fly-respiration.mp3' length='1533115' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, fly respiration, insect respiration, how flies breathe</itunes:keywords>
            <itunes:duration>00:02:29</itunes:duration>
            <itunes:subtitle>Insects like flies have a very different respiratory system than we do. Learn more about how flies and insects breathe in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can water cut through steel?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-09-brainstuff-waterjet.mp3</link>
            <description>Waterjets are  tools that use highly pressurized, focused streams of water to cut through metal and other solid materials. Learn more about waterjets in this episode.</description>
            <pubDate>Fri, 09 Jul 2010 11:54:18 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-09-brainstuff-waterjet.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-09-brainstuff-waterjet.mp3' length='2097621' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, waterjet, cutting steel with water</itunes:keywords>
            <itunes:duration>00:03:25</itunes:duration>
            <itunes:subtitle>Waterjets are  tools that use highly pressurized, focused streams of water to cut through metal and other solid materials. Learn more about waterjets in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What makes your arms, legs and feet fall asleep?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-07-brainstuff-falling-asleep.mp3</link>
            <description>When you put prolonged pressure on your feet, arms or legs, you temporarily cut off or scramble communications between your brain and your body parts. Marshall explains exactly what happens when body parts &quot;fall sleep&quot; in this episode.</description>
            <pubDate>Wed, 07 Jul 2010 14:06:22 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-07-brainstuff-falling-asleep.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-07-brainstuff-falling-asleep.mp3' length='2191400' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, sleeping body parts, nerve fibers, brainstuff</itunes:keywords>
            <itunes:duration>00:03:34</itunes:duration>
            <itunes:subtitle>When you put prolonged pressure on your feet, arms or legs, you temporarily cut off or scramble communications between your brain and your body parts. Marshall explains exactly what happens when body parts &quot;fall sleep&quot; in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Where does cork come from?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-05-brainstuff-cork.mp3</link>
            <description>Most cork comes from special trees that grow in places near the Mediterranean Sea. Learn more about cork oak trees, cork properties, cork products and cork processing in this episode.</description>
            <pubDate>Mon, 05 Jul 2010 17:25:42 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-05-brainstuff-cork.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-05-brainstuff-cork.mp3' length='2116168' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, cork, cork oak, cork bottle stoppers</itunes:keywords>
            <itunes:duration>00:03:27</itunes:duration>
            <itunes:subtitle>Most cork comes from special trees that grow in places near the Mediterranean Sea. Learn more about cork oak trees, cork properties, cork products and cork processing in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What happens when pregnant women smoke cigarettes?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-02-brainstuff-baby-nicotine.mp3</link>
            <description>When pregnant women smoke, they expose their developing babies to a host of addictive, harmful chemicals. In this episode, Marshall Brain explains how nicotine and other compounds found in cigarettes affect developing fetuses.</description>
            <pubDate>Fri, 02 Jul 2010 10:56:25 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-02-brainstuff-baby-nicotine.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-07-02-brainstuff-baby-nicotine.mp3' length='2164755' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, pregnant, cigarettes, nicotine babies, smoking during pregnancy</itunes:keywords>
            <itunes:duration>00:03:32</itunes:duration>
            <itunes:subtitle>When pregnant women smoke, they expose their developing babies to a host of addictive, harmful chemicals. In this episode, Marshall Brain explains how nicotine and other compounds found in cigarettes affect developing fetuses.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is an IP address?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-30-brainstuff-ip-addresses.mp3</link>
            <description>Every computer that's connected to the Internet has its own unique &quot;address.&quot; Tune in as Marshall explains how IP addresses work -- and how many of them exist -- in this episode.</description>
            <pubDate>Wed, 30 Jun 2010 13:20:44 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-30-brainstuff-ip-addresses.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-30-brainstuff-ip-addresses.mp3' length='1929915' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, ip address, octet, internet protocol, Pv6, binary</itunes:keywords>
            <itunes:duration>00:03:08</itunes:duration>
            <itunes:subtitle>Every computer that's connected to the Internet has its own unique &quot;address.&quot; Tune in as Marshall explains how IP addresses work -- and how many of them exist -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is cotton more absorbent than nylon?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-28-brainstuff-cotton-nylon.mp3</link>
            <description>When water comes in contact with the complex molecules that make up cotton and nylon, it causes a different action in each material -- but why? Listen in as Marshall Brain breaks down the science behind water absorption in this podcast.</description>
            <pubDate>Mon, 28 Jun 2010 11:45:38 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-28-brainstuff-cotton-nylon.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-28-brainstuff-cotton-nylon.mp3' length='2110682' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, cotton, nylon, water absorption</itunes:keywords>
            <itunes:duration>00:03:27</itunes:duration>
            <itunes:subtitle>When water comes in contact with the complex molecules that make up cotton and nylon, it causes a different action in each material -- but why? Listen in as Marshall Brain breaks down the science behind water absorption in this podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does disk defragmentation work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-25-brainstuff-disk-defrag.mp3</link>
            <description>The term 'disk defrag' usually refers to the Windows utility known as the disk defragmenter. But what exactly is this thing, and how does it work? Tune in as Marshall Brain explains disk defragmentation in this podcast.</description>
            <pubDate>Fri, 25 Jun 2010 12:45:07 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-25-brainstuff-disk-defrag.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-25-brainstuff-disk-defrag.mp3' length='2311564' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, brainstuff, disk defragment</itunes:keywords>
            <itunes:duration>00:03:46</itunes:duration>
            <itunes:subtitle>The term 'disk defrag' usually refers to the Windows utility known as the disk defragmenter. But what exactly is this thing, and how does it work? Tune in as Marshall Brain explains disk defragmentation in this podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Can nasal sprays be addictive?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-23-brainstuff-nasal-sprays.mp3</link>
            <description>Some people have become so dependent on their nasal sprays and products that they might worry they're addicted. Marshall Brain explains why you can't really be addicted to nasal products in this episode.</description>
            <pubDate>Wed, 23 Jun 2010 13:56:10 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-23-brainstuff-nasal-sprays.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-23-brainstuff-nasal-sprays.mp3' length='2353621' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, nasal sprays addictive, nasal sprays, rebound congestion</itunes:keywords>
            <itunes:duration>00:03:51</itunes:duration>
            <itunes:subtitle>Some people have become so dependent on their nasal sprays and products that they might worry they're addicted. Marshall Brain explains why you can't really be addicted to nasal products in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do astronauts function in their spacesuits?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-21-brainstuff-spacesuit-eating.mp3</link>
            <description>Astronauts wear special suits while they're working in space, and these spacewalks can last for hours. In this episode, Marshall Brain explains how astronauts take care of their basic needs while wearing spacesuits.</description>
            <pubDate>Mon, 21 Jun 2010 13:00:02 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-21-brainstuff-spacesuit-eating.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-21-brainstuff-spacesuit-eating.mp3' length='1508821' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall, EMU, spacesuit functions, astronauts, MAG, IDB</itunes:keywords>
            <itunes:duration>00:02:26</itunes:duration>
            <itunes:subtitle>Astronauts wear special suits while they're working in space, and these spacewalks can last for hours. In this episode, Marshall Brain explains how astronauts take care of their basic needs while wearing spacesuits.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is there a way to compare a human being to an engine?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-18-brainstuff-human-efficiency.mp3</link>
            <description>Human muscles are essentially biological engines. In terms of efficiency, biological engines are amazing. Listen in as Marshall Brain calculates human efficiency in this episode.</description>
            <pubDate>Fri, 18 Jun 2010 16:08:33 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-18-brainstuff-human-efficiency.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-18-brainstuff-human-efficiency.mp3' length='1618274' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, human efficiency, biological engine</itunes:keywords>
            <itunes:duration>00:02:38</itunes:duration>
            <itunes:subtitle>Human muscles are essentially biological engines. In terms of efficiency, biological engines are amazing. Listen in as Marshall Brain calculates human efficiency in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do people pull large objects with their teeth?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-16-brainstuff-teeth-pull.mp3</link>
            <description>Marshall Brain explains the physics behind pulling large objects with your teeth in this episode.</description>
            <pubDate>Wed, 16 Jun 2010 15:26:44 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-16-brainstuff-teeth-pull.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-16-brainstuff-teeth-pull.mp3' length='2591335' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, pulling large objects with teeth</itunes:keywords>
            <itunes:duration>00:04:14</itunes:duration>
            <itunes:subtitle>Marshall Brain explains the physics behind pulling large objects with your teeth in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why does a manual transmission make a whirring noise?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-14-brainstuff-manual-transmission-whir.mp3</link>
            <description>When manual transmissions are put in reverse, they produce a loud, whirring noise. What's the culprit? Gears. Marshall Brain explains how helical and spur gears work in manual transmissions in this episode.</description>
            <pubDate>Mon, 14 Jun 2010 16:05:20 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-14-brainstuff-manual-transmission-whir.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-14-brainstuff-manual-transmission-whir.mp3' length='1655890' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, manual transmission whir, helical gear, spur gear</itunes:keywords>
            <itunes:duration>00:02:41</itunes:duration>
            <itunes:subtitle>When manual transmissions are put in reverse, they produce a loud, whirring noise. What's the culprit? Gears. Marshall Brain explains how helical and spur gears work in manual transmissions in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do human beings have eyebrows?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-11-brainstuff-eyebrows.mp3</link>
            <description>Eyebrows are prominent human features, but what purpose do they serve? Scientists think they help keep stuff out of our eyes and aid in nonverbal communication, among other things. Learn more about eyebrows in this episode.</description>
            <pubDate>Fri, 11 Jun 2010 12:33:24 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-11-brainstuff-eyebrows.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-11-brainstuff-eyebrows.mp3' length='1513784' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, why do we have eyebrows</itunes:keywords>
            <itunes:duration>00:02:27</itunes:duration>
            <itunes:subtitle>Eyebrows are prominent human features, but what purpose do they serve? Scientists think they help keep stuff out of our eyes and aid in nonverbal communication, among other things. Learn more about eyebrows in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Where do salad dressings get their bizarre names?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-09-brainstuff-salad-dressing.mp3</link>
            <description>Salad dressings like Ranch and Thousand Island are traditional favorites, but have you ever wondered how they got their names? Marshall Brain reveals what salad dressings are made of -- and where their famous names came from -- in this episode.</description>
            <pubDate>Wed, 09 Jun 2010 14:50:31 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-09-brainstuff-salad-dressing.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-09-brainstuff-salad-dressing.mp3' length='5244988' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, salad dressing names, salad dressing, thousand island</itunes:keywords>
            <itunes:duration>00:04:20</itunes:duration>
            <itunes:subtitle>Salad dressings like Ranch and Thousand Island are traditional favorites, but have you ever wondered how they got their names? Marshall Brain reveals what salad dressings are made of -- and where their famous names came from -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a funicular railway?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-07-brainstuff-funicular.mp3</link>
            <description>A funicular railway combines the technology of an elevator and a train. Find out how these fascinating railways work -- and how old they are -- in this episode.</description>
            <pubDate>Mon, 07 Jun 2010 14:32:59 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-07-brainstuff-funicular.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-07-brainstuff-funicular.mp3' length='2283612' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, funicular railway, incline railway</itunes:keywords>
            <itunes:duration>00:03:44</itunes:duration>
            <itunes:subtitle>A funicular railway combines the technology of an elevator and a train. Find out how these fascinating railways work -- and how old they are -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What do the symbols on the U.S. one-dollar bill mean?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-04-brainstuff-dollar-bill.mp3</link>
            <description>If you've ever looked carefully at a U.S. one-dollar bill, you've probably noticed some mysterious symbols and Latin phrases. What do these symbols stand for? Why are they on there? Marshall Brain breaks it down for you in this episode.</description>
            <pubDate>Fri, 04 Jun 2010 16:34:55 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-04-brainstuff-dollar-bill.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-04-brainstuff-dollar-bill.mp3' length='2791369' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, symbols one-dollar bill, united states seal</itunes:keywords>
            <itunes:duration>00:04:34</itunes:duration>
            <itunes:subtitle>If you've ever looked carefully at a U.S. one-dollar bill, you've probably noticed some mysterious symbols and Latin phrases. What do these symbols stand for? Why are they on there? Marshall Brain breaks it down for you in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do feet stink?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-02-brainstuff-feet-sweat.mp3</link>
            <description>What causes stinky, smelly feet? Sweat and bacteria. Find out exactly how bacteria turn sweat into malodorous feet in this episode.</description>
            <pubDate>Wed, 02 Jun 2010 15:06:09 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-02-brainstuff-feet-sweat.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-06-02-brainstuff-feet-sweat.mp3' length='1685670' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, why do feet stink, feet sweat</itunes:keywords>
            <itunes:duration>00:02:44</itunes:duration>
            <itunes:subtitle>What causes stinky, smelly feet? Sweat and bacteria. Find out exactly how bacteria turn sweat into malodorous feet in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What does &quot;not guilty by reason of insanity&quot; mean?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-31-brainstuff-insanity-plea.mp3</link>
            <description>Claiming the &quot;insanity defense&quot; in fictional courts of law is common and seems pretty straightforward; in real life, it's much more rare and complex. Discover the legal definition of &quot;insanity&quot; -- and how it relates to mental illness -- in this episode.</description>
            <pubDate>Mon, 31 May 2010 10:35:37 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-31-brainstuff-insanity-plea.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-31-brainstuff-insanity-plea.mp3' length='3151139' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, not guilty by reason of insanity, court</itunes:keywords>
            <itunes:duration>00:05:10</itunes:duration>
            <itunes:subtitle>Claiming the &quot;insanity defense&quot; in fictional courts of law is common and seems pretty straightforward; in real life, it's much more rare and complex. Discover the legal definition of &quot;insanity&quot; -- and how it relates to mental illness -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why shouldn't you go swimming right after a meal?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-28-brainstuff-swim-eat.mp3</link>
            <description>As children, many of us have been admonished not to go swimming for at least an hour after eating. But, as it turns out, there's biology behind this commonplace advice. Tune in to this episode to find out why you shouldn't swim right after you eat.</description>
            <pubDate>Fri, 28 May 2010 14:03:18 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-28-brainstuff-swim-eat.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-28-brainstuff-swim-eat.mp3' length='2257490' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, swimming after eating, swimming cramps after eating</itunes:keywords>
            <itunes:duration>00:03:41</itunes:duration>
            <itunes:subtitle>As children, many of us have been admonished not to go swimming for at least an hour after eating. But, as it turns out, there's biology behind this commonplace advice. Tune in to this episode to find out why you shouldn't swim right after you eat.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What's the best way to get Twitter or Facebook followers?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-26-brainstuff-twitter.mp3</link>
            <description>In this episode, Marshall Brain launches the first of a series of experiments with social media. Tune in to learn more about the new BrainStuff Twitter and Facebook accounts and Marshall's social media experiments.</description>
            <pubDate>Wed, 26 May 2010 15:51:27 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-26-brainstuff-twitter.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-26-brainstuff-twitter.mp3' length='3113268' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, twitter, facebook, social media followers, social media</itunes:keywords>
            <itunes:duration>00:02:33</itunes:duration>
            <itunes:subtitle>In this episode, Marshall Brain launches the first of a series of experiments with social media. Tune in to learn more about the new BrainStuff Twitter and Facebook accounts and Marshall's social media experiments.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does safety glass work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-24-brainstuff-safety-glass.mp3</link>
            <description>Laminated safety glass has been around since the 1920s. Find out how safety glass is made, how it works and what it's used for in this episode of BrainStuff.</description>
            <pubDate>Mon, 24 May 2010 17:06:41 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-24-brainstuff-safety-glass.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-24-brainstuff-safety-glass.mp3' length='2055564' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, safety glass, autoglass, laminated safety glass</itunes:keywords>
            <itunes:duration>00:03:21</itunes:duration>
            <itunes:subtitle>Laminated safety glass has been around since the 1920s. Find out how safety glass is made, how it works and what it's used for in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do thirty pounds of air in your tires hold up two tons of car?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-21-brainstuff-tire-pressure.mp3</link>
            <description>Cars are heavy machines, so how can a few small, pressurized tires support their weight? Marshall Brain explains how tire pressure and contact patches work in this episode.</description>
            <pubDate>Fri, 21 May 2010 12:53:13 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-21-brainstuff-tire-pressure.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-21-brainstuff-tire-pressure.mp3' length='1933572' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, tire pressure, contact patch, run flat tires</itunes:keywords>
            <itunes:duration>00:03:09</itunes:duration>
            <itunes:subtitle>Cars are heavy machines, so how can a few small, pressurized tires support their weight? Marshall Brain explains how tire pressure and contact patches work in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do Wint-O-Green Life Savers spark in the dark?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-19-brainstuff-sparking-lifesavers.mp3</link>
            <description>If you've ever bitten into a Wint-O-Green Life Saver candy in the dark, you've probably noticed an accompanying spark of light. Marshall Brain explains the chemistry behind this phenomenon, called triboluminescence, in this episode.</description>
            <pubDate>Wed, 19 May 2010 12:16:09 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-19-brainstuff-sparking-lifesavers.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-19-brainstuff-sparking-lifesavers.mp3' length='1640217' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, triboluminescence, wint-o-green life savers spark, methyl salicylate</itunes:keywords>
            <itunes:duration>00:02:39</itunes:duration>
            <itunes:subtitle>If you've ever bitten into a Wint-O-Green Life Saver candy in the dark, you've probably noticed an accompanying spark of light. Marshall Brain explains the chemistry behind this phenomenon, called triboluminescence, in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a credit card's magnetic stripe work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-17-brainstuff-magstripe.mp3</link>
            <description>The magnetic stripe on the back of the card plays a key role in transactions made by credit card. Learn more about how these &quot;mag stripes&quot; work in this episode of BrainStuff.</description>
            <pubDate>Mon, 17 May 2010 15:30:25 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-17-brainstuff-magstripe.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-17-brainstuff-magstripe.mp3' length='2782029' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, credit card magnetic stripe, mag stripe</itunes:keywords>
            <itunes:duration>00:04:33</itunes:duration>
            <itunes:subtitle>The magnetic stripe on the back of the card plays a key role in transactions made by credit card. Learn more about how these &quot;mag stripes&quot; work in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>When I pay for groceries by check, where does that check go?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-14-brainstuff-checks.mp3</link>
            <description>When you write a check to purchase goods and services, it passes through the hands of several banks before the process is complete. Marshall explains how checks are processed through intermediary banks in this episode.</description>
            <pubDate>Fri, 14 May 2010 13:21:52 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-14-brainstuff-checks.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-14-brainstuff-checks.mp3' length='2947123' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, checks, reserve banks, correspondent banks, clearinghouse banks</itunes:keywords>
            <itunes:duration>00:04:50</itunes:duration>
            <itunes:subtitle>When you write a check to purchase goods and services, it passes through the hands of several banks before the process is complete. Marshall explains how checks are processed through intermediary banks in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a blowout preventer?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-12-brainstuff-blowout-preventers.mp3</link>
            <description>The massive oil spill currently flooding the Gulf of Mexico should have been prevented by a fail-safe device called a Blowout Preventer, or BOP. Find out how this safety mechanism is supposed to work -- and why it didn't -- in this episode.</description>
            <pubDate>Wed, 12 May 2010 15:09:22 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-12-brainstuff-blowout-preventers.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-12-brainstuff-blowout-preventers.mp3' length='2988657' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, blowout preventer, gulf of mexico oil spill</itunes:keywords>
            <itunes:duration>00:04:54</itunes:duration>
            <itunes:subtitle>The massive oil spill currently flooding the Gulf of Mexico should have been prevented by a fail-safe device called a Blowout Preventer, or BOP. Find out how this safety mechanism is supposed to work -- and why it didn't -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is a popsicle called a quiescently frozen confection?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-10-brainstuff-popsicle.mp3</link>
            <description>Popsicles are also called &quot;quiescently frozen confections&quot; because of the way they're frozen. Learn more about how flavored ice treats are made -- and what distinguishes them from ice cream -- in this episode.</description>
            <pubDate>Mon, 10 May 2010 14:48:25 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-10-brainstuff-popsicle.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-10-brainstuff-popsicle.mp3' length='1545131' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, popsicle, quiescently frozen confection, overrunning, ice cream</itunes:keywords>
            <itunes:duration>00:02:30</itunes:duration>
            <itunes:subtitle>Popsicles are also called &quot;quiescently frozen confections&quot; because of the way they're frozen. Learn more about how flavored ice treats are made -- and what distinguishes them from ice cream -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does the ball return work on a pool table?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-07-brainstuff-pool-ball-return.mp3</link>
            <description>If you've ever played a coin-operated pool table, then you've probably noticed that the table can sense the difference between the cue ball and the other balls in play. But how does this work? Tune in and find out in this podcast.</description>
            <pubDate>Fri, 07 May 2010 14:57:33 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-07-brainstuff-pool-ball-return.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-07-brainstuff-pool-ball-return.mp3' length='2362241' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, pool ball return, pool table</itunes:keywords>
            <itunes:duration>00:03:52</itunes:duration>
            <itunes:subtitle>If you've ever played a coin-operated pool table, then you've probably noticed that the table can sense the difference between the cue ball and the other balls in play. But how does this work? Tune in and find out in this podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Where's the best place to sit in a movie theater?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-05-brainstuff-best-movie-seat.mp3</link>
            <description>When it comes to where you should sit in a movie theater to get the best experience, it's mostly a matter of preference. Except when it comes to sound. Find out why -- and where you should sit  -- in this episode.</description>
            <pubDate>Wed, 05 May 2010 15:36:29 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-05-brainstuff-best-movie-seat.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-05-brainstuff-best-movie-seat.mp3' length='1521882' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, best movie seat, brainstuff</itunes:keywords>
            <itunes:duration>00:02:27</itunes:duration>
            <itunes:subtitle>When it comes to where you should sit in a movie theater to get the best experience, it's mostly a matter of preference. Except when it comes to sound. Find out why -- and where you should sit  -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is it harmful to breathe 100-percent oxygen?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-03-brainstuff-oxygen.mp3</link>
            <description>Oxygen is a necessary component of the air we breathe; but in its pure form, it can be hazardous to one's health. Marshall Brain explains how breathing pure oxygen harms the human body in this episode.</description>
            <pubDate>Mon, 03 May 2010 14:40:14 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-03-brainstuff-oxygen.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-05-03-brainstuff-oxygen.mp3' length='2695564' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, 100-percent oxygen, breathing pure oxygen dangerous</itunes:keywords>
            <itunes:duration>00:04:25</itunes:duration>
            <itunes:subtitle>Oxygen is a necessary component of the air we breathe; but in its pure form, it can be hazardous to one's health. Marshall Brain explains how breathing pure oxygen harms the human body in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a CB radio antenna work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-30-brainstuff-cb-antenna.mp3</link>
            <description>A citizens band (CB) radio is often used by truck drivers to communicate while on the road, but how does it work? Marshall Brain gives a detailed explanation of how a CB radio's antenna works in this episode.</description>
            <pubDate>Fri, 30 Apr 2010 10:37:08 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-30-brainstuff-cb-antenna.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-30-brainstuff-cb-antenna.mp3' length='2753817' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, cb radio antenna, impedance, radio frequencies</itunes:keywords>
            <itunes:duration>00:04:31</itunes:duration>
            <itunes:subtitle>A citizens band (CB) radio is often used by truck drivers to communicate while on the road, but how does it work? Marshall Brain gives a detailed explanation of how a CB radio's antenna works in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why does the moon look bigger when it's near the horizon?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-28-brainstuff-moon-illusion.mp3</link>
            <description>When the moon is near the horizon, it appears to be much bigger than when it's high in the sky. But is it really larger? Tune in to find out.</description>
            <pubDate>Wed, 28 Apr 2010 15:27:25 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-28-brainstuff-moon-illusion.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-28-brainstuff-moon-illusion.mp3' length='1963612' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, moon illusion, shape constancy, size constancy</itunes:keywords>
            <itunes:duration>00:03:12</itunes:duration>
            <itunes:subtitle>When the moon is near the horizon, it appears to be much bigger than when it's high in the sky. But is it really larger? Tune in to find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does residential real estate work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-26-brainstuff-real-estate.mp3</link>
            <description>There are many different types of residential real estate: traditional houses, condos, mobile homes, etc. But what's the difference between these types? Marshall Brain breaks it down for you in this episode of BrainStuff.</description>
            <pubDate>Mon, 26 Apr 2010 12:18:16 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-26-brainstuff-real-estate.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-26-brainstuff-real-estate.mp3' length='3361686' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, residential real estate, co-op, townhome</itunes:keywords>
            <itunes:duration>00:05:31</itunes:duration>
            <itunes:subtitle>There are many different types of residential real estate: traditional houses, condos, mobile homes, etc. But what's the difference between these types? Marshall Brain breaks it down for you in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What are chiggers, and how do they bite you?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-23-brainstuff-chiggers.mp3</link>
            <description>If you go outdoors during the right time of year, you may be bitten by chiggers. But what are these creatures, and why do they attack unsuspecting humans? Listen in as Marshall Brain breaks down the life cycle of the chigger -- and how it can affect you.</description>
            <pubDate>Fri, 23 Apr 2010 16:32:50 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-23-brainstuff-chiggers.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-23-brainstuff-chiggers.mp3' length='2370078' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, chiggers, mites</itunes:keywords>
            <itunes:duration>00:03:53</itunes:duration>
            <itunes:subtitle>If you go outdoors during the right time of year, you may be bitten by chiggers. But what are these creatures, and why do they attack unsuspecting humans? Listen in as Marshall Brain breaks down the life cycle of the chigger -- and how it can affect you.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How big does a meteor have to be to reach the ground?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-21-brainstuff-meteors.mp3</link>
            <description>If you've spent much time looking up at the night sky, then you've probably seen some spectacular meteor showers. But how big do these things have to be make it through Earth's atmosphere and reach the ground? Tune in and find out.</description>
            <pubDate>Wed, 21 Apr 2010 17:46:44 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-21-brainstuff-meteors.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-21-brainstuff-meteors.mp3' length='3012429' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall brain, meteor, meteor impact</itunes:keywords>
            <itunes:duration>00:04:57</itunes:duration>
            <itunes:subtitle>If you've spent much time looking up at the night sky, then you've probably seen some spectacular meteor showers. But how big do these things have to be make it through Earth's atmosphere and reach the ground? Tune in and find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is the sound on vinyl records better than on CDs?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-19-brainstuff-cd-vs-vinyl.mp3</link>
            <description>The sound quality of vinyl records is sometimes better than that of CDs and DVDs -- and sometimes worse. Learn more about the difference between the sound quality of records, CDs and DVDs in this episode.</description>
            <pubDate>Mon, 19 Apr 2010 14:20:32 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-19-brainstuff-cd-vs-vinyl.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-19-brainstuff-cd-vs-vinyl.mp3' length='1882569' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, vinyl records vs cds, analog, digital</itunes:keywords>
            <itunes:duration>00:03:03</itunes:duration>
            <itunes:subtitle>The sound quality of vinyl records is sometimes better than that of CDs and DVDs -- and sometimes worse. Learn more about the difference between the sound quality of records, CDs and DVDs in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does high-speed rail work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-16-brainstuff-high-speed-rail.mp3</link>
            <description>Although it's common in some countries, high-speed rail service isn't available in the United States -- yet. Tune in to learn more about this swift rail service -- and how soon we're likely to have it in the U.S. -- in this episode.</description>
            <pubDate>Fri, 16 Apr 2010 10:52:52 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-16-brainstuff-high-speed-rail.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-16-brainstuff-high-speed-rail.mp3' length='3162372' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, high-speed rail, amtrak acela, dedicated high-speed tracks</itunes:keywords>
            <itunes:duration>00:05:11</itunes:duration>
            <itunes:subtitle>Although it's common in some countries, high-speed rail service isn't available in the United States -- yet. Tune in to learn more about this swift rail service -- and how soon we're likely to have it in the U.S. -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do you decaffeinate coffee and tea?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-14-brainstuff-decaff.mp3</link>
            <description>There are multiple methods of removing caffeine from naturally caffeinated plant products. Learn more about these processes -- and how much caffeine they really remove -- in this episode.</description>
            <pubDate>Wed, 14 Apr 2010 10:53:16 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-14-brainstuff-decaff.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-14-brainstuff-decaff.mp3' length='2606225' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, brainstuff, decaffeination process, decaf tea, decaf coffee</itunes:keywords>
            <itunes:duration>00:04:16</itunes:duration>
            <itunes:subtitle>There are multiple methods of removing caffeine from naturally caffeinated plant products. Learn more about these processes -- and how much caffeine they really remove -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why can't a couch potato run a marathon?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-12-brainstuff-athletes.mp3</link>
            <description>Intuitively, it makes sense that a trained athlete can run a marathon easily, while a &quot;couch potato&quot; can barely run a mile. But what's the biology behind it? Find out how fit and unfit bodies respond to exercise in this episode.</description>
            <pubDate>Mon, 12 Apr 2010 17:02:35 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-12-brainstuff-athletes.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-12-brainstuff-athletes.mp3' length='2502780' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, couch potato, exercise, marathon, aerobic metabolism</itunes:keywords>
            <itunes:duration>00:04:05</itunes:duration>
            <itunes:subtitle>Intuitively, it makes sense that a trained athlete can run a marathon easily, while a &quot;couch potato&quot; can barely run a mile. But what's the biology behind it? Find out how fit and unfit bodies respond to exercise in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do I know if my catalytic converter has failed?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-09-brainstuff-failed-catalytic-converter.mp3</link>
            <description>An automobile's catalytic converter uses a catalyst to convert harmful exhaust fumes into harmless ones. Find out what happens when your catalytic converter stops working properly -- and how you can tell -- in this episode.</description>
            <pubDate>Fri, 09 Apr 2010 13:53:40 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-09-brainstuff-failed-catalytic-converter.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-09-brainstuff-failed-catalytic-converter.mp3' length='1832478' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, failed catalytic converter, catalytic converter</itunes:keywords>
            <itunes:duration>00:02:58</itunes:duration>
            <itunes:subtitle>An automobile's catalytic converter uses a catalyst to convert harmful exhaust fumes into harmless ones. Find out what happens when your catalytic converter stops working properly -- and how you can tell -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How much coal does a light bulb need to run for a year?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-07-brainstuff-coal-bulb.mp3</link>
            <description>How much coal do you need to run a 100-watt light bulb 24 hours a day for a year? Find out in this episode of BrainStuff.</description>
            <pubDate>Wed, 07 Apr 2010 14:50:28 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-07-brainstuff-coal-bulb.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-07-brainstuff-coal-bulb.mp3' length='1962568' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, 100-watt light bulb, kilowatt-hours, coal</itunes:keywords>
            <itunes:duration>00:03:11</itunes:duration>
            <itunes:subtitle>How much coal do you need to run a 100-watt light bulb 24 hours a day for a year? Find out in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is the Strategic Petroleum Reserve?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-05-brainstuff-petroleum-reserve.mp3</link>
            <description>The Strategic Petroleum Reserve is the world's largest emergency oil stockpile. Find out why the United States created this reserve -- and where the oil is stored -- in this episode.</description>
            <pubDate>Mon, 05 Apr 2010 13:37:30 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-05-brainstuff-petroleum-reserve.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-05-brainstuff-petroleum-reserve.mp3' length='1725115' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, strategic petroleum reserve, marshall brain, brainstuff, oil reserve</itunes:keywords>
            <itunes:duration>00:02:48</itunes:duration>
            <itunes:subtitle>The Strategic Petroleum Reserve is the world's largest emergency oil stockpile. Find out why the United States created this reserve -- and where the oil is stored -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does bulletproof glass work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-02-brainstuff-bulletproof-glass.mp3</link>
            <description>Bullet-resistant glass, commonly referred to as &quot;bulletproof,&quot; is a special type of glass designed to resist bullets. Tune in to this episode to learn how different types of bullet-resistant glass work.</description>
            <pubDate>Fri, 02 Apr 2010 11:06:38 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-02-brainstuff-bulletproof-glass.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-04-02-brainstuff-bulletproof-glass.mp3' length='1959694' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, lamination, bullet-resistant glass, polycarbonate, bulletproof glass</itunes:keywords>
            <itunes:duration>00:03:11</itunes:duration>
            <itunes:subtitle>Bullet-resistant glass, commonly referred to as &quot;bulletproof,&quot; is a special type of glass designed to resist bullets. Tune in to this episode to learn how different types of bullet-resistant glass work.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What causes the smell after rain?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-31-brainstuff-rain-smell.mp3</link>
            <description>The smell of rain is often linked with spring, and it's been alluded to in poems, songs and stories for centuries. But what exactly causes this distinctive smell? Tune in and find out.</description>
            <pubDate>Wed, 31 Mar 2010 16:13:51 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-31-brainstuff-rain-smell.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-31-brainstuff-rain-smell.mp3' length='2386012' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, bacteria, rainfall, rain smell</itunes:keywords>
            <itunes:duration>00:03:54</itunes:duration>
            <itunes:subtitle>The smell of rain is often linked with spring, and it's been alluded to in poems, songs and stories for centuries. But what exactly causes this distinctive smell? Tune in and find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What would happen if the polar ice caps melted?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-29-brainstuff-ice-caps.mp3</link>
            <description>Learn more about melting ice caps, global warming and rising sea levels in this episode of BrainStuff.</description>
            <pubDate>Mon, 29 Mar 2010 14:38:49 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-29-brainstuff-ice-caps.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-29-brainstuff-ice-caps.mp3' length='3127878' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, polar ice caps melting</itunes:keywords>
            <itunes:duration>00:04:17</itunes:duration>
            <itunes:subtitle>Learn more about melting ice caps, global warming and rising sea levels in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why can I play some DVDs, but not others?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-26-brainstuff-dvd-regions.mp3</link>
            <description>Film studios use regional code protection in DVD technology to protect content and to control worldwide release dates. Tune as Marshall Brain breaks down the concept of region codes in this podcast.</description>
            <pubDate>Fri, 26 Mar 2010 15:27:11 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-26-brainstuff-dvd-regions.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-26-brainstuff-dvd-regions.mp3' length='1710718' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall, dvd region</itunes:keywords>
            <itunes:duration>00:02:19</itunes:duration>
            <itunes:subtitle>Film studios use regional code protection in DVD technology to protect content and to control worldwide release dates. Tune as Marshall Brain breaks down the concept of region codes in this podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do the Northern Lights work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-24-brainstuff-northern-lights.mp3</link>
            <description>The Northern Lights, also known as the aurora borealis, occur when charged electrons from the sun interact with the Earth's magnetic field. Learn more about auroras and solar activity in this episode.</description>
            <pubDate>Wed, 24 Mar 2010 12:17:03 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-24-brainstuff-northern-lights.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-24-brainstuff-northern-lights.mp3' length='1933833' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, northern lights, aurora borealis, solar wind</itunes:keywords>
            <itunes:duration>00:03:09</itunes:duration>
            <itunes:subtitle>The Northern Lights, also known as the aurora borealis, occur when charged electrons from the sun interact with the Earth's magnetic field. Learn more about auroras and solar activity in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why should you wash new clothes before wearing them?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-22-brainstuff-wash-new-clothes.mp3</link>
            <description>Some clothes have tags that say &quot;wash before wearing&quot; or &quot;wash separately.&quot; Find out why it's sometimes a good idea to wash new clothes before you wear them in this episode.</description>
            <pubDate>Mon, 22 Mar 2010 13:00:49 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-22-brainstuff-wash-new-clothes.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-22-brainstuff-wash-new-clothes.mp3' length='1527106' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, wash before wearing, wash new clothes</itunes:keywords>
            <itunes:duration>00:02:28</itunes:duration>
            <itunes:subtitle>Some clothes have tags that say &quot;wash before wearing&quot; or &quot;wash separately.&quot; Find out why it's sometimes a good idea to wash new clothes before you wear them in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do most zippers say 'YKK' on the pull-tab?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-19-brainstuff-ykk.mp3</link>
            <description>Have you ever wondered why zippers often have the letters 'YKK' etched into them? Learn more about the Japanese company behind the tiny letters -- and the zippers -- in this episode.</description>
            <pubDate>Fri, 19 Mar 2010 10:49:29 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-19-brainstuff-ykk.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-19-brainstuff-ykk.mp3' length='1411123' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, marshall brain, zippers ykk, zippers, zippers Japan</itunes:keywords>
            <itunes:duration>00:02:16</itunes:duration>
            <itunes:subtitle>Have you ever wondered why zippers often have the letters 'YKK' etched into them? Learn more about the Japanese company behind the tiny letters -- and the zippers -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do they get the lead in a wooden pencil?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-17-brainstuff-pencil.mp3</link>
            <description>Today's pencils are manufactured very differently than the original versions; but they still use a material called graphite, which isn't lead at all. How does the graphite get in the pencil? Find out in this episode.</description>
            <pubDate>Wed, 17 Mar 2010 13:01:26 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-17-brainstuff-pencil.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-17-brainstuff-pencil.mp3' length='2250437' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, marshall brain, lead pencil, graphite, pencil</itunes:keywords>
            <itunes:duration>00:03:40</itunes:duration>
            <itunes:subtitle>Today's pencils are manufactured very differently than the original versions; but they still use a material called graphite, which isn't lead at all. How does the graphite get in the pencil? Find out in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does your stomach keep from digesting itself?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-15-brainstuff-stomach.mp3</link>
            <description>The stomach is a hollow, many-layered organ that produces powerful acids to break down food -- and another substance to protect the stomach from being digested. Find out what this substance is, and learn more about the stomach, in this episode.</description>
            <pubDate>Mon, 15 Mar 2010 12:25:41 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-15-brainstuff-stomach.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-15-brainstuff-stomach.mp3' length='1595286' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, autodigestion of the stomach, serosa, mucosa, stomach acid, stomach bicarbonate</itunes:keywords>
            <itunes:duration>00:02:35</itunes:duration>
            <itunes:subtitle>The stomach is a hollow, many-layered organ that produces powerful acids to break down food -- and another substance to protect the stomach from being digested. Find out what this substance is, and learn more about the stomach, in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do newspapers turn yellow over time?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-12-brainstuff-paper-yellow.mp3</link>
            <description>Newspapers turn yellow over time because they contain lignin, a substance in wood that oxidates when exposed to air and light. Learn more about lignin and paper processing in this episode of BrainStuff.</description>
            <pubDate>Fri, 12 Mar 2010 13:48:30 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-12-brainstuff-paper-yellow.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-12-brainstuff-paper-yellow.mp3' length='1855727' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, lignin, newspapers yellow, white cellulose, paper oxidation</itunes:keywords>
            <itunes:duration>00:03:01</itunes:duration>
            <itunes:subtitle>Newspapers turn yellow over time because they contain lignin, a substance in wood that oxidates when exposed to air and light. Learn more about lignin and paper processing in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do self-setting clocks work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-10-brainstuff-self-setting-clocks.mp3</link>
            <description>Self-setting clocks and watches synchronize themselves with the atomic clock in Colorado with the help of a special radio station. Find out how -- and learn more about NIST's radio station -- in this episode.</description>
            <pubDate>Wed, 10 Mar 2010 12:28:21 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-10-brainstuff-self-setting-clocks.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-10-brainstuff-self-setting-clocks.mp3' length='2119302' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, self-setting clocks, atomic clock Colorado, NIST, WWVB radio station, bcd</itunes:keywords>
            <itunes:duration>00:03:27</itunes:duration>
            <itunes:subtitle>Self-setting clocks and watches synchronize themselves with the atomic clock in Colorado with the help of a special radio station. Find out how -- and learn more about NIST's radio station -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How many calories does a person need daily?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-08-brainstuff-calories.mp3</link>
            <description>The amount of calories a person needs to consume on a daily basis varies by individual. Discover the three factors that can help you determine your daily caloric needs in this episode of BrainStuff.</description>
            <pubDate>Mon, 08 Mar 2010 13:20:26 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-08-brainstuff-calories.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-08-brainstuff-calories.mp3' length='2182519' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, daily calories, basal metabolic rate, thermic effect of food, calories</itunes:keywords>
            <itunes:duration>00:03:33</itunes:duration>
            <itunes:subtitle>The amount of calories a person needs to consume on a daily basis varies by individual. Discover the three factors that can help you determine your daily caloric needs in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What would happen if you fired a gun on a moving train?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-05-brainstuff-gun-from-train.mp3</link>
            <description>If you fired a gun from a train moving at the speed of a bullet, what would happen? It depends on your frame of reference. Learn more about reference frames and physics in this episode of BrainStuff.</description>
            <pubDate>Fri, 05 Mar 2010 13:29:23 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-05-brainstuff-gun-from-train.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-05-brainstuff-gun-from-train.mp3' length='2261147' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, reference frames, physics, frame of reference, gun fired from train</itunes:keywords>
            <itunes:duration>00:03:41</itunes:duration>
            <itunes:subtitle>If you fired a gun from a train moving at the speed of a bullet, what would happen? It depends on your frame of reference. Learn more about reference frames and physics in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What constitutes a person's IQ?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-03-brainstuff-iq.mp3</link>
            <description>Your IQ, or intelligence quotient, is a reflection of how well you perform on a specific test that measures cognitive abilities. Learn more about IQ tests in this episode.</description>
            <pubDate>Wed, 03 Mar 2010 14:13:25 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-03-brainstuff-iq.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-03-brainstuff-iq.mp3' length='3494910' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, IQ, intelligence quotient, IQ test, intelligence test, cognitive abilities test</itunes:keywords>
            <itunes:duration>00:05:45</itunes:duration>
            <itunes:subtitle>Your IQ, or intelligence quotient, is a reflection of how well you perform on a specific test that measures cognitive abilities. Learn more about IQ tests in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a QWERTY keyboard work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-01-brainstuff-qwerty.mp3</link>
            <description>The QWERTY keyboard is the standard for most computers today, but why are the letters arranged in such a peculiar way? Learn more about the QWERTY keyboard's unusual layout -- and how it compares to the Dvorak design -- in this episode.</description>
            <pubDate>Mon, 01 Mar 2010 12:09:51 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-01-brainstuff-qwerty.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-03-01-brainstuff-qwerty.mp3' length='2310257' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, QWERTY keyboard, Christopher Sholes, qwerty keyboard typewriter</itunes:keywords>
            <itunes:duration>00:03:46</itunes:duration>
            <itunes:subtitle>The QWERTY keyboard is the standard for most computers today, but why are the letters arranged in such a peculiar way? Learn more about the QWERTY keyboard's unusual layout -- and how it compares to the Dvorak design -- in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do a zebra's stripes act as camoflauge?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-26-brainstuff-zebra-stripes.mp3</link>
            <description>A zebra's stripes offer protection from predators in the form of camoflauge -- and a way to identify individual members within the larger group. Learn more about zebra stripes in this episode.</description>
            <pubDate>Fri, 26 Feb 2010 12:38:59 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-26-brainstuff-zebra-stripes.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-26-brainstuff-zebra-stripes.mp3' length='2173115' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, zebra stripes camoflauge, lions colorblind, zebra stripe patterns, zebra stripes</itunes:keywords>
            <itunes:duration>00:03:33</itunes:duration>
            <itunes:subtitle>A zebra's stripes offer protection from predators in the form of camoflauge -- and a way to identify individual members within the larger group. Learn more about zebra stripes in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What does RSVP mean?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-24-brainstuff-rsvp.mp3</link>
            <description>Most people are familiar with the concept of replying to a party invitation via R.S.V.P., but what exactly do those letters stand for? Find out -- and learn more about the origins and practices of etiquette -- in this episode of BrainStuff.</description>
            <pubDate>Wed, 24 Feb 2010 14:16:24 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-24-brainstuff-rsvp.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-24-brainstuff-rsvp.mp3' length='2092396' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, rsvp meaning, rsvp, etiquette, rsvp etiquette, etiquette versailles, rsvp french</itunes:keywords>
            <itunes:duration>00:03:24</itunes:duration>
            <itunes:subtitle>Most people are familiar with the concept of replying to a party invitation via R.S.V.P., but what exactly do those letters stand for? Find out -- and learn more about the origins and practices of etiquette -- in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What do the brake warning lights mean in my car?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-22-brainstuff-brake-light.mp3</link>
            <description>The brake warning lights in your car light up as part of a routine test; but when they stay on, they indicate that there's something wrong with your brake system. Learn more about brake warning lights in this episode.</description>
            <pubDate>Mon, 22 Feb 2010 12:20:40 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-22-brainstuff-brake-light.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-22-brainstuff-brake-light.mp3' length='1644396' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brake warning lights, brainstuff, brake system, abs,</itunes:keywords>
            <itunes:duration>00:02:40</itunes:duration>
            <itunes:subtitle>The brake warning lights in your car light up as part of a routine test; but when they stay on, they indicate that there's something wrong with your brake system. Learn more about brake warning lights in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Does drinking ice water burn calories?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-19-brainstuff-ice-water-calories.mp3</link>
            <description>When you drink cold water, your body exerts an effort to warm up the liquid and, in doing so, burns calories. So does that make drinking ice water an effective weight loss strategy? Find out in this episode of BrainStuff.</description>
            <pubDate>Fri, 19 Feb 2010 12:29:24 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-19-brainstuff-ice-water-calories.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-19-brainstuff-ice-water-calories.mp3' length='1566812' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, does drinking ice water burn calories, ice water calories</itunes:keywords>
            <itunes:duration>00:02:32</itunes:duration>
            <itunes:subtitle>When you drink cold water, your body exerts an effort to warm up the liquid and, in doing so, burns calories. So does that make drinking ice water an effective weight loss strategy? Find out in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do British royal titles work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-17-brainstuff-royal-titles.mp3</link>
            <description>In this episode of BrainStuff, Marshall Brain gives a detailed explanation of how British royal titles work.</description>
            <pubDate>Wed, 17 Feb 2010 16:10:30 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-17-brainstuff-royal-titles.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-17-brainstuff-royal-titles.mp3' length='3265294' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, British royal titles, peerage, duchdom, dukes, inherited peerage, life peerage</itunes:keywords>
            <itunes:duration>00:05:22</itunes:duration>
            <itunes:subtitle>In this episode of BrainStuff, Marshall Brain gives a detailed explanation of how British royal titles work.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do blimps work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-15-brainstuff-blimps.mp3</link>
            <description>Tune in to this episode of BrainStuff to learn more about blimps, from how they work to why they're a popular medium for advertisin</description>
            <pubDate>Mon, 15 Feb 2010 19:21:35 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-15-brainstuff-blimps.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-15-brainstuff-blimps.mp3' length='3527992' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, blimps, gondola blimp, blimp helium, blimp advertising, ballonets, blimp leds</itunes:keywords>
            <itunes:duration>00:04:53</itunes:duration>
            <itunes:subtitle>Tune in to this episode of BrainStuff to learn more about blimps, from how they work to why they're a popular medium for advertisin</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does rust work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-12-brainstuff-rust.mp3</link>
            <description>In this episode of BrainStuff, Marshall Brain explains the chemistry behind rust, or iron oxide, and the rusting process.</description>
            <pubDate>Fri, 12 Feb 2010 12:59:52 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-12-brainstuff-rust.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-12-brainstuff-rust.mp3' length='1527890' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, rust, iron oxide, anode, cathode, electrolyte, rusting metals, corrosion</itunes:keywords>
            <itunes:duration>00:02:28</itunes:duration>
            <itunes:subtitle>In this episode of BrainStuff, Marshall Brain explains the chemistry behind rust, or iron oxide, and the rusting process.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>In baseball, how does a pitcher throw a curveball?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-10-brainstuff-curve-ball.mp3</link>
            <description>A curveball is a pitcher's secret weapon for striking out batters. Discover the physics behind a great curveball in this episode of BrainStuff.</description>
            <pubDate>Wed, 10 Feb 2010 10:36:12 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-10-brainstuff-curve-ball.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-10-brainstuff-curve-ball.mp3' length='1856249' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, curveball, topspin, pitcher, magnus effect, heinrich gustav magnus, curveball physics</itunes:keywords>
            <itunes:duration>00:03:01</itunes:duration>
            <itunes:subtitle>A curveball is a pitcher's secret weapon for striking out batters. Discover the physics behind a great curveball in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do mood rings work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-08-brainstuff-mood-ring.mp3</link>
            <description>Mood rings claim to reflect changes in your emotional state -- and, in a way, they do. Discover the science behind mood rings in this episode of BrainStuff.</description>
            <pubDate>Mon, 08 Feb 2010 12:19:34 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-08-brainstuff-mood-ring.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-08-brainstuff-mood-ring.mp3' length='2573310' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, mood rings, thermotropic liquid crystals, mood rings temperature, liquid crystals</itunes:keywords>
            <itunes:duration>00:04:13</itunes:duration>
            <itunes:subtitle>Mood rings claim to reflect changes in your emotional state -- and, in a way, they do. Discover the science behind mood rings in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What makes your knuckles pop?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-05-brainstuff-knuckle-popping.mp3</link>
            <description>Learn more about the anatomy (and chemistry) behind that popping sound your knuckles make when you crack them in this episode of BrainStuff.</description>
            <pubDate>Fri, 05 Feb 2010 11:20:43 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-05-brainstuff-knuckle-popping.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-05-brainstuff-knuckle-popping.mp3' length='2140461' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, what makes your knuckles pop, joints, synovial fluid, cavitation</itunes:keywords>
            <itunes:duration>00:03:29</itunes:duration>
            <itunes:subtitle>Learn more about the anatomy (and chemistry) behind that popping sound your knuckles make when you crack them in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Could I see a flashlight beam from Earth on the moon?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-03-brainstuff-moon-flashlight.mp3</link>
            <description>If you shone a flashlight beam from Earth, would you be able to see it from the moon? It depends. Find out why -- and get a lesson in how light works -- in this episode of BrainStuff.</description>
            <pubDate>Wed, 03 Feb 2010 13:26:36 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-03-brainstuff-moon-flashlight.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-03-brainstuff-moon-flashlight.mp3' length='2022388' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, photons, flashlight moon, photons, light, telescope, flashlight beam, laser</itunes:keywords>
            <itunes:duration>00:03:17</itunes:duration>
            <itunes:subtitle>If you shone a flashlight beam from Earth, would you be able to see it from the moon? It depends. Find out why -- and get a lesson in how light works -- in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do Voyager 1 and 2 transmit messages from far away?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-01-brainstuff-voyager_1-2.mp3</link>
            <description>Spacecraft Voyager 1 and Voyager 2 transmit images of space and its contents from great distances, but how? Learn more about the technology that allows them to send radio messages from far, far away in this episode of BrainStuff.</description>
            <pubDate>Mon, 01 Feb 2010 13:13:30 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-01-brainstuff-voyager_1-2.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-02-01-brainstuff-voyager_1-2.mp3' length='1926519' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, voyager 1, voyager 2, voyager antenna, voyager radio frequencies</itunes:keywords>
            <itunes:duration>00:03:08</itunes:duration>
            <itunes:subtitle>Spacecraft Voyager 1 and Voyager 2 transmit images of space and its contents from great distances, but how? Learn more about the technology that allows them to send radio messages from far, far away in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do stabilizer bars work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-29-brainstuff-stabilizer-bar.mp3</link>
            <description>Stabilizer bars are designed to keep your car from rolling when you make sharp turns. Learn more about how these bars work in this episode of BrainStuff.</description>
            <pubDate>Fri, 29 Jan 2010 12:06:20 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-29-brainstuff-stabilizer-bar.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-29-brainstuff-stabilizer-bar.mp3' length='2399688' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, stabilizer bar, anti-roll bar, anti-sway bar, suspension system</itunes:keywords>
            <itunes:duration>00:03:16</itunes:duration>
            <itunes:subtitle>Stabilizer bars are designed to keep your car from rolling when you make sharp turns. Learn more about how these bars work in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is it true that a diesel engine can operate underwater?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-27-brainstuff-waterproof-diesel.mp3</link>
            <description>Under certain circumstances, diesel engines can operate while submerged in water. Find out what it takes to waterproof an engine -- and why diesel engines are better candidates than their  gasoline counterparts -- in this episode of BrainStuff.</description>
            <pubDate>Wed, 27 Jan 2010 14:52:35 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-27-brainstuff-waterproof-diesel.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-27-brainstuff-waterproof-diesel.mp3' length='2014029' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, diesel engine waterproof, waterproof engine, how to waterproof an engine</itunes:keywords>
            <itunes:duration>00:03:17</itunes:duration>
            <itunes:subtitle>Under certain circumstances, diesel engines can operate while submerged in water. Find out what it takes to waterproof an engine -- and why diesel engines are better candidates than their  gasoline counterparts -- in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can the grass on a golf course green be so perfect?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-25-brainstuff-golf-green-final.mp3</link>
            <description>The greens on a golf course are famously smooth and perfect-looking, but how do they get that way? Discover how careful planning, the right ingredients and a whole lot of maintenance yield a flawless green in this episode of BrainStuff.</description>
            <pubDate>Mon, 25 Jan 2010 11:59:53 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-25-brainstuff-golf-green-final.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-25-brainstuff-golf-green-final.mp3' length='1556886' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, golf course green maintenance, golf course green construction, golf greens</itunes:keywords>
            <itunes:duration>00:02:31</itunes:duration>
            <itunes:subtitle>The greens on a golf course are famously smooth and perfect-looking, but how do they get that way? Discover how careful planning, the right ingredients and a whole lot of maintenance yield a flawless green in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a toaster work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-22-brainstuff-toaster.mp3</link>
            <description>Toasting is a tasty way to increase the durability of bread, and automatic toasters are a convenient way to make toast. Learn more about the chemical change that turns bread into toast and the mechanism behind toasters in this episode of BrainStuff.</description>
            <pubDate>Fri, 22 Jan 2010 11:49:40 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-22-brainstuff-toaster.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-22-brainstuff-toaster.mp3' length='2930143' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, toaster, toast, nichrome wire, pop-up toaster, maillard reaction, toaster timer</itunes:keywords>
            <itunes:duration>00:04:48</itunes:duration>
            <itunes:subtitle>Toasting is a tasty way to increase the durability of bread, and automatic toasters are a convenient way to make toast. Learn more about the chemical change that turns bread into toast and the mechanism behind toasters in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a gas pump know when the fuel tank is full?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-20-brainstuff-gas-pump.mp3</link>
            <description>If you've ever put gas in a car, you've probably noticed how the gas pump shuts off when your tank is full. But how does it know to do that? Learn more about the clever mechanism that keeps your gas tank from overflowing in this episode of BrainStuff.</description>
            <pubDate>Wed, 20 Jan 2010 12:36:35 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-20-brainstuff-gas-pump.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-20-brainstuff-gas-pump.mp3' length='1226959' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, how does a gas pump know when to stop?</itunes:keywords>
            <itunes:duration>00:01:58</itunes:duration>
            <itunes:subtitle>If you've ever put gas in a car, you've probably noticed how the gas pump shuts off when your tank is full. But how does it know to do that? Learn more about the clever mechanism that keeps your gas tank from overflowing in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How cell phones work</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-18-brainstuff-cell-phones.mp3</link>
            <description>Today's cell phones are amazingly compact, complex devices that provide a wide array of services. Discover the origins of these technological wonders, and the technology that makes them work, in this episode of BrainStuff.</description>
            <pubDate>Mon, 18 Jan 2010 19:07:25 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-18-brainstuff-cell-phones.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-18-brainstuff-cell-phones.mp3' length='3168902' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, cell phones, cell phone towers, walkie talkies, radio frequencies</itunes:keywords>
            <itunes:duration>00:05:12</itunes:duration>
            <itunes:subtitle>Today's cell phones are amazingly compact, complex devices that provide a wide array of services. Discover the origins of these technological wonders, and the technology that makes them work, in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Where did the hamburger get its name?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-15-brainstuff-hamburger.mp3</link>
            <description>The word 'hamburger' seems to imply that pork is a main ingredient, but in fact, this famous beef sandwich got its name from a city. Learn more about the origins and spread of the hamburger in this episode of BrainStuff.</description>
            <pubDate>Fri, 15 Jan 2010 11:06:35 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-15-brainstuff-hamburger.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-15-brainstuff-hamburger.mp3' length='1454486' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, hamburger, Hamburg Germany, Hamburg steak, Mcdonalds, white castle</itunes:keywords>
            <itunes:duration>00:02:21</itunes:duration>
            <itunes:subtitle>The word 'hamburger' seems to imply that pork is a main ingredient, but in fact, this famous beef sandwich got its name from a city. Learn more about the origins and spread of the hamburger in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do one-way mirrors work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-13-brainstuff-oneway-mirror.mp3</link>
            <description>One-way mirrors are ubiquitous in crime dramas, but how do they work? Discover the secret behind one-way mirrors in this episode of BrainStuff.</description>
            <pubDate>Wed, 13 Jan 2010 10:11:29 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-13-brainstuff-oneway-mirror.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-13-brainstuff-oneway-mirror.mp3' length='1871139' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, one-way mirror, half-silvered surface, reflective coating, reflective molecules</itunes:keywords>
            <itunes:duration>00:03:02</itunes:duration>
            <itunes:subtitle>One-way mirrors are ubiquitous in crime dramas, but how do they work? Discover the secret behind one-way mirrors in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do torpedo engines work if they're underwater?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-11-brainstuff-torpedo-engine.mp3</link>
            <description>Torpedo engines rely on special methods of propulsion to operate underwater. Find out what they are in this episode of BrainStuff.</description>
            <pubDate>Mon, 11 Jan 2010 13:28:52 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-11-brainstuff-torpedo-engine.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-11-brainstuff-torpedo-engine.mp3' length='1490796' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, how do torpedo engines work underwater?, fuel oxidizer, otto fuel</itunes:keywords>
            <itunes:duration>00:02:24</itunes:duration>
            <itunes:subtitle>Torpedo engines rely on special methods of propulsion to operate underwater. Find out what they are in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do kosher foods work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-08-brainstuff-kosher.mp3</link>
            <description>In this episode of BrainStuff, Marshall Brain gives a detailed explanation of the Jewish dietary laws and preparations that make foods &quot;kosher&quot; and &quot;pareve.&quot;</description>
            <pubDate>Fri, 08 Jan 2010 11:04:04 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-08-brainstuff-kosher.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-08-brainstuff-kosher.mp3' length='2045115' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, kosher food, kosher, Jewish dietary laws, kosher food rules</itunes:keywords>
            <itunes:duration>00:03:20</itunes:duration>
            <itunes:subtitle>In this episode of BrainStuff, Marshall Brain gives a detailed explanation of the Jewish dietary laws and preparations that make foods &quot;kosher&quot; and &quot;pareve.&quot;</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do photochromatic lenses work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-06-brainstuff-transition-lenses.mp3</link>
            <description>Photochromatic lenses darken when exposed to the sun. Discover where these lenses came from, how they work and why they're commonly referred to as &quot;transition&quot; lenses in this episode of BrainStuff.</description>
            <pubDate>Wed, 06 Jan 2010 15:09:08 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-06-brainstuff-transition-lenses.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-06-brainstuff-transition-lenses.mp3' length='2222226' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, transition lenses, photochromatic lenses, photochromic lenses, Corning, Transitions lenses</itunes:keywords>
            <itunes:duration>00:03:37</itunes:duration>
            <itunes:subtitle>Photochromatic lenses darken when exposed to the sun. Discover where these lenses came from, how they work and why they're commonly referred to as &quot;transition&quot; lenses in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a movie clapperboard work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-04-brainstuff-clapperboard.mp3</link>
            <description>A movie clapperboard isn't just a placemarker; this device helps movie makers synchronize a movie's audio and video elements. Find out how a traditional movie clapperboard works, as well as a digital one, in this episode of BrainStuff.</description>
            <pubDate>Mon, 04 Jan 2010 12:28:08 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-04-brainstuff-clapperboard.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-04-brainstuff-clapperboard.mp3' length='1658502' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, movie clapperboard, digital slate, how does a movie clapperboard work?</itunes:keywords>
            <itunes:duration>00:02:41</itunes:duration>
            <itunes:subtitle>A movie clapperboard isn't just a placemarker; this device helps movie makers synchronize a movie's audio and video elements. Find out how a traditional movie clapperboard works, as well as a digital one, in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Can cans and string really be used like a telephone?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-01-brainstuff-cans-and-string.mp3</link>
            <description>You've probably heard of this trick before: Connecting two cans with a piece of string in the bottom of each can will supposedly allow people to speak over a distance to one another. Tune in as Marshall Brain explains how it works in this episode.</description>
            <pubDate>Fri, 01 Jan 2010 19:09:50 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-01-brainstuff-cans-and-string.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2010-01-01-brainstuff-cans-and-string.mp3' length='2045898' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, cans and string, can string telephone</itunes:keywords>
            <itunes:duration>00:03:20</itunes:duration>
            <itunes:subtitle>You've probably heard of this trick before: Connecting two cans with a piece of string in the bottom of each can will supposedly allow people to speak over a distance to one another. Tune in as Marshall Brain explains how it works in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do jet engines start?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-30-brainstuff-starting-jet-engine.mp3</link>
            <description>If you've ever watched a jet engine start, you've probably noticed that the blades begin to rotate slowly before spinning up to full speed -- but why? Listen in as Marshall Brain breaks down the science behind jet engines in this episode.</description>
            <pubDate>Wed, 30 Dec 2009 14:35:24 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-30-brainstuff-starting-jet-engine.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-30-brainstuff-starting-jet-engine.mp3' length='1821506' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, jet engine, start jet engine, airplane</itunes:keywords>
            <itunes:duration>00:02:58</itunes:duration>
            <itunes:subtitle>If you've ever watched a jet engine start, you've probably noticed that the blades begin to rotate slowly before spinning up to full speed -- but why? Listen in as Marshall Brain breaks down the science behind jet engines in this episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does Caller ID work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-28-brainstuff-caller-id.mp3</link>
            <description>Almost all cell phones have a capacity for caller ID, which identifies the phone number at the other end of a telephone connection -- but how does it work? Listen in as Marshall Brain breaks down the basics of this surprisingly simple technology.</description>
            <pubDate>Mon, 28 Dec 2009 13:20:16 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-28-brainstuff-caller-id.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-28-brainstuff-caller-id.mp3' length='1906404' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, caller ID, telephone</itunes:keywords>
            <itunes:duration>00:03:06</itunes:duration>
            <itunes:subtitle>Almost all cell phones have a capacity for caller ID, which identifies the phone number at the other end of a telephone connection -- but how does it work? Listen in as Marshall Brain breaks down the basics of this surprisingly simple technology.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does Christmas work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-25-brainstuff-christmas.mp3</link>
            <description>Christmas is the biggest holiday on the American calendar -- but how did it get this way? Travel back in time with Marshall Brain as he explores the evolution of Christmas in this special holiday episode.</description>
            <pubDate>Fri, 25 Dec 2009 11:44:44 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-25-brainstuff-christmas.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-25-brainstuff-christmas.mp3' length='3587645' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, christmas, history of christmas</itunes:keywords>
            <itunes:duration>00:05:54</itunes:duration>
            <itunes:subtitle>Christmas is the biggest holiday on the American calendar -- but how did it get this way? Travel back in time with Marshall Brain as he explores the evolution of Christmas in this special holiday episode.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why doesn't gasoline burn cleanly?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-23-brainstuff-gas-pollution.mp3</link>
            <description>Since gasoline is a liquid formed of carbon and hydrogen, it's possible to trace the chemical reactions in car exhaust and understand what types of pollutants are created by a car's engine. Tune in and learn more about the science behind burning gas.</description>
            <pubDate>Wed, 23 Dec 2009 10:24:37 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-23-brainstuff-gas-pollution.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-23-brainstuff-gas-pollution.mp3' length='1577261' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, gas pollution, catalytic converter, smog, air pollution</itunes:keywords>
            <itunes:duration>00:02:33</itunes:duration>
            <itunes:subtitle>Since gasoline is a liquid formed of carbon and hydrogen, it's possible to trace the chemical reactions in car exhaust and understand what types of pollutants are created by a car's engine. Tune in and learn more about the science behind burning gas.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does the Nobel Prize work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-21-brainstuff-nobel-prize.mp3</link>
            <description>Nobel Prizes are highly prestigious, valuable awards that have been given out to visionaries and pioneers in select fields since 1901. Tune in to find out more about the Nobel Prize in this episode of BrainStuff.</description>
            <pubDate>Mon, 21 Dec 2009 15:00:57 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-21-brainstuff-nobel-prize.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-21-brainstuff-nobel-prize.mp3' length='1202143' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, nobel prizes, alfred nobel, dynamite, nobel foundation, six nobel prizes</itunes:keywords>
            <itunes:duration>00:01:55</itunes:duration>
            <itunes:subtitle>Nobel Prizes are highly prestigious, valuable awards that have been given out to visionaries and pioneers in select fields since 1901. Tune in to find out more about the Nobel Prize in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a fiber optic cable work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-18-brainstuff-fiber-optic.mp3</link>
            <description>Fiber optic cables make long-distance telephone communication and Internet access much more affordable and accesible. Get Marshall's explanation of fiber optic cables in this episode of BrainStuff.</description>
            <pubDate>Fri, 18 Dec 2009 11:56:54 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-18-brainstuff-fiber-optic.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-18-brainstuff-fiber-optic.mp3' length='2383661' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, fiber topic cable, fiber optic glass, fiber optic laser</itunes:keywords>
            <itunes:duration>00:03:54</itunes:duration>
            <itunes:subtitle>Fiber optic cables make long-distance telephone communication and Internet access much more affordable and accesible. Get Marshall's explanation of fiber optic cables in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What makes glass transparent?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-16-brainstuff-glass.mp3</link>
            <description>The transparency of materials has to do with their molecular state. Discover how silica and heat produce the transparent material we call glass in this episode of BrainStuff.</description>
            <pubDate>Wed, 16 Dec 2009 12:56:23 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-16-brainstuff-glass.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-16-brainstuff-glass.mp3' length='2167890' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, why is glass transparent?, quenching, molecular state, glass, polymers</itunes:keywords>
            <itunes:duration>00:03:32</itunes:duration>
            <itunes:subtitle>The transparency of materials has to do with their molecular state. Discover how silica and heat produce the transparent material we call glass in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do most cars use gasoline instead of diesel?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-14-brainstuff-diesel.mp3</link>
            <description>Diesel engines are more efficient than engines that run on gasoline, yet they've never really caught on in passenger cars in the United States. Discover the many reasons why diesel engines aren't the norm in this episode of BrainStuff.</description>
            <pubDate>Mon, 14 Dec 2009 12:10:32 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-14-brainstuff-diesel.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-14-brainstuff-diesel.mp3' length='2126094' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, diesel engines disadvantages, diesel vs gasoline engines, diesel cars</itunes:keywords>
            <itunes:duration>00:03:28</itunes:duration>
            <itunes:subtitle>Diesel engines are more efficient than engines that run on gasoline, yet they've never really caught on in passenger cars in the United States. Discover the many reasons why diesel engines aren't the norm in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is dynamite? How does it work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-11-brainstuff-dynamite.mp3</link>
            <description>Dynamite is a type of chemical explosive. Discover how explosives from gasoline to dynamite work in this episode of BrainStuff.</description>
            <pubDate>Fri, 11 Dec 2009 10:03:38 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-11-brainstuff-dynamite.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-11-brainstuff-dynamite.mp3' length='1482437' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, dynamite, chemical explosive, gasoline explosive, oxygen, blasting cap, nitroglycerin</itunes:keywords>
            <itunes:duration>00:02:23</itunes:duration>
            <itunes:subtitle>Dynamite is a type of chemical explosive. Discover how explosives from gasoline to dynamite work in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do cats purr?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-09-brainstuff-cat-purr.mp3</link>
            <description>Cats tend to purr when they're happy, but pleasure isn't the only reason for this behavior. And they aren't the only animals who purr. Find out why and how cats and other animals purr in this episode of BrainStuff.</description>
            <pubDate>Wed, 09 Dec 2009 10:30:29 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-09-brainstuff-cat-purr.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-09-brainstuff-cat-purr.mp3' length='1244461' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, why do cats purr, do raccoons purr, big cats purr</itunes:keywords>
            <itunes:duration>00:02:00</itunes:duration>
            <itunes:subtitle>Cats tend to purr when they're happy, but pleasure isn't the only reason for this behavior. And they aren't the only animals who purr. Find out why and how cats and other animals purr in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a rice krispy?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-07-brainstuff-rice-krispy.mp3</link>
            <description>Like many cereals, rice krispies are made by puffing grains -- in this case, rice. Find out how rice crispies and other puffed cereals are manufactured in this episode of BrainStuff.</description>
            <pubDate>Mon, 07 Dec 2009 11:15:38 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-07-brainstuff-rice-krispy.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-07-brainstuff-rice-krispy.mp3' length='1751498' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, rice krispy, puffed cereals, puffing, rice crispies, cereal</itunes:keywords>
            <itunes:duration>00:02:50</itunes:duration>
            <itunes:subtitle>Like many cereals, rice krispies are made by puffing grains -- in this case, rice. Find out how rice crispies and other puffed cereals are manufactured in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do batteries die but then come back to life?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-04-brainstuff-dead-battery.mp3</link>
            <description>Batteries, particularly car batteries, seem to go dead and then come back to life after a resting period. How does this self-recharging feature of batteries work? Find out in this episode of BrainStuff.</description>
            <pubDate>Fri, 04 Dec 2009 12:06:45 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-04-brainstuff-dead-battery.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-04-brainstuff-dead-battery.mp3' length='1811057' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, batteries die then come back to life, self-recharging batteries</itunes:keywords>
            <itunes:duration>00:02:56</itunes:duration>
            <itunes:subtitle>Batteries, particularly car batteries, seem to go dead and then come back to life after a resting period. How does this self-recharging feature of batteries work? Find out in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do artificial flavors work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-02-brainstuff-artificial-flavors.mp3</link>
            <description>Artificial flavors imitate natural flavors and are found in many processed products. Learn more about the chemistry of flavors, both natural and artificial, in this episode of BrainStuff.</description>
            <pubDate>Wed, 02 Dec 2009 11:25:59 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-02-brainstuff-artificial-flavors.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-12-02-brainstuff-artificial-flavors.mp3' length='1750976' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, artificial flavors, volatile chemical, esters, taste, smell, natural flavors</itunes:keywords>
            <itunes:duration>00:02:50</itunes:duration>
            <itunes:subtitle>Artificial flavors imitate natural flavors and are found in many processed products. Learn more about the chemistry of flavors, both natural and artificial, in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is there any way to see satellites that are in orbit?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-30-brainstuff-see-satellite.mp3</link>
            <description>There are hundreds of satellites orbiting the Earth, but it's not always easy to see them. Get Marshall's tips on how to spot satellites in this episode of BrainStuff.</description>
            <pubDate>Mon, 30 Nov 2009 11:48:25 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-30-brainstuff-see-satellite.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-30-brainstuff-see-satellite.mp3' length='1150682' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, satellite, geosynchronous orbit, asynchronous orbit, see satellite in the sky</itunes:keywords>
            <itunes:duration>00:01:50</itunes:duration>
            <itunes:subtitle>There are hundreds of satellites orbiting the Earth, but it's not always easy to see them. Get Marshall's tips on how to spot satellites in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why can't we breathe underwater?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-27-brainstuff-water-oxygen.mp3</link>
            <description>Water is made up of hydrogen and oxygen, so why aren't we able to breathe underwater? Find out in this episode of BrainStuff.</description>
            <pubDate>Fri, 27 Nov 2009 18:13:12 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-27-brainstuff-water-oxygen.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-27-brainstuff-water-oxygen.mp3' length='1983204' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, water, hydrogen, oxygen, why can't we breathe underwater, H20</itunes:keywords>
            <itunes:duration>00:03:14</itunes:duration>
            <itunes:subtitle>Water is made up of hydrogen and oxygen, so why aren't we able to breathe underwater? Find out in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is leather and where does it come from?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-25-brainstuff-leather.mp3</link>
            <description>Most leather is made from processed cattle skin, although synthetic and other varieties exist. Learn more about leather in this episode of BrainStuff.</description>
            <pubDate>Wed, 25 Nov 2009 11:19:50 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-25-brainstuff-leather.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-25-brainstuff-leather.mp3' length='3281229' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, leather, cow skin, rawhide, tanning, chromium, tannins, synthetic leather</itunes:keywords>
            <itunes:duration>00:05:23</itunes:duration>
            <itunes:subtitle>Most leather is made from processed cattle skin, although synthetic and other varieties exist. Learn more about leather in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do satellites orbit the earth?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-23-brainstuff-orbit.mp3</link>
            <description>In this episode of BrainStuff, Marshall explains the physics behind satellites and orbits.</description>
            <pubDate>Mon, 23 Nov 2009 10:38:01 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-23-brainstuff-orbit.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-23-brainstuff-orbit.mp3' length='2128445' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, satellites orbit earth, orbit, free fall, curvature of the earth</itunes:keywords>
            <itunes:duration>00:03:28</itunes:duration>
            <itunes:subtitle>In this episode of BrainStuff, Marshall explains the physics behind satellites and orbits.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can you measure the height of a tall tower?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-20-brainstuff-height-of-tower.mp3</link>
            <description>In this episode of BrainStuff, Marshall reveals three common techniques for measuring the height of tall objects like towers.</description>
            <pubDate>Fri, 20 Nov 2009 11:08:28 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-20-brainstuff-height-of-tower.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-20-brainstuff-height-of-tower.mp3' length='1826731' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, height of tower, how to measure tall objects, broomstick, protractor</itunes:keywords>
            <itunes:duration>00:02:58</itunes:duration>
            <itunes:subtitle>In this episode of BrainStuff, Marshall reveals three common techniques for measuring the height of tall objects like towers.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does the lighter in a barbeque grill work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-18-brainstuff-piezoelectric.mp3</link>
            <description>A barbeque grill has a push-button lighter that relies on piezoelectricity to generate a spark. Learn more about how piezoelectricity works -- and the kinds of devices that use piezoelectric materials -- in this episode of BrainStuff.</description>
            <pubDate>Wed, 18 Nov 2009 12:05:50 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-18-brainstuff-piezoelectric.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-18-brainstuff-piezoelectric.mp3' length='1768478' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuf, lighter bbq grill, piezoelectricity, piezoelectric, spark, push-button lighter</itunes:keywords>
            <itunes:duration>00:02:52</itunes:duration>
            <itunes:subtitle>A barbeque grill has a push-button lighter that relies on piezoelectricity to generate a spark. Learn more about how piezoelectricity works -- and the kinds of devices that use piezoelectric materials -- in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a magneto work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-16-brainstuff-magneto.mp3</link>
            <description>A magneto is a kind of electrical generator used in small gasoline engines in lieu of a battery. Find out how magnetos work in this episode of BrainStuff.</description>
            <pubDate>Mon, 16 Nov 2009 14:11:27 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-16-brainstuff-magneto.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-16-brainstuff-magneto.mp3' length='2341343' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, magneto, generator, ignition, spark plug, electrical generator, electromagnet, armature</itunes:keywords>
            <itunes:duration>00:03:49</itunes:duration>
            <itunes:subtitle>A magneto is a kind of electrical generator used in small gasoline engines in lieu of a battery. Find out how magnetos work in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do tools have &quot;drop forged&quot; stamped on them?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-13-brainstuff-drop-forge.mp3</link>
            <description>Tools that say &quot;drop forged&quot; have been created using a technique called drop forging. Find out how drop forging and several other kinds of forging work, and why drop forging is a sign of a sturdy tool, in this episode of BrainStuff.</description>
            <pubDate>Fri, 13 Nov 2009 11:09:40 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-13-brainstuff-drop-forge.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-13-brainstuff-drop-forge.mp3' length='1641261' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, drop forging, press forging, roll forging, cold forging, dies, forge</itunes:keywords>
            <itunes:duration>00:02:39</itunes:duration>
            <itunes:subtitle>Tools that say &quot;drop forged&quot; have been created using a technique called drop forging. Find out how drop forging and several other kinds of forging work, and why drop forging is a sign of a sturdy tool, in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a T1 line and how does it work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-11-brainstuff-t1-line.mp3</link>
            <description>A T1 line is a dedicated fiber optic or copper cable that provides businesses with far more digital data than a residential line. Discover how T1 and other kinds of fiber optic lines work in this episode of BrainStuff.</description>
            <pubDate>Wed, 11 Nov 2009 12:29:15 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-11-brainstuff-t1-line.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-11-brainstuff-t1-line.mp3' length='1946894' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, t1 line, t1 phone line, fiber optic line, digital, analog</itunes:keywords>
            <itunes:duration>00:03:10</itunes:duration>
            <itunes:subtitle>A T1 line is a dedicated fiber optic or copper cable that provides businesses with far more digital data than a residential line. Discover how T1 and other kinds of fiber optic lines work in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a jet engine's afterburner work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-09-brainstuff-afterburner.mp3</link>
            <description>The afterburner on a jet engine adds thrust to the engine. Tune in as Marshall Brain explains how an afterburner works -- and the pros and cons of using one -- in this episode of BrainStuff.</description>
            <pubDate>Mon, 09 Nov 2009 10:51:38 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-09-brainstuff-afterburner.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-09-brainstuff-afterburner.mp3' length='1593980' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, afterburner, jet engine, fuel injector, turbine, thrust, jet engine afterburner</itunes:keywords>
            <itunes:duration>00:02:35</itunes:duration>
            <itunes:subtitle>The afterburner on a jet engine adds thrust to the engine. Tune in as Marshall Brain explains how an afterburner works -- and the pros and cons of using one -- in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does the public option work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-06-brainstuff-public-option.mp3</link>
            <description>In the current U.S. debate over health care reform, a government-sponsored public option has been a controversial topic. Tune in to this episode of BrainStuff to hear Marshall Brain explain the nuances and implications of the public option.</description>
            <pubDate>Fri, 06 Nov 2009 10:10:16 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-06-brainstuff-public-option.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-06-brainstuff-public-option.mp3' length='3047694' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, public option, health care reform, single payer system</itunes:keywords>
            <itunes:duration>00:05:00</itunes:duration>
            <itunes:subtitle>In the current U.S. debate over health care reform, a government-sponsored public option has been a controversial topic. Tune in to this episode of BrainStuff to hear Marshall Brain explain the nuances and implications of the public option.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do they add iodine to salt?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-04-brainstuff-iodine.mp3</link>
            <description>Table salt contains iodine to help prevent thyroid problems and iodine deficiencies. Find out how table salt keeps your thyroid happy -- and what iodine has to do with a nuclear attack -- in this episode of BrainStuff.</description>
            <pubDate>Wed, 04 Nov 2009 10:57:06 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-04-brainstuff-iodine.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-04-brainstuff-iodine.mp3' length='1774486' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, iodine table salt, iodine, thyroid gland, goiter, iodine pills</itunes:keywords>
            <itunes:duration>00:02:53</itunes:duration>
            <itunes:subtitle>Table salt contains iodine to help prevent thyroid problems and iodine deficiencies. Find out how table salt keeps your thyroid happy -- and what iodine has to do with a nuclear attack -- in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How much sugar do they really put in soda?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-02-brainstuff-sugar-in-soda.mp3</link>
            <description>Sodas and soft drinks contain a surprising amount of sugar -- more than you might expect. Tune in as Marshall Brain reveals how much sugar is in soda in this episode of BrainStuff.</description>
            <pubDate>Mon, 02 Nov 2009 13:26:29 -0500</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-02-brainstuff-sugar-in-soda.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-11-02-brainstuff-sugar-in-soda.mp3' length='1522143' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, sugar in soda, sugar in soft drinks, teaspoons, sugar</itunes:keywords>
            <itunes:duration>00:02:27</itunes:duration>
            <itunes:subtitle>Sodas and soft drinks contain a surprising amount of sugar -- more than you might expect. Tune in as Marshall Brain reveals how much sugar is in soda in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do you add a USB device if you've run out of ports?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-30-brainstuff-usb-hubs.mp3</link>
            <description>Desktop computers and laptops only have so many USB ports, so what do you do when you want to plug in more USB devices and they're all full? You buy a USB hub. Find out how these hubs work, and which kind you should get, in this episode of BrainStuff.</description>
            <pubDate>Fri, 30 Oct 2009 10:55:47 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-30-brainstuff-usb-hubs.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-30-brainstuff-usb-hubs.mp3' length='1524233' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, usb hubs, powered usb hub, unpowered usb hub, usb ports</itunes:keywords>
            <itunes:duration>00:02:28</itunes:duration>
            <itunes:subtitle>Desktop computers and laptops only have so many USB ports, so what do you do when you want to plug in more USB devices and they're all full? You buy a USB hub. Find out how these hubs work, and which kind you should get, in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do they make fortune cookies?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-28-brainstuff-fortune-cookies.mp3</link>
            <description>You've probably had countless fortune cookies after Chinese meals, but have you ever wondered how they're made? Discover the &quot;food technology&quot; behind those prescient little cookies in this episode of BrainStuff.</description>
            <pubDate>Wed, 28 Oct 2009 10:35:17 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-28-brainstuff-fortune-cookies.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-28-brainstuff-fortune-cookies.mp3' length='1465980' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, fortune cookies, food technology, hard shells</itunes:keywords>
            <itunes:duration>00:02:22</itunes:duration>
            <itunes:subtitle>You've probably had countless fortune cookies after Chinese meals, but have you ever wondered how they're made? Discover the &quot;food technology&quot; behind those prescient little cookies in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do they measure sea level?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-26-brainstuff-sea-level.mp3</link>
            <description>Sea level is an important measurement, but it's also a complicated one. Find out why in this episode of BrainStuff.</description>
            <pubDate>Mon, 26 Oct 2009 10:14:14 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-26-brainstuff-sea-level.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-26-brainstuff-sea-level.mp3' length='2456804' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, sea level, tides, tide gauge, geoid, stilling well</itunes:keywords>
            <itunes:duration>00:04:01</itunes:duration>
            <itunes:subtitle>Sea level is an important measurement, but it's also a complicated one. Find out why in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why does lettuce stored in a bag stay fresh longer?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-23-brainstuff-map.mp3</link>
            <description>Many foods you'll find at the grocery store, like lettuce, for example, are stored in special plastic packaging called MAP that helps them stay fresh longer. Find out what MAP is -- and how it keeps food fresh longer -- in this episode of BrainStuff.</description>
            <pubDate>Fri, 23 Oct 2009 11:53:11 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-23-brainstuff-map.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-23-brainstuff-map.mp3' length='1467808' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, MAP, modified atmosphere packaging, oxygen, CO2, shelf life, gases</itunes:keywords>
            <itunes:duration>00:02:22</itunes:duration>
            <itunes:subtitle>Many foods you'll find at the grocery store, like lettuce, for example, are stored in special plastic packaging called MAP that helps them stay fresh longer. Find out what MAP is -- and how it keeps food fresh longer -- in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do herbicides like Roundup work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-21-brainstuff-roundup.mp3</link>
            <description>Herbicides like Roundup are products that inhibit plant and weed growth in a very specific way. Explore the biochemistry behind glyphosphate-based herbicides in this episode of HowStuffWorks.com.</description>
            <pubDate>Wed, 21 Oct 2009 11:07:06 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-21-brainstuff-roundup.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-21-brainstuff-roundup.mp3' length='1505164' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, herbicides, Roundup, glyphosphate, weed killers, enzyme, EPSP synthase</itunes:keywords>
            <itunes:duration>00:02:26</itunes:duration>
            <itunes:subtitle>Herbicides like Roundup are products that inhibit plant and weed growth in a very specific way. Explore the biochemistry behind glyphosphate-based herbicides in this episode of HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What's the most efficient way to mow your yard?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-19-brainstuff-lawn-efficiency.mp3</link>
            <description>There's more than one way to mow a yard, but which is the most efficient? Tune in to this episode of BrainStuff to find out.</description>
            <pubDate>Mon, 19 Oct 2009 10:00:31 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-19-brainstuff-lawn-efficiency.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-19-brainstuff-lawn-efficiency.mp3' length='1751759' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, lawn efficiency, spiral mowing pattern, mowing</itunes:keywords>
            <itunes:duration>00:02:50</itunes:duration>
            <itunes:subtitle>There's more than one way to mow a yard, but which is the most efficient? Tune in to this episode of BrainStuff to find out.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Does airing out mattresses outside do any good?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-16-brainstuff-mattress-disinfect.mp3</link>
            <description>Airing out rugs and mattresses outdoors is a great way to disinfect them, thanks to a little thing called ultraviolet light. Find out how UV light can disinfect everything from rugs to water in this episode of BrainStuff.</description>
            <pubDate>Fri, 16 Oct 2009 10:26:41 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-16-brainstuff-mattress-disinfect.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-16-brainstuff-mattress-disinfect.mp3' length='1302192' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, air out mattress outside, ultraviolet light disinfectant, uv light</itunes:keywords>
            <itunes:duration>00:02:05</itunes:duration>
            <itunes:subtitle>Airing out rugs and mattresses outdoors is a great way to disinfect them, thanks to a little thing called ultraviolet light. Find out how UV light can disinfect everything from rugs to water in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is the problem with MTBE in gasoline?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-14-brainstuff-mtbe.mp3</link>
            <description>Some gasoline contains MTBE, or methyl tertiary butyl ether. Find out why MTBE is added to gasoline in the first place, and why it's no longer a popular additive, in this episode of BrainStuff.</description>
            <pubDate>Wed, 14 Oct 2009 09:59:14 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-14-brainstuff-mtbe.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-14-brainstuff-mtbe.mp3' length='1433327' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, MTBE, methyl tertiary butyl ether, gasoline, mtbe carcinogenic, ethanol</itunes:keywords>
            <itunes:duration>00:02:19</itunes:duration>
            <itunes:subtitle>Some gasoline contains MTBE, or methyl tertiary butyl ether. Find out why MTBE is added to gasoline in the first place, and why it's no longer a popular additive, in this episode of BrainStuff.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does an EPIRB distress radio work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-12-brainstuff-epirb.mp3</link>
            <description>An EPIRB, or Emergency Position Indicating Radio Beacon, helps rescuers find people -- mostly boaters -- in emergency situations. Tune in to find out how EPIRB radios work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 12 Oct 2009 10:18:35 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-12-brainstuff-epirb.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-12-brainstuff-epirb.mp3' length='1516919' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, EPIRB, emergency position indicating radio beacon, GPS, radio transmitter, satellite</itunes:keywords>
            <itunes:duration>00:02:27</itunes:duration>
            <itunes:subtitle>An EPIRB, or Emergency Position Indicating Radio Beacon, helps rescuers find people -- mostly boaters -- in emergency situations. Tune in to find out how EPIRB radios work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is chocolate poisonous to dogs?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-09-brainstuff-chocolate-poisoning.mp3</link>
            <description>Under the right conditions, chocolate can indeed be deadly for dogs. Tune in to learn more about the compound in chocolate that makes it dangerous for dogs -- and how much is too much -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 09 Oct 2009 10:50:22 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-09-brainstuff-chocolate-poisoning.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-09-brainstuff-chocolate-poisoning.mp3' length='1453985' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, theobromine, chocolate dogs poisonous, is chocolate poisonous to dogs?</itunes:keywords>
            <itunes:duration>00:02:21</itunes:duration>
            <itunes:subtitle>Under the right conditions, chocolate can indeed be deadly for dogs. Tune in to learn more about the compound in chocolate that makes it dangerous for dogs -- and how much is too much -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can there be seedless grapes?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-07-brainstuff-seedless-grapes.mp3</link>
            <description>Seedless grapes are the most common kind on the market, but have you ever wondered how a grape can be seedless? How does it grow? Discover how seedless grapes accidentally came about -- and how they grow -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 07 Oct 2009 11:17:44 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-07-brainstuff-seedless-grapes.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-07-brainstuff-seedless-grapes.mp3' length='1159825' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, seedless grapes, grape vine cuttings, white Thompson's seedless grapes</itunes:keywords>
            <itunes:duration>00:01:51</itunes:duration>
            <itunes:subtitle>Seedless grapes are the most common kind on the market, but have you ever wondered how a grape can be seedless? How does it grow? Discover how seedless grapes accidentally came about -- and how they grow -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do dry chemical fire extinguishers work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-05-brainstuff-fire-extinguisher.mp3</link>
            <description>Three elements create a fire. Discover what they are and how dry chemical fire extinguishers combat them in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 05 Oct 2009 11:26:09 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-05-brainstuff-fire-extinguisher.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-05-brainstuff-fire-extinguisher.mp3' length='1875841' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, carbon dioxide fire extinguisher, dry chemical fire extinguisher, baking soda</itunes:keywords>
            <itunes:duration>00:03:03</itunes:duration>
            <itunes:subtitle>Three elements create a fire. Discover what they are and how dry chemical fire extinguishers combat them in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What does Pez mean?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-02-brainstuff-pez.mp3</link>
            <description>Today, Pez candy dispensers are a sweet treat for children and a novelty for adults. Originally, however, they were created to help adults quit smoking. Learn more about the fascinating history of Pez in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 02 Oct 2009 10:27:11 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-02-brainstuff-pez.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-10-02-brainstuff-pez.mp3' length='1962829' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, Pez, Pez smokers, Eduard Haas III, Pez candy, Pez peppermint</itunes:keywords>
            <itunes:duration>00:03:11</itunes:duration>
            <itunes:subtitle>Today, Pez candy dispensers are a sweet treat for children and a novelty for adults. Originally, however, they were created to help adults quit smoking. Learn more about the fascinating history of Pez in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What does tear gas do?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-30-brainstuff-tear-gas.mp3</link>
            <description>You've probably heard of tear gas before, but did you know that Mace is a form of it? Learn more about the three commonly used types of tear gas -- how they work and what they're used for -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 30 Sep 2009 11:26:17 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-30-brainstuff-tear-gas.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-30-brainstuff-tear-gas.mp3' length='1175759' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, tear gas, CN, mace, CS, pepper spray, tear gas crowd control</itunes:keywords>
            <itunes:duration>00:01:53</itunes:duration>
            <itunes:subtitle>You've probably heard of tear gas before, but did you know that Mace is a form of it? Learn more about the three commonly used types of tear gas -- how they work and what they're used for -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What are carbide tips?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-28-brainstuff-carbide-tips.mp3</link>
            <description>Many cutting tools are made of materials like steel but have carbide tips, which stay sharper longer. Learn more about carbide tips in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 28 Sep 2009 11:47:08 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-28-brainstuff-carbide-tips.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-28-brainstuff-carbide-tips.mp3' length='1456315' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, carbide tips, tungsten carbide, carbide tipped, drillbit, saw blades</itunes:keywords>
            <itunes:duration>00:02:21</itunes:duration>
            <itunes:subtitle>Many cutting tools are made of materials like steel but have carbide tips, which stay sharper longer. Learn more about carbide tips in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do I burn calories on a stair machine?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-25-brainstuff-stair-machine.mp3</link>
            <description>If you've ever sweated your way through a work-out on a stair machine, you know that calories are definitely being burned in the process. But how? Learn more about foot-pounds, horsepower and stair machines in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 25 Sep 2009 10:19:15 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-25-brainstuff-stair-machine.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-25-brainstuff-stair-machine.mp3' length='1785196' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, stair machine, burn calories stair machine, horsepower, foot-pounds</itunes:keywords>
            <itunes:duration>00:02:54</itunes:duration>
            <itunes:subtitle>If you've ever sweated your way through a work-out on a stair machine, you know that calories are definitely being burned in the process. But how? Learn more about foot-pounds, horsepower and stair machines in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is a circular saw louder than a table saw?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-23-brainstuff-saw-noise.mp3</link>
            <description>Circular saws are much noisier than table saws partly because of the type of motor they possess. Learn more about universal and induction motors in BrainStuff, a podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 23 Sep 2009 10:32:58 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-23-brainstuff-saw-noise.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-23-brainstuff-saw-noise.mp3' length='1517441' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, circular saw, table saw, induction motor, universal motor, AC, DC</itunes:keywords>
            <itunes:duration>00:02:27</itunes:duration>
            <itunes:subtitle>Circular saws are much noisier than table saws partly because of the type of motor they possess. Learn more about universal and induction motors in BrainStuff, a podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do some engines use a dry sump oil system?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-21-brainstuff-dry-sump.mp3</link>
            <description>Most car engines use a wet sump oil system, but some rely on a dry sump system. Find out how a dry sump system works -- and why it's advantageous -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 21 Sep 2009 10:18:22 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-21-brainstuff-dry-sump.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-21-brainstuff-dry-sump.mp3' length='1630029' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, dry sump oil system, wet sump oil system, engine</itunes:keywords>
            <itunes:duration>00:02:38</itunes:duration>
            <itunes:subtitle>Most car engines use a wet sump oil system, but some rely on a dry sump system. Find out how a dry sump system works -- and why it's advantageous -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is low-power FM (LPFM)?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-18-brainstuff-lpfm-stations.mp3</link>
            <description>FM radio stations have high operating costs, so they're seldom affordable to individuals and small organizations that want to use them for not-for-profit purposes. Find out how LPFM stations work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 18 Sep 2009 10:37:41 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/hss/2009-09-17-hss-high-speed-trains.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-18-brainstuff-lpfm-stations.mp3' length='1731656' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, low power fm, LPFM, lpfm stations, FCC, watts, fm stations</itunes:keywords>
            <itunes:duration>00:02:48</itunes:duration>
            <itunes:subtitle>FM radio stations have high operating costs, so they're seldom affordable to individuals and small organizations that want to use them for not-for-profit purposes. Find out how LPFM stations work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How much does 20-pound bond paper weigh?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-16-brainstuff-20-pound-bond-paper.mp3</link>
            <description>Your average ream of printer paper is called 20-pound bond paper, but it doesn't actually weigh 20 pounds. Tune in as Marshall explains this strange American paper naming system -- and its metric alternative -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 16 Sep 2009 10:33:10 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-16-brainstuff-20-pound-bond-paper.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-16-brainstuff-20-pound-bond-paper.mp3' length='1614355' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, 20-pound bond paper, reams, printer paper, metric system</itunes:keywords>
            <itunes:duration>00:02:37</itunes:duration>
            <itunes:subtitle>Your average ream of printer paper is called 20-pound bond paper, but it doesn't actually weigh 20 pounds. Tune in as Marshall explains this strange American paper naming system -- and its metric alternative -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Should you turn your computer off when it's not in use?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-14-brainstuff-turn-computer-off.mp3</link>
            <description>When it comes to the question of whether or not you should turn off your computer when you're not using it, there's no simple answer. Tune in to get Marshall's thorough take on the topic in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 14 Sep 2009 13:34:49 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-14-brainstuff-turn-computer-off.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-14-brainstuff-turn-computer-off.mp3' length='2032315' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, turn off computer, server, leave computer on, wasted energy</itunes:keywords>
            <itunes:duration>00:03:18</itunes:duration>
            <itunes:subtitle>When it comes to the question of whether or not you should turn off your computer when you're not using it, there's no simple answer. Tune in to get Marshall's thorough take on the topic in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What do those diamond-shaped signs on buildings mean?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-11-brainstuff-nfa-panel.mp3</link>
            <description>The National Fire Protection Agency, or NFPA, uses these signs to indicate hazardous materials stored in an unknown building. Listen in to learn how the signs work -- and how they help firefighters -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 11 Sep 2009 12:34:55 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-11-brainstuff-nfa-panel.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-11-brainstuff-nfa-panel.mp3' length='2002274' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, nfpa panel, national fire protection agency</itunes:keywords>
            <itunes:duration>00:03:16</itunes:duration>
            <itunes:subtitle>The National Fire Protection Agency, or NFPA, uses these signs to indicate hazardous materials stored in an unknown building. Listen in to learn how the signs work -- and how they help firefighters -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is an Omega-3 fatty acid?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-09-brainstuff-omega-3.mp3</link>
            <description>Omega-3 fatty acids are essential to the human body. Tune in to hear Marshall Brain explain the chemistry of fat molecules and fatty acids, Omega-3s in particular, in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 09 Sep 2009 13:49:21 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-09-brainstuff-omega-3.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-09-brainstuff-omega-3.mp3' length='3721067' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, Omega-3 fatty acid, triglycerides, saturated fat, unsaturated fat, monounsaturated, polyunsaturated</itunes:keywords>
            <itunes:duration>00:06:07</itunes:duration>
            <itunes:subtitle>Omega-3 fatty acids are essential to the human body. Tune in to hear Marshall Brain explain the chemistry of fat molecules and fatty acids, Omega-3s in particular, in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What gives a Harley its distinctive sound?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-07-brainstuff-harley-sound.mp3</link>
            <description>A Harley Davidson motorcycle emits a very distintive sound because of the unique way its engine works. Find out more in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 07 Sep 2009 15:51:23 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-07-brainstuff-harley-sound.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-07-brainstuff-harley-sound.mp3' length='2247029' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, Harley Davidson motorcycle, Harley, cylinders, pistons, two cylinder, engine</itunes:keywords>
            <itunes:duration>00:03:03</itunes:duration>
            <itunes:subtitle>A Harley Davidson motorcycle emits a very distintive sound because of the unique way its engine works. Find out more in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is the battery light on your car's dashboard for?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-04-brainstuff-battery-light.mp3</link>
            <description>Cars rely on batteries to keep their electrical parts running and alternators to keep their batteries alive. Battery lights come into play when there's a charging problem. Find out more about battery lights in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 04 Sep 2009 10:41:39 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-04-brainstuff-battery-light.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-04-brainstuff-battery-light.mp3' length='1436659' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, battery light, car, dashboard, alternator, car battery, rechargeable, electrical system</itunes:keywords>
            <itunes:duration>00:02:19</itunes:duration>
            <itunes:subtitle>Cars rely on batteries to keep their electrical parts running and alternators to keep their batteries alive. Battery lights come into play when there's a charging problem. Find out more about battery lights in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does the Radio Data System work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-02-brainstuff-rds.mp3</link>
            <description>The Radio Data System, or RDS, allows your radio to display information like song titles and radio station call signs. Find out how the RDS works in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 02 Sep 2009 11:16:55 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-02-brainstuff-rds.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-09-02-brainstuff-rds.mp3' length='1429344' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, Radio Data System, RDS, frequency, bandwidth, kilohertz</itunes:keywords>
            <itunes:duration>00:02:18</itunes:duration>
            <itunes:subtitle>The Radio Data System, or RDS, allows your radio to display information like song titles and radio station call signs. Find out how the RDS works in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do trick birthday candles work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-31-brainstuff-trick-candle.mp3</link>
            <description>Candles are simple yet ingenious light-producing devices, and it only takes one extra ingredient to turn them into trick candles. Find out how regular and trick candles work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 31 Aug 2009 10:58:35 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-31-brainstuff-trick-candle.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-31-brainstuff-trick-candle.mp3' length='2952283' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, candles, trick candles, wick, paraffin wax, magnesium powder</itunes:keywords>
            <itunes:duration>00:04:50</itunes:duration>
            <itunes:subtitle>Candles are simple yet ingenious light-producing devices, and it only takes one extra ingredient to turn them into trick candles. Find out how regular and trick candles work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What exactly is a blueprint?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-28-brainstuff-blueprints.mp3</link>
            <description>Blueprinting, which has been around since 1842, is a common way to reproduce an architectural drawing. Tune in to learn more about the complex chemical processes that make blueprints blue -- and white -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 28 Aug 2009 10:24:08 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-28-brainstuff-blueprints.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-28-brainstuff-blueprints.mp3' length='1794275' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, blueprints, blueprinting, architecture, diazotype, why are blueprints blue</itunes:keywords>
            <itunes:duration>00:02:55</itunes:duration>
            <itunes:subtitle>Blueprinting, which has been around since 1842, is a common way to reproduce an architectural drawing. Tune in to learn more about the complex chemical processes that make blueprints blue -- and white -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why does your computer need a battery?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-26-brainstuff-computer-battery.mp3</link>
            <description>Computers have a small battery that's important because it keeps the machine's clock running -- and sometimes, your computer. Get the goods on computer batteries in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 26 Aug 2009 12:13:54 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-26-brainstuff-computer-battery.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-26-brainstuff-computer-battery.mp3' length='1652953' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, computer battery, real-time clock chip, quartz clock, RAM, cmos ram</itunes:keywords>
            <itunes:duration>00:02:40</itunes:duration>
            <itunes:subtitle>Computers have a small battery that's important because it keeps the machine's clock running -- and sometimes, your computer. Get the goods on computer batteries in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is carrageenan?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-24-brainstuff-carrageenan.mp3</link>
            <description>Carrageenan is a gum derived from seaweed that helps processed food withstand the rigors of transportation and long waits in warehouses. Learn more about the role that carrageenan plays in food by checking out this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 24 Aug 2009 11:32:27 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-24-brainstuff-carrageenan.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-24-brainstuff-carrageenan.mp3' length='1893540' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, carrageenan, xanthum gum, seaweed, processed food</itunes:keywords>
            <itunes:duration>00:03:05</itunes:duration>
            <itunes:subtitle>Carrageenan is a gum derived from seaweed that helps processed food withstand the rigors of transportation and long waits in warehouses. Learn more about the role that carrageenan plays in food by checking out this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does an airplane toilet work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-21-brainstuff-airplane-toilet.mp3</link>
            <description>Airplane toilets serve the same function as regular ones, but because they exist in a moving environment, they rely on slightly different technology to get the job done. Find out how they work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 21 Aug 2009 10:55:17 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-21-brainstuff-airplane-toilet.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-21-brainstuff-airplane-toilet.mp3' length='1548985' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, airplane toilet, toilet bowl, siphon, vacuum toilets, gravity</itunes:keywords>
            <itunes:duration>00:02:30</itunes:duration>
            <itunes:subtitle>Airplane toilets serve the same function as regular ones, but because they exist in a moving environment, they rely on slightly different technology to get the job done. Find out how they work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do they include jokers in a deck of playing cards?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-19-brainstuff-joker.mp3</link>
            <description>The joker is an obscure and seemingly useless addition to a deck of modern playing card, but originally, it was a powerful card. Discover the history of the joker card -- and how the modern deck took shape -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 19 Aug 2009 10:15:23 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-19-brainstuff-joker.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-19-brainstuff-joker.mp3' length='1114569' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, joker card, playing card origins, Euchre, imperial bower</itunes:keywords>
            <itunes:duration>00:01:47</itunes:duration>
            <itunes:subtitle>The joker is an obscure and seemingly useless addition to a deck of modern playing card, but originally, it was a powerful card. Discover the history of the joker card -- and how the modern deck took shape -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why doesn't the space shuttle burn up upon re-entry?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-17-brainstuff-meteor-re-entry.mp3</link>
            <description>Meteors burn up once they hit Earth's atmosphere, and the space shuttle would do the same if it wasn't protected. Learn more about meteors and the technologies that keep the space shuttle from burning up in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 17 Aug 2009 13:09:07 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-17-brainstuff-meteor-re-entry.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-17-brainstuff-meteor-re-entry.mp3' length='1430389' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, meteor, re-entry, space shuttle, ablative technology, insulating tile technology</itunes:keywords>
            <itunes:duration>00:02:18</itunes:duration>
            <itunes:subtitle>Meteors burn up once they hit Earth's atmosphere, and the space shuttle would do the same if it wasn't protected. Learn more about meteors and the technologies that keep the space shuttle from burning up in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What causes high tide and low tide?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-14-brainstuff-tides.mp3</link>
            <description>The moon's gravitational pull is strong enough to affect the oceans on Earth, resulting in low and high tides. Discover exactly how high and low tides work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 14 Aug 2009 09:19:00 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-14-brainstuff-tides.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-14-brainstuff-tides.mp3' length='1140953' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, tides, moon high tide, moon low tide, gravitational force, Earth</itunes:keywords>
            <itunes:duration>00:01:49</itunes:duration>
            <itunes:subtitle>The moon's gravitational pull is strong enough to affect the oceans on Earth, resulting in low and high tides. Discover exactly how high and low tides work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does the common cold work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-12-brainstuff-common-cold.mp3</link>
            <description>We've all had a cold at one point or another; it entails an uncomfortable cocktail of symptoms like sneezing, coughing and a runny nose. But why do we get colds? How do they work? Find out in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 12 Aug 2009 10:10:43 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-12-brainstuff-common-cold.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-12-brainstuff-common-cold.mp3' length='1820397' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, common cold, coughing, sneezing, runny nose, rhino virus, immune system</itunes:keywords>
            <itunes:duration>00:02:28</itunes:duration>
            <itunes:subtitle>We've all had a cold at one point or another; it entails an uncomfortable cocktail of symptoms like sneezing, coughing and a runny nose. But why do we get colds? How do they work? Find out in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What are other ways to store energy besides batteries?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-10-brainstuff-storing-energy.mp3</link>
            <description>Batteries are a common way to store energy, but there are many others. Discover more energy storage techniques, from falling weights to fuel cells, in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 10 Aug 2009 10:29:02 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-10-brainstuff-storing-energy.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-10-brainstuff-storing-energy.mp3' length='2679826' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, storing energy, batteries, falling weight, fuel cells, antimatter</itunes:keywords>
            <itunes:duration>00:04:23</itunes:duration>
            <itunes:subtitle>Batteries are a common way to store energy, but there are many others. Discover more energy storage techniques, from falling weights to fuel cells, in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is the Nissan Leaf such a big deal?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-07-brainstuff-nissan-leaf.mp3</link>
            <description>Nissan recently released the Leaf, a model which may be the first viable electric car to come on the market. How does it work? Why do people have high hopes for it? Tune in to this podcast from HowStuffWorks.com to find out more about the Nissan Leaf.</description>
            <pubDate>Fri, 07 Aug 2009 15:26:27 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-07-brainstuff-nissan-leaf.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-07-brainstuff-nissan-leaf.mp3' length='3407075' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, Nissan Leaf, electric car, lithium ion battery, recharging stations</itunes:keywords>
            <itunes:duration>00:05:36</itunes:duration>
            <itunes:subtitle>Nissan recently released the Leaf, a model which may be the first viable electric car to come on the market. How does it work? Why do people have high hopes for it? Tune in to this podcast from HowStuffWorks.com to find out more about the Nissan Leaf.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a traffic light detect cars?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-05-brainstuff-traffic-light.mp3</link>
            <description>Traffic lights detect vehicles using a variety of methods. Check out this podcast from HowStuffWorks.com to find out how timers, inductive loops and other detectors keep traffic running smoothly.</description>
            <pubDate>Wed, 05 Aug 2009 10:09:51 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-05-brainstuff-traffic-light.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-05-brainstuff-traffic-light.mp3' length='2070651' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, traffic light, car, timers, motion, weight, inductive loop, detectors, detect</itunes:keywords>
            <itunes:duration>00:03:22</itunes:duration>
            <itunes:subtitle>Traffic lights detect vehicles using a variety of methods. Check out this podcast from HowStuffWorks.com to find out how timers, inductive loops and other detectors keep traffic running smoothly.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do freezing temperatures yield both snow and rain?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-03-brainstuff-freezing-rain.mp3</link>
            <description>When the temperature dips below freezing, precipitation often turns into snow, but sometimes you'll get freezing rain or sleet. Why? Find out in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 03 Aug 2009 15:18:03 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-03-brainstuff-freezing-rain.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-08-03-brainstuff-freezing-rain.mp3' length='1441622' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, 30 degrees Fahrenheit, freezing temperatures, precipitation, freezing rain, sleet</itunes:keywords>
            <itunes:duration>00:02:19</itunes:duration>
            <itunes:subtitle>When the temperature dips below freezing, precipitation often turns into snow, but sometimes you'll get freezing rain or sleet. Why? Find out in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How long before sharks start going extinct?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-31-brainstuff-shark.mp3</link>
            <description>Sharks are ancient, fierce creatures, but they're also in danger of extinction on many fronts. Discover all the factors that make sharks vulnerable -- and what you can do to help -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 31 Jul 2009 10:30:25 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-31-brainstuff-shark.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-31-brainstuff-shark.mp3' length='2175402' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, sharks go extinct, shark extinction,</itunes:keywords>
            <itunes:duration>00:03:33</itunes:duration>
            <itunes:subtitle>Sharks are ancient, fierce creatures, but they're also in danger of extinction on many fronts. Discover all the factors that make sharks vulnerable -- and what you can do to help -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can some eggs be better for you than others?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-29-brainstuff-special-eggs.mp3</link>
            <description>If you've been to the grocery store recently, you know that eggs come in many varieties, some claiming to be better for you than others. What differentiates a normal egg from a &quot;special&quot; one? Find out in this podcast from HowStuffWorks.com.</description>
            <pubDate>Thu, 30 Jul 2009 15:11:19 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-29-brainstuff-special-eggs.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-29-brainstuff-special-eggs.mp3' length='1466438' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, special eggs, egg patents, organic eggs, healthy eggs</itunes:keywords>
            <itunes:duration>00:02:22</itunes:duration>
            <itunes:subtitle>If you've been to the grocery store recently, you know that eggs come in many varieties, some claiming to be better for you than others. What differentiates a normal egg from a &quot;special&quot; one? Find out in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does catnip work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-27-brainstuff-catnip.mp3</link>
            <description>You've probably heard that catnip drives felines wild, but did you know that it's a plant related to mint? And that it doesn't affect all cats? Find out how catnip works in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 27 Jul 2009 12:40:50 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-27-brainstuff-catnip.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-27-brainstuff-catnip.mp3' length='2300308' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, catnip, catnip plant, catnip herb, catnip imported, catnip chemical</itunes:keywords>
            <itunes:duration>00:02:21</itunes:duration>
            <itunes:subtitle>You've probably heard that catnip drives felines wild, but did you know that it's a plant related to mint? And that it doesn't affect all cats? Find out how catnip works in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How much does planet Earth weigh?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-24-brainstuff-earth-weigh.mp3</link>
            <description>As far as weight goes, Earth is a pretty hefty celestial body. But exactly how heavy? And how does one measure something so massive? Find out in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 24 Jul 2009 10:18:41 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-24-brainstuff-earth-weigh.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-24-brainstuff-earth-weigh.mp3' length='1649557' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, how much does the earth weigh, mass, calculating mass</itunes:keywords>
            <itunes:duration>00:02:40</itunes:duration>
            <itunes:subtitle>As far as weight goes, Earth is a pretty hefty celestial body. But exactly how heavy? And how does one measure something so massive? Find out in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What's the deal with milk?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-22-brainstuff-milk.mp3</link>
            <description>Milk is often touted as a &quot;miracle drink,&quot; full of restorative, nutritional properties. And there's some truth to this claim. Find out why mammal milk is called &quot;the perfect food&quot; in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 22 Jul 2009 12:49:58 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-22-brainstuff-milk.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-22-brainstuff-milk.mp3' length='1934553' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, milk miracle drink, milk nutritional, mammal milk</itunes:keywords>
            <itunes:duration>00:03:09</itunes:duration>
            <itunes:subtitle>Milk is often touted as a &quot;miracle drink,&quot; full of restorative, nutritional properties. And there's some truth to this claim. Find out why mammal milk is called &quot;the perfect food&quot; in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is the right way to remove a leech?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-20-brainstuff-leech-removal.mp3</link>
            <description>People have cooked up all sorts of ways to remove leeches over the years, but the simplest is still the most effective. Discover how to safely detach a leech using your hands in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 20 Jul 2009 11:03:59 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-20-brainstuff-leech-removal.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-20-brainstuff-leech-removal.mp3' length='1590781' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, right way to remove a leech, leech removal</itunes:keywords>
            <itunes:duration>00:02:34</itunes:duration>
            <itunes:subtitle>People have cooked up all sorts of ways to remove leeches over the years, but the simplest is still the most effective. Discover how to safely detach a leech using your hands in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do honeybees make honey?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-17-brainstuff-honey.mp3</link>
            <description>When it comes to making honey, bees are skilled chemists. Discover how they use enzymes to turn sugary flower nectar into a sweet, stable food source in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 17 Jul 2009 10:10:36 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-17-brainstuff-honey.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-17-brainstuff-honey.mp3' length='1353198' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, honey, honeybees, how do bees make honey, pollen, enzymes</itunes:keywords>
            <itunes:duration>00:02:18</itunes:duration>
            <itunes:subtitle>When it comes to making honey, bees are skilled chemists. Discover how they use enzymes to turn sugary flower nectar into a sweet, stable food source in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do electric plugs have holes?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-15-brainstuff-plug.mp3</link>
            <description>You might have noticed that plugs for electric appliances have two holes. There are three reasons for these apertures -- find out what they are in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 15 Jul 2009 12:20:16 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-15-brainstuff-plug.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-15-brainstuff-plug.mp3' length='1208939' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, prongs, electric plug holes, contact wiper, detenting</itunes:keywords>
            <itunes:duration>00:02:26</itunes:duration>
            <itunes:subtitle>You might have noticed that plugs for electric appliances have two holes. There are three reasons for these apertures -- find out what they are in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a medical leech?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-13-brainstuff-medical-leech.mp3</link>
            <description>Medical leeches are raised in captivity and help patients heal wounds. Discover how leeches and other parasites are used for medical purposes in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 13 Jul 2009 11:46:44 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-13-brainstuff-medical-leech.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-13-brainstuff-medical-leech.mp3' length='1305325' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, medical leech, medical parasites, medical maggots, anti-coagulant</itunes:keywords>
            <itunes:duration>00:02:37</itunes:duration>
            <itunes:subtitle>Medical leeches are raised in captivity and help patients heal wounds. Discover how leeches and other parasites are used for medical purposes in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What exactly is pastrami?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-10-brainstuff-pastrami.mp3</link>
            <description>Like cheese, pastrami is a good example of old-fashioned food preservation techniques. Find out how corned beef becomes pastrami in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 10 Jul 2009 10:38:38 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-10-brainstuff-pastrami.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-10-brainstuff-pastrami.mp3' length='1486750' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, pastrami, food preservation, salt, corned beef, smoked</itunes:keywords>
            <itunes:duration>00:03:00</itunes:duration>
            <itunes:subtitle>Like cheese, pastrami is a good example of old-fashioned food preservation techniques. Find out how corned beef becomes pastrami in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why are my power bills so high?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-08-brainstuff-power.mp3</link>
            <description>When it comes to energy usage, heating and cooling appliances contribute the most to your power bill. Tune in to find out which appliances are the most power-hungry -- and why -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 08 Jul 2009 12:40:11 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-08-brainstuff-power.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-08-brainstuff-power.mp3' length='1683242' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, high power bills, appliances, heating, cooling</itunes:keywords>
            <itunes:duration>00:03:32</itunes:duration>
            <itunes:subtitle>When it comes to energy usage, heating and cooling appliances contribute the most to your power bill. Tune in to find out which appliances are the most power-hungry -- and why -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does pressure-treated lumber work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-06-brainstuff-pressure-treated.mp3</link>
            <description>Treating lumber with chemicals is an effective way to protect wood from pests and other organisms. Find out why pressure-treated lumber holds up better -- and how it works -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 06 Jul 2009 11:25:56 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-06-brainstuff-pressure-treated.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-06-brainstuff-pressure-treated.mp3' length='1641547' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, pressure-treated lumber, moisture, liquid preservative, pressurized, cca, acq</itunes:keywords>
            <itunes:duration>00:02:42</itunes:duration>
            <itunes:subtitle>Treating lumber with chemicals is an effective way to protect wood from pests and other organisms. Find out why pressure-treated lumber holds up better -- and how it works -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can an electric toothbrush recharge its batteries?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-03-brainstuff-toothbrush.mp3</link>
            <description>An electric toothbrush gets power from its base without the help of metal contacts. Find out how this sealed system works in the following podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 03 Jul 2009 11:57:34 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-03-brainstuff-toothbrush.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-03-brainstuff-toothbrush.mp3' length='1042965' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, electric toothbrush, recharge, batteries, inductive charging, transformer</itunes:keywords>
            <itunes:duration>00:01:42</itunes:duration>
            <itunes:subtitle>An electric toothbrush gets power from its base without the help of metal contacts. Find out how this sealed system works in the following podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do neon and fluorescent lights differ?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-01-brainstuff-neon.mp3</link>
            <description>Neon and fluorescent lights differ in several ways, including bulb shape, color of light emitted and substances used to produce that light. Find out how neon and fluorescent lights work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 01 Jul 2009 10:45:21 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-01-brainstuff-neon.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-07-01-brainstuff-neon.mp3' length='1486370' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, neon light, fluorescent light, neon gas, mercury vapor, phosphor</itunes:keywords>
            <itunes:duration>00:03:00</itunes:duration>
            <itunes:subtitle>Neon and fluorescent lights differ in several ways, including bulb shape, color of light emitted and substances used to produce that light. Find out how neon and fluorescent lights work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do hopping cars work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-29-brainstuff-lowrider.mp3</link>
            <description>Lowriders are vehicles that ride very low to the ground and are often equipped with hydraulics systems that allow the cars to &quot;hop.&quot; Learn more in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 29 Jun 2009 10:54:27 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-29-brainstuff-lowrider.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-29-brainstuff-lowrider.mp3' length='1199937' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, lowrider, hopping cars, Southern California, hydraulics</itunes:keywords>
            <itunes:duration>00:01:57</itunes:duration>
            <itunes:subtitle>Lowriders are vehicles that ride very low to the ground and are often equipped with hydraulics systems that allow the cars to &quot;hop.&quot; Learn more in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does an Indiglo watch work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-26-brainstuff-indiglo.mp3</link>
            <description>An Indiglo watch works a lot like a neon sign, getting its signature &quot;glow&quot; from electroluminescence. Tune in to hear Marshall Brain explain the finer points of Indiglo watch technology in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 26 Jun 2009 10:46:17 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-26-brainstuff-indiglo.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-26-brainstuff-indiglo.mp3' length='1447367' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, indiglo watch, electroluminescence, electricity, light, neon sign, phosphor</itunes:keywords>
            <itunes:duration>00:02:23</itunes:duration>
            <itunes:subtitle>An Indiglo watch works a lot like a neon sign, getting its signature &quot;glow&quot; from electroluminescence. Tune in to hear Marshall Brain explain the finer points of Indiglo watch technology in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do sodium acetate heat pads work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-24-brainstuff-sodium-acetate-heat-pad.mp3</link>
            <description>Sodium acetate heat pads start out as a pouch of liquid and crystallize into a warm solid. Explore the fascinating chemistry that makes these heat pads work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 24 Jun 2009 10:30:22 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-24-brainstuff-sodium-acetate-heat-pad.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-24-brainstuff-sodium-acetate-heat-pad.mp3' length='1340890' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, sodium acetate heat pad, heat, sodium acetate</itunes:keywords>
            <itunes:duration>00:02:32</itunes:duration>
            <itunes:subtitle>Sodium acetate heat pads start out as a pouch of liquid and crystallize into a warm solid. Explore the fascinating chemistry that makes these heat pads work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does water desalination work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-22-brainstuff-desalination.mp3</link>
            <description>Most of the water on the planet is salty, so people have come up with various ways to turn it into freshwater. Explore three methods of desalinating water in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 22 Jun 2009 10:33:56 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-22-brainstuff-desalination.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-22-brainstuff-desalination.mp3' length='1196699' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, water desalination, saltwater, reverse osmosis, boiling, flash distillation, water cone</itunes:keywords>
            <itunes:duration>00:02:14</itunes:duration>
            <itunes:subtitle>Most of the water on the planet is salty, so people have come up with various ways to turn it into freshwater. Explore three methods of desalinating water in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do self-winding watches work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-19-brainstuff-self-winding-watch.mp3</link>
            <description>Self-winding watches keep the time with the help of a piece of metal, gravity and the natural movement of your arm. Tune in to learn more about self-winding watches in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 19 Jun 2009 09:09:42 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-19-brainstuff-self-winding-watch.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-19-brainstuff-self-winding-watch.mp3' length='992972' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, self-winding watch, metal, gravity, gear train, arm</itunes:keywords>
            <itunes:duration>00:01:51</itunes:duration>
            <itunes:subtitle>Self-winding watches keep the time with the help of a piece of metal, gravity and the natural movement of your arm. Tune in to learn more about self-winding watches in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What are frankincense and myrrh?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-17-brainstuff-frankincense-and-myrrh.mp3</link>
            <description>You might recognize frankincense and myrrh from the Biblical story of Jesus, but have you ever wondered exactly what they are? Tune in to get the skinny on frankincense and myrrh in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 17 Jun 2009 11:21:45 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-17-brainstuff-frankincense-and-myrrh.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-17-brainstuff-frankincense-and-myrrh.mp3' length='824669' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, frankincense, myrrh, Jesus, burial</itunes:keywords>
            <itunes:duration>00:01:33</itunes:duration>
            <itunes:subtitle>You might recognize frankincense and myrrh from the Biblical story of Jesus, but have you ever wondered exactly what they are? Tune in to get the skinny on frankincense and myrrh in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can turbines change our energy future?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-15-brainstuff-future-turbine.mp3</link>
            <description>Gas turbine engines often power jet airplanes and helicopters, but they may turn up in other applications in the near future. Discover how turbine engines work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 15 Jun 2009 11:51:38 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-15-brainstuff-future-turbine.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-15-brainstuff-future-turbine.mp3' length='1196633' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, turbines, energy, future, gas turbine, jet, helicopter</itunes:keywords>
            <itunes:duration>00:02:15</itunes:duration>
            <itunes:subtitle>Gas turbine engines often power jet airplanes and helicopters, but they may turn up in other applications in the near future. Discover how turbine engines work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a stratospheric aerosol?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-12-brainstuff-stratospheric-aerosols.mp3</link>
            <description>Stratospheric aerosols have been proposed as a new way to combat global warming. Discover how stratospheric aerosols would work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 12 Jun 2009 12:51:24 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-12-brainstuff-stratospheric-aerosols.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-12-brainstuff-stratospheric-aerosols.mp3' length='1183924' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, stratospheric aerosols, atmosphere, global warming, environment, green</itunes:keywords>
            <itunes:duration>00:02:08</itunes:duration>
            <itunes:subtitle>Stratospheric aerosols have been proposed as a new way to combat global warming. Discover how stratospheric aerosols would work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is a tank engine?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-10-brainstuff-thomas.mp3</link>
            <description>You've probably heard of the beloved character Thomas the Tank Engine, but have you ever wondered what makes him a tank engine? Discover what sets Thomas apart from his locomotive pals in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 10 Jun 2009 11:10:43 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-10-brainstuff-thomas.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-10-brainstuff-thomas.mp3' length='1383337' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, Thomas the tank engine, steam engine, short haul, coal car, train, railroad</itunes:keywords>
            <itunes:duration>00:02:13</itunes:duration>
            <itunes:subtitle>You've probably heard of the beloved character Thomas the Tank Engine, but have you ever wondered what makes him a tank engine? Discover what sets Thomas apart from his locomotive pals in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do space mirrors work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-08-brainstuff-space-mirrors.mp3</link>
            <description>Mirrors placed in space could deflect excessive sunlight and combat global warming trends. Find out more about space mirrors in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 08 Jun 2009 13:19:57 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-08-brainstuff-space-mirrors.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-08-brainstuff-space-mirrors.mp3' length='941243' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, space mirrors, global warming, deflect, sunlight, sunshades</itunes:keywords>
            <itunes:duration>00:01:46</itunes:duration>
            <itunes:subtitle>Mirrors placed in space could deflect excessive sunlight and combat global warming trends. Find out more about space mirrors in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do the engines breathe in diesel submarines?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-05-brainstuff-diesel-sub.mp3</link>
            <description>Diesel submarines are actually hybrid vehicles. Find out why -- and exactly how they work -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 05 Jun 2009 09:40:54 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-05-brainstuff-diesel-sub.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-05-brainstuff-diesel-sub.mp3' length='1059692' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, engine, diesel submarine, breathe, sub, hybrid</itunes:keywords>
            <itunes:duration>00:01:41</itunes:duration>
            <itunes:subtitle>Diesel submarines are actually hybrid vehicles. Find out why -- and exactly how they work -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do CD-R discs work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-03-brainstuff-cd-r-disc.mp3</link>
            <description>Unlike a regular CD, a CD-R has a special dye layer that allows you to imprint data on it. Discover the mechanics of CD-R discs in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 03 Jun 2009 10:58:12 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-03-brainstuff-cd-r-disc.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-03-brainstuff-cd-r-disc.mp3' length='1337589' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, cd-r disc, laser, reflective area, nonreflective bump, green dye, recordable compact disc, cd</itunes:keywords>
            <itunes:duration>00:02:30</itunes:duration>
            <itunes:subtitle>Unlike a regular CD, a CD-R has a special dye layer that allows you to imprint data on it. Discover the mechanics of CD-R discs in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Where do bullets go when guns are fired into the air?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-01-brainstuff-bullets-in-air.mp3</link>
            <description>When people fire guns into the air in a celebratory manner, those bullets have to go somewhere. Find out how high fired bullets can go -- and why they can be dangerous -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 01 Jun 2009 10:59:55 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-01-brainstuff-bullets-in-air.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-06-01-brainstuff-bullets-in-air.mp3' length='852940' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, bullets, fired, straight up, air resistance</itunes:keywords>
            <itunes:duration>00:01:35</itunes:duration>
            <itunes:subtitle>When people fire guns into the air in a celebratory manner, those bullets have to go somewhere. Find out how high fired bullets can go -- and why they can be dangerous -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do scratch-and-sniff stickers work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-29-brainstuff-scratch-and-sniff.mp3</link>
            <description>Scratch-and-sniff stickers are novelties that delight both children and adults. Sniff out the ingenious technology that makes them work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 29 May 2009 09:08:37 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-29-brainstuff-scratch-and-sniff.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-29-brainstuff-scratch-and-sniff.mp3' length='1245359' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, scratch and sniff, stickers, microencapsulation, children's books, aroma, copy paper</itunes:keywords>
            <itunes:duration>00:02:21</itunes:duration>
            <itunes:subtitle>Scratch-and-sniff stickers are novelties that delight both children and adults. Sniff out the ingenious technology that makes them work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a dollar bill changer work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-27-brainstuff-bill-changer.mp3</link>
            <description>A dollar bill changer doesn't just have to sense a bill's denomination -- it also needs to be able to tell whether bills are fake. Join Marshall Brain as he breaks down the science behind bill changers in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 27 May 2009 12:08:22 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-27-brainstuff-bill-changer.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-27-brainstuff-bill-changer.mp3' length='1392281' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, how do bill changers work, dollar bill changer</itunes:keywords>
            <itunes:duration>00:02:37</itunes:duration>
            <itunes:subtitle>A dollar bill changer doesn't just have to sense a bill's denomination -- it also needs to be able to tell whether bills are fake. Join Marshall Brain as he breaks down the science behind bill changers in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What happens when you press Alt and F4?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-25-brainstuff-alt-f4-key.mp3</link>
            <description>The alt-f4 key combination is a faster way to close a window on your computer. Learn more about this and several other keyboard shortcuts in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 25 May 2009 15:28:52 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-25-brainstuff-alt-f4-key.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-25-brainstuff-alt-f4-key.mp3' length='1277324' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, alt-f4 key, keystroke, window, close, keyboard shortcuts, windows key</itunes:keywords>
            <itunes:duration>00:02:22</itunes:duration>
            <itunes:subtitle>The alt-f4 key combination is a faster way to close a window on your computer. Learn more about this and several other keyboard shortcuts in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do candles work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-22-brainstuff-candle.mp3</link>
            <description>Before there were light bulbs, candles made the world a brighter place. Discover the ingenious technology behind candles in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 22 May 2009 09:38:28 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-22-brainstuff-candle.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-22-brainstuff-candle.mp3' length='1657521' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, candle, fuel, wax, wick, twine, absorbent, vapor, paraffin, vaporize, combustion</itunes:keywords>
            <itunes:duration>00:03:05</itunes:duration>
            <itunes:subtitle>Before there were light bulbs, candles made the world a brighter place. Discover the ingenious technology behind candles in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do Mexican jumping beans work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-20-brainstuff-mexican-jumping-beans.mp3</link>
            <description>Although Mexican jumping beans don't actually jump, they're definitely more active than your average bean. Find out how a moth makes them move in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 20 May 2009 11:25:36 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-20-brainstuff-mexican-jumping-beans.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-20-brainstuff-mexican-jumping-beans.mp3' length='1136471' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, mexican jumping beans, moth larva, eggs, seeds, moths</itunes:keywords>
            <itunes:duration>00:02:04</itunes:duration>
            <itunes:subtitle>Although Mexican jumping beans don't actually jump, they're definitely more active than your average bean. Find out how a moth makes them move in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does dry ice work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-18-brainstuff-dry-ice.mp3</link>
            <description>Dry ice is different from regular ice in several ways. Find out what makes dry ice so unique -- and why it's so good for transporting perishables over long distances -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 18 May 2009 13:08:30 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-18-brainstuff-dry-ice.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-18-brainstuff-dry-ice.mp3' length='566123' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, dry ice, carbon dioxide, frozen, sublimation, gas, liquid nitrogen, solid</itunes:keywords>
            <itunes:duration>00:03:28</itunes:duration>
            <itunes:subtitle>Dry ice is different from regular ice in several ways. Find out what makes dry ice so unique -- and why it's so good for transporting perishables over long distances -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What causes that howling sound in PA systems?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-15-brainstuff-feedback.mp3</link>
            <description>A public address system's speakers emit strange noises, or feedback, when sound gets re-amplified. Get a detailed explanation of how feedback occurs in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 15 May 2009 13:08:47 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-15-brainstuff-feedback.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-15-brainstuff-feedback.mp3' length='1203336' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, feedback, PA system, public address, speakers, noise, loop, microphone, amplified</itunes:keywords>
            <itunes:duration>00:02:11</itunes:duration>
            <itunes:subtitle>A public address system's speakers emit strange noises, or feedback, when sound gets re-amplified. Get a detailed explanation of how feedback occurs in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a hybrid car work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-13-brainstuff-hybrid-car.mp3</link>
            <description>Hybrid cars combine electric motors and smaller gasoline engines in an attempt to increase efficiency. Find out exactly how they work in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 13 May 2009 13:02:21 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-13-brainstuff-hybrid-car.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-13-brainstuff-hybrid-car.mp3' length='1985948' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, hybrid cars, electric motor, gas engine, efficiency, drivetrain, heavy, braking</itunes:keywords>
            <itunes:duration>00:03:36</itunes:duration>
            <itunes:subtitle>Hybrid cars combine electric motors and smaller gasoline engines in an attempt to increase efficiency. Find out exactly how they work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is dry ice dangerous?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-11-brainstuff-dry-ice-dangerous.mp3</link>
            <description>Dry ice is different from regular ice because it's extremely cold and it emits carbon dioxide. Discover why the substance can be dangerous -- and safe ways to handle it -- in this podcast from HowStuffWorks.com.</description>
            <pubDate>Mon, 11 May 2009 09:32:57 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-11-brainstuff-dry-ice-dangerous.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-11-brainstuff-dry-ice-dangerous.mp3' length='974476' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, dry ice, dangerous, super cold, temperature, gloves, carbon dioxide, ventilation</itunes:keywords>
            <itunes:duration>00:01:46</itunes:duration>
            <itunes:subtitle>Dry ice is different from regular ice because it's extremely cold and it emits carbon dioxide. Discover why the substance can be dangerous -- and safe ways to handle it -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What's the birthday paradox?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-08-brainstuff-birthday-paradox.mp3</link>
            <description>In a group of 20, there's a 50/50 chance that two people will have the same birthday; this is called the birthday paradox. Find out how it works in this podcast from HowStuffWorks.com.</description>
            <pubDate>Fri, 08 May 2009 07:17:19 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-08-brainstuff-birthday-paradox.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-08-brainstuff-birthday-paradox.mp3' length='1280374' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, birthday paradox, same, birthday, group, individual, cryptography, hashing algorithm, birthday</itunes:keywords>
            <itunes:duration>00:02:20</itunes:duration>
            <itunes:subtitle>In a group of 20, there's a 50/50 chance that two people will have the same birthday; this is called the birthday paradox. Find out how it works in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is market capitalization?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-06-brainstuff-stock-capitalization.mp3</link>
            <description>If all the money in the US only totals 8 trillion dollars, how can the New York Stock Exchange have stocks valued at 26 trillion dollars? Tune in as Marshall Brain breaks down the practice of stock capitalization in this podcast from HowStuffWorks.com.</description>
            <pubDate>Wed, 06 May 2009 13:22:54 -0400</pubDate>
            <guid>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-06-brainstuff-stock-capitalization.mp3</guid>
            <author>podcast@howstuffworks.com (BrainStuff)</author>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-06-brainstuff-stock-capitalization.mp3' length='1568358' type='audio/mpeg' />
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, stock capitalization, new york stock exchange</itunes:keywords>
            <itunes:duration>00:02:56</itunes:duration>
            <itunes:subtitle>If all the money in the US only totals 8 trillion dollars, how can the New York Stock Exchange have stocks valued at 26 trillion dollars? Tune in as Marshall Brain breaks down the practice of stock capitalization in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is sodium nitrate?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-04-brainstuff-sodium-nitrate.mp3</link>
            <description>You'll find sodium nitrate in lots of pink meats like hot dogs and salami, but why? And is it bad for you? Find out what's up with sodium nitrate in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-04-brainstuff-sodium-nitrate.mp3' length='1258291' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 04 May 2009 10:25:00 -0400</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://podcasts.discovery.com/hsw/podcasts/brainstuff/2009-05-04-brainstuff-sodium-nitrate.mp3</guid>
            <itunes:duration>00:02:23</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, sodium nitrate, hot dog, salami, pink, preservative, health, sodium nitrite</itunes:keywords>
            <itunes:subtitle>You'll find sodium nitrate in lots of pink meats like hot dogs and salami, but why? And is it bad for you? Find out what's up with sodium nitrate in this podcast from HowStuffWorks.com.</itunes:subtitle>
        </item>
        <item>
            <title>How does the oxygen sensor in a car work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-01-brainstuff-oxygen-sensor.mp3</link>
            <description>All new cars sport oxygen sensors that are designed to cut down emissions and keep the engine running smoothly. Find out exactly how these sensors work in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-05-01-brainstuff-oxygen-sensor.mp3' length='1381598' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 01 May 2009 10:18:00 -0400</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://podcasts.discovery.com/hsw/podcasts/brainstuff/2009-05-01-brainstuff-oxygen-sensor.mp3</guid>
            <itunes:duration>00:02:35</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, oxygen sensor, emissions, engine, mixture, lean, rich, air fuel ratio</itunes:keywords>
            <itunes:subtitle>All new cars sport oxygen sensors that are designed to cut down emissions and keep the engine running smoothly. Find out exactly how these sensors work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do motion sensors work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-29-brainstuff-motion-sensors.mp3</link>
            <description>There are many kinds of motion sensors, from active to passive systems. Get the scoop on how myriad motion sensing systems work in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-29-brainstuff-motion-sensors.mp3' length='1484302' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 29 Apr 2009 06:41:00 -0400</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://podcasts.discovery.com/hsw/podcasts/brainstuff/2009-04-29-brainstuff-motion-sensors.mp3</guid>
            <itunes:duration>00:02:46</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, motion sensors, burglar alarms, radar, motion sensing, PIR, infrared, temperature</itunes:keywords>
            <itunes:subtitle>There are many kinds of motion sensors, from active to passive systems. Get the scoop on how myriad motion sensing systems work in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What would happen on a carousel moving at the speed of light?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-27-brainstuff-light-carosel.mp3</link>
            <description>If you could spin a carousel fast enough, would time stand still for the people on the carousel? Theoretically, it's a reasonable assumption. Join Marshall Brain as he breaks down the speed of light and time in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-27-brainstuff-light-carosel.mp3' length='1471799' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 27 Apr 2009 15:41:00 -0400</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://podcasts.discovery.com/hsw/podcasts/brainstuff/2009-04-27-brainstuff-light-carosel.mp3</guid>
            <itunes:duration>00:02:45</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, carousel, carousel at the speed of light, brainstuff</itunes:keywords>
            <itunes:subtitle>If you could spin a carousel fast enough, would time stand still for the people on the carousel? Theoretically, it's a reasonable assumption. Join Marshall Brain as he breaks down the speed of light and time in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why does my hard drive make that churning sound?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-24-brainstuff-hd-churning.mp3</link>
            <description>Inside the hard drive of many computers, a small arm moves across the face of the hard disk. Tune in to this podcast from HowStuffWorks.com to discover how the movement of this arm produces sound -- and why the arm must move to load files.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-24-brainstuff-hd-churning.mp3' length='1700665' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 24 Apr 2009 07:10:00 -0400</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://podcasts.discovery.com/hsw/podcasts/brainstuff/2009-04-24-brainstuff-hd-churning.mp3</guid>
            <itunes:duration>00:03:13</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, hard drive, hard disk, churning, retrieving, data, arm, sound, files</itunes:keywords>
            <itunes:subtitle>Inside the hard drive of many computers, a small arm moves across the face of the hard disk. Tune in to this podcast from HowStuffWorks.com to discover how the movement of this arm produces sound -- and why the arm must move to load files.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a Fresnel lens work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-22-brainstuff-fresnel-lens.mp3</link>
            <description>The thin piece of plastic called a Fresnel lens solves some of the problems inherent in traditional magnifying lenses. Learn more about the benefits and weaknesses of Fresnel lenses in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-22-brainstuff-fresnel-lens.mp3' length='1234753' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 22 Apr 2009 07:32:00 -0400</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://podcasts.discovery.com/hsw/podcasts/brainstuff/2009-04-22-brainstuff-fresnel-lens.mp3</guid>
            <itunes:duration>00:02:20</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, Fresnel lens, optics, lens, plastic lens, magnifying glass, design, benefits</itunes:keywords>
            <itunes:subtitle>The thin piece of plastic called a Fresnel lens solves some of the problems inherent in traditional magnifying lenses. Learn more about the benefits and weaknesses of Fresnel lenses in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a Crooke's radiometer work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-20-brainstuff-crookes-radiometer.mp3</link>
            <description>Vacuums and light combine to power a Crooke's radiometer -- but how does it work? Listen in and learn more about the mechanisms inside the radiometer in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-20-brainstuff-crookes-radiometer.mp3' length='1013529' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 20 Apr 2009 09:49:00 -0400</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://podcasts.discovery.com/hsw/podcasts/brainstuff/2009-04-20-brainstuff-crookes-radiometer.mp3</guid>
            <itunes:duration>00:01:54</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks,  brainstuff, Crooke's radiometer</itunes:keywords>
            <itunes:subtitle>Vacuums and light combine to power a Crooke's radiometer -- but how does it work? Listen in and learn more about the mechanisms inside the radiometer in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How is wire measured?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-17-brainstuff-wire-diameter.mp3</link>
            <description>In the United States, wires are measured by diameter using a standard called AWG, or American Wire Gauge. Discover how the AWG system works -- and where it came from -- in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-17-brainstuff-wire-diameter.mp3' length='854640' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 17 Apr 2009 09:49:00 -0400</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://podcasts.discovery.com/hsw/podcasts/brainstuff/2009-04-17-brainstuff-wire-diameter.mp3</guid>
            <itunes:duration>00:01:39</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, wire, diameter, measurement, AWG, american wire gauge, gauge, higher, thinner</itunes:keywords>
            <itunes:subtitle>In the United States, wires are measured by diameter using a standard called AWG, or American Wire Gauge. Discover how the AWG system works -- and where it came from -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does an upside down airplane's engine get fuel?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-15-brainstuff-upside-down-airplane.mp3</link>
            <description>Airplanes rely on gravity to disperse fuel to the engine, but what happens when the plane is flying upside down? Tune in to this podcast from HowStuffWorks.com to discover ways that acrobatic planes fly upside down without crashing.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-15-brainstuff-upside-down-airplane.mp3' length='959369' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 15 Apr 2009 10:15:00 -0400</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://podcasts.discovery.com/hsw/podcasts/brainstuff/2009-04-15-brainstuff-upside-down-airplane.mp3</guid>
            <itunes:duration>00:01:52</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, acrobatic plane, fuel, upside down, gravity, flop tube, fuel tank</itunes:keywords>
            <itunes:subtitle>Airplanes rely on gravity to disperse fuel to the engine, but what happens when the plane is flying upside down? Tune in to this podcast from HowStuffWorks.com to discover ways that acrobatic planes fly upside down without crashing.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What's that bumpy stuff on my ceiling?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-13-brainstuff-popcorn-ceiling.mp3</link>
            <description>That popcorn-like stuff on your ceiling is actually a specific kind of ceiling finish. Tune in to this podcast from HowStuffWorks.com to find out what this treatment is -- and why it's so popular.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-13-brainstuff-popcorn-ceiling.mp3' length='1058136' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 13 Apr 2009 09:50:00 -0400</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://podcasts.discovery.com/hsw/podcasts/brainstuff/2009-04-13-brainstuff-popcorn-ceiling.mp3</guid>
            <itunes:duration>00:02:03</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, popcorn, ceiling, treatment, acoustic finish, textured finish, imperfections, echo, plaster</itunes:keywords>
            <itunes:subtitle>That popcorn-like stuff on your ceiling is actually a specific kind of ceiling finish. Tune in to this podcast from HowStuffWorks.com to find out what this treatment is -- and why it's so popular.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does popcorn work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-10-brainstuff-popcorn.mp3</link>
            <description>Popcorn is a ubiquitous snack, but there's nothing commonplace about its creation. How does a kernel of corn become a puffed white treat? Find out in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-10-brainstuff-popcorn.mp3' length='1385275' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 10 Apr 2009 07:32:00 -0400</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://podcasts.discovery.com/hsw/podcasts/brainstuff/2009-04-10-brainstuff-popcorn.mp3</guid>
            <itunes:duration>00:02:37</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, popcorn, kernel, starch, moisture, pressure, shell, explode, heat, bread, needle</itunes:keywords>
            <itunes:subtitle>Popcorn is a ubiquitous snack, but there's nothing commonplace about its creation. How does a kernel of corn become a puffed white treat? Find out in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Is there a way to detect illegal phone taps?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-08-brainstuff-phone-taps.mp3</link>
            <description>Tapping into someone's phone line is relatively easy to do on a land line. Fortunately, phone taps are easy to detect. Tune in to this podcast from HowStuffWorks.com to get Marshall Brain's tips on ferreting out illegal phone taps.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-08-brainstuff-phone-taps.mp3' length='1189635' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 08 Apr 2009 07:32:00 -0400</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://podcasts.discovery.com/hsw/podcasts/brainstuff/2009-04-08-brainstuff-phone-taps.mp3</guid>
            <itunes:duration>00:02:17</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, phone taps, illegal, federal offense, splice, land line, tape recorder</itunes:keywords>
            <itunes:subtitle>Tapping into someone's phone line is relatively easy to do on a land line. Fortunately, phone taps are easy to detect. Tune in to this podcast from HowStuffWorks.com to get Marshall Brain's tips on ferreting out illegal phone taps.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does an oxygen canister on an airplane work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-06-brainstuff-oxygen-canister.mp3</link>
            <description>When you think of storing oxygen, metal tanks full of gas might come to mind. There's also a chemical method --  tune in to this podcast from HowStuffWorks.com to learn about how oxygen canisters work.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-06-brainstuff-oxygen-canister.mp3' length='1358237' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 06 Apr 2009 11:32:00 -0400</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://podcasts.discovery.com/hsw/podcasts/brainstuff/2009-04-06-brainstuff-oxygen-canister.mp3</guid>
            <itunes:duration>00:02:36</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, oxygen canister, store, oxygen, scuba, chemical oxygen generators, sodium chlorate</itunes:keywords>
            <itunes:subtitle>When you think of storing oxygen, metal tanks full of gas might come to mind. There's also a chemical method --  tune in to this podcast from HowStuffWorks.com to learn about how oxygen canisters work.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does nitrous oxide help an engine perform better?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-03-brainstuff-nitrous.mp3</link>
            <description>Nitrous oxide boosts engine power in two significant ways. Find out exactly how nitrous works its magic in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-03-brainstuff-nitrous.mp3' length='1140716' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 03 Apr 2009 11:30:00 -0400</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://podcasts.discovery.com/hsw/podcasts/brainstuff/2009-04-03-brainstuff-nitrous.mp3</guid>
            <itunes:duration>00:02:11</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, nitrous oxide, engine, power, combustion, nitrous, oxygen, heat, cooling, nitrogen</itunes:keywords>
            <itunes:subtitle>Nitrous oxide boosts engine power in two significant ways. Find out exactly how nitrous works its magic in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do nail penny measurements work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-01-brainstuff-nail-pennies.mp3</link>
            <description>Nails are measured by a unit called a penny. This podcast from HowStuffWorks.com explains what the penny designation means -- and where it comes from.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-04-01-brainstuff-nail-pennies.mp3' length='984972' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 01 Apr 2009 08:00:00 -0400</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://podcasts.discovery.com/hsw/podcasts/brainstuff/2009-04-01-brainstuff-nail-pennies.mp3</guid>
            <itunes:duration>00:01:40</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, nails, pennies, penny, diameter, measurement, unit, measured, nail pennies, nail</itunes:keywords>
            <itunes:subtitle>Nails are measured by a unit called a penny. This podcast from HowStuffWorks.com explains what the penny designation means -- and where it comes from.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Can you explain the diameter measurements used in bullets?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-30-bullet-caliber.mp3</link>
            <description>Bullets are measured by calibers, which indicate their diameter in inches. Find out more about bullets and measurement in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-30-bullet-caliber.mp3' length='949535' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 30 Mar 2009 20:00:00 +0000</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://podcasts.discovery.com/hsw/podcasts/brainstuff/2009-03-30-bullet-caliber.mp3</guid>
            <itunes:duration>00:01:36</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, bullet, caliber, diameter, measurements, magnum, special, gauge, powder, shotgun, lead</itunes:keywords>
            <itunes:subtitle>Bullets are measured by calibers, which indicate their diameter in inches. Find out more about bullets and measurement in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Can grilling meat really cause cancer?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-23-brainstuff-meat-cancer.mp3</link>
            <description>Lots of people like to grill their meat, but this popular cooking method has been linked to cancer. Discover how chemical reactions make grilled meat potentially carcinogenic in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-23-brainstuff-meat-cancer.mp3' length='1086266' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 23 Mar 2009 12:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1237580730804hsw-brainstuff-meat-cancer.mp3</guid>
            <itunes:duration>00:02:06</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, cancer, grilling, meat, polycyclic aromatic hydrocarbons, benzene rings, heat, chemical</itunes:keywords>
            <itunes:subtitle>Lots of people like to grill their meat, but this popular cooking method has been linked to cancer. Discover how chemical reactions make grilled meat potentially carcinogenic in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does gravity work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-20-brainstuff-gravity.mp3</link>
            <description>Gravity affects us every single day, but how does this oh-so-common force of nature work? Tune in to this podcast from HowStuffWorks.com to take a look at the nuts and bolts of gravity.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-20-brainstuff-gravity.mp3' length='1396551' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 20 Mar 2009 12:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1237483480553hsw-brainstuff-gravity.mp3</guid>
            <itunes:duration>00:02:24</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, gravity, mass, force, G, Newton, Einstein, gravitational constant, dyne, law</itunes:keywords>
            <itunes:subtitle>Gravity affects us every single day, but how does this oh-so-common force of nature work? Tune in to this podcast from HowStuffWorks.com to take a look at the nuts and bolts of gravity.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How quickly does hair grow?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-18-brainstuff-hair-growth.mp3</link>
            <description>On average, human hair grows a small amount each day. Listen in as Marshall Brain explains hair growth in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-18-brainstuff-hair-growth.mp3' length='580283' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 18 Mar 2009 12:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1237313901173hsw-brainstuff-hair-growth.mp3</guid>
            <itunes:duration>00:01:07</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, hair growth, human, hair, grow, millimeter, long hair, six years</itunes:keywords>
            <itunes:subtitle>On average, human hair grows a small amount each day. Listen in as Marshall Brain explains hair growth in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How long can a germ live in a room?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-16-brainstuff-germ-life.mp3</link>
            <description>How long can a germ last outside the body? It depends. Tune in to this podcast from HowStuffWorks.com to find out how different germs fare outside the body.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-16-brainstuff-germ-life.mp3' length='983728' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 16 Mar 2009 12:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1236974289713hsw-brainstuff-germ-life.mp3</guid>
            <itunes:duration>00:01:53</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, germ, type, infectious, virus, bacterium, smallpox, anthrax, AIDS, hepatitis, syphilis</itunes:keywords>
            <itunes:subtitle>How long can a germ last outside the body? It depends. Tune in to this podcast from HowStuffWorks.com to find out how different germs fare outside the body.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do fog machines work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-13-brainstuff-fog-machine.mp3</link>
            <description>There are several types of fog machines, each with specific advantages and disadvantages. Listen in to learn more about fog machines.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-13-brainstuff-fog-machine.mp3' length='828793' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 13 Mar 2009 12:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1236367805071hsw-brainstuff-fog-machine.mp3</guid>
            <itunes:duration>00:01:36</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, fog machine, how do fog machines work, fog, dry ice</itunes:keywords>
            <itunes:subtitle>There are several types of fog machines, each with specific advantages and disadvantages. Listen in to learn more about fog machines.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does a chicken's egg get its shell?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-11-brainstuff-egg-shells.mp3</link>
            <description>Which came first -- the chicken or the egg? Listen in as Marshall Brain gives the technical answer -- and takes a look at the science behind eggshell formation -- in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-11-brainstuff-egg-shells.mp3' length='718230' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 11 Mar 2009 12:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1236367757385hsw-brainstuff-egg-shells.mp3</guid>
            <itunes:duration>00:01:23</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, egg shells, eggs, chicken, egg formation</itunes:keywords>
            <itunes:subtitle>Which came first -- the chicken or the egg? Listen in as Marshall Brain gives the technical answer -- and takes a look at the science behind eggshell formation -- in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Are florescent bulbs really more efficient?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-09-brainstuff-bulb-efficiency.mp3</link>
            <description>Customers are increasingly choosing long-lasting alternatives to traditional incandescent lights. But are florescent lightbulbs really more efficient than traditional lightbulbs? Listen in and find out in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-09-brainstuff-bulb-efficiency.mp3' length='596024' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 09 Mar 2009 12:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1236367688262hsw-brainstuff-bulb-efficiency.mp3</guid>
            <itunes:duration>00:01:10</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, florescent lightbulb, light bulb efficiency</itunes:keywords>
            <itunes:subtitle>Customers are increasingly choosing long-lasting alternatives to traditional incandescent lights. But are florescent lightbulbs really more efficient than traditional lightbulbs? Listen in and find out in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Car Thermostats Work</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-06-brainstuff-car-themostat.mp3</link>
            <description>Any liquid-cooled car engine has a thermostat that blocks the flow of coolant to the radiator. Learn how the thermostat works to reduce wear, deposits and emissions in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-06-brainstuff-car-themostat.mp3' length='1102390' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 06 Mar 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1236194037623hsw-brainstuff-car-themostat.mp3</guid>
            <itunes:duration>00:02:04</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, car thermostat, car temperature, automobile thermostat</itunes:keywords>
            <itunes:subtitle>Any liquid-cooled car engine has a thermostat that blocks the flow of coolant to the radiator. Learn how the thermostat works to reduce wear, deposits and emissions in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why can boats float on water?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-04-brainstuff-boat-float.mp3</link>
            <description>If a boat weighs 1,000 pounds, it will sink into the water until it displaces 1,000 pounds of water. Tune in to learn how the shape of a boat allows it to displace enough water to float in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-04-brainstuff-boat-float.mp3' length='1598439' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 04 Mar 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1236022322232hsw-brainstuff-boat-float.mp3</guid>
            <itunes:duration>00:03:02</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, boat float, how do boats float?</itunes:keywords>
            <itunes:subtitle>If a boat weighs 1,000 pounds, it will sink into the water until it displaces 1,000 pounds of water. Tune in to learn how the shape of a boat allows it to displace enough water to float in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How the Virtual First-Down Line Works</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-02-brainstuff-first-down-line1.mp3</link>
            <description>Virtual first down lines are used to indicate where play resumes in football -- but how do they work? Listen in as Marshall Brain explains how the technology superimposes a virtual line in this podcast on HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-03-02-brainstuff-first-down-line1.mp3' length='1761888' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 02 Mar 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1235753277550hsw-brainstuff-first-down-line1.mp3</guid>
            <itunes:duration>00:03:23</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, virtual first down line, first down, football</itunes:keywords>
            <itunes:subtitle>Virtual first down lines are used to indicate where play resumes in football -- but how do they work? Listen in as Marshall Brain explains how the technology superimposes a virtual line in this podcast on HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does hemp work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-27-brainstuff-hemp.mp3</link>
            <description>Hemp fibers are coarse and strong, perfect for things like rope -- hemp is also more environmentally friendly than many other crops. Listen in as Marshall Brain takes a look at the controversy surrounding hemp in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-27-brainstuff-hemp.mp3' length='1315512' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 27 Feb 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1235161079242hsw-brainstuff-hemp.mp3</guid>
            <itunes:duration>00:02:30</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, hemp, marijuana, hemp fibers, hemp clothing, brainstuff</itunes:keywords>
            <itunes:subtitle>Hemp fibers are coarse and strong, perfect for things like rope -- hemp is also more environmentally friendly than many other crops. Listen in as Marshall Brain takes a look at the controversy surrounding hemp in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What  is dioxin?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-25-brainstuff-dioxin.mp3</link>
            <description>Dioxin is an organic chemical that consists of benzene, oxygen and chlorine. This chemical is also toxic. Tune in to learn more about dioxin and Agent Orange in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-25-brainstuff-dioxin.mp3' length='1198057' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 25 Feb 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1235160624439hsw-brainstuff-dioxin.mp3</guid>
            <itunes:duration>00:02:19</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, dioxin, agent orange, DDT, toxic chemicals, dioxin toxicity</itunes:keywords>
            <itunes:subtitle>Dioxin is an organic chemical that consists of benzene, oxygen and chlorine. This chemical is also toxic. Tune in to learn more about dioxin and Agent Orange in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do bake and broil settings differ?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-23-brainstuff-bake-v-broil.mp3</link>
            <description>Kitchen ovens typically have two settings: bake and broil. What's the difference between the two? Explore the science behind baking and broiling in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-23-brainstuff-bake-v-broil.mp3' length='1583524' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 23 Feb 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1235154144698hsw-brainstuff-bake-v-broil.mp3</guid>
            <itunes:duration>00:03:00</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, oven, bake, broil, hot air, preheat, infrared radiation, grill, broiler</itunes:keywords>
            <itunes:subtitle>Kitchen ovens typically have two settings: bake and broil. What's the difference between the two? Explore the science behind baking and broiling in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Activated Charcoal Works</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-20-brainstuff-activated-charcoal.mp3</link>
            <description>If you look on the label of a water filter, you'll often see the filter contains activated charcoal -- but what exactly is this stuff? Tune in as Marshall Brain explains the nature of activated charcoal in this podcast from HowStuffWorks.com.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-20-brainstuff-activated-charcoal.mp3' length='2391733' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 20 Feb 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1235069164274hsw-brainstuff-activated-charcoal.mp3</guid>
            <itunes:duration>00:01:54</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, charcoal water filter, activated charcoal, charcoal filtration</itunes:keywords>
            <itunes:subtitle>If you look on the label of a water filter, you'll often see the filter contains activated charcoal -- but what exactly is this stuff? Tune in as Marshall Brain explains the nature of activated charcoal in this podcast from HowStuffWorks.com.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do astronomers measure distance?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-18-brainstuff-distance-to-star.mp3</link>
            <description>Since astronomers cannot actually travel to a star, they rely on two ingenious methods to measure a star's distance from earth. Listen in as Marshall Brain breaks down the science of space measurement in this podcast from HowStuffWorks.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-18-brainstuff-distance-to-star.mp3' length='1032830' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 18 Feb 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1234891250403hsw-brainstuff-distance-to-star.mp3</guid>
            <itunes:duration>00:01:59</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, distance from earth, star distance, parallax</itunes:keywords>
            <itunes:subtitle>Since astronomers cannot actually travel to a star, they rely on two ingenious methods to measure a star's distance from earth. Listen in as Marshall Brain breaks down the science of space measurement in this podcast from HowStuffWorks.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do hurricanes follow such peculiar tracks?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-16-brainstuff-hurricane-tracks.mp3</link>
            <description>Hurricanes are enormously destructive, and sometimes seem to have a mind of their own. Tune in to this HowStuffWorks podcast to learn more about hurricanes.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-16-brainstuff-hurricane-tracks.mp3' length='1042558' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 16 Feb 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1234546817949hsw-brainstuff-hurricane-tracks.mp3</guid>
            <itunes:duration>00:01:58</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, hurricanes, hurricane movement, tropical storm, formation of hurricanes</itunes:keywords>
            <itunes:subtitle>Hurricanes are enormously destructive, and sometimes seem to have a mind of their own. Tune in to this HowStuffWorks podcast to learn more about hurricanes.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How big is the universe?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-13-brainstuff-mass-of-universe.mp3</link>
            <description>If all the matter in the universe was pushed into one corner, how much space would it take up? Listen in as Marshall Brain explores the size of the universe in this podcast from HowStuffWorks.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-13-brainstuff-mass-of-universe.mp3' length='1229944' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 13 Feb 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1234460598290hsw-brainstuff-mass-of-universe.mp3</guid>
            <itunes:duration>00:02:24</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, mass of universe, how big is the universe?</itunes:keywords>
            <itunes:subtitle>If all the matter in the universe was pushed into one corner, how much space would it take up? Listen in as Marshall Brain explores the size of the universe in this podcast from HowStuffWorks.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does SETI at home work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-11-brainstuff-seti.mp3</link>
            <description>SETI -- the Search for Extraterrestrial Intelligence -- is an enormous, global undertaking meant to detect signs of life beyond our solar system. Learn how you can help from home in this podcast from HowStuffWorks.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-11-brainstuff-seti.mp3' length='1899192' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 11 Feb 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1234282130011hsw-brainstuff-seti.mp3</guid>
            <itunes:duration>00:03:39</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks,  brainstuff, seti, satellite, SETI at home</itunes:keywords>
            <itunes:subtitle>SETI -- the Search for Extraterrestrial Intelligence -- is an enormous, global undertaking meant to detect signs of life beyond our solar system. Learn how you can help from home in this podcast from HowStuffWorks.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How often do state quarters come out?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-09-brainstuff-state-quarters.mp3</link>
            <description>A new state quarter is released about every ten weeks, and they're released according to the order in which each state joined the union. Learn more about state quarters in this podcast from HowStuffWorks.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-09-brainstuff-state-quarters.mp3' length='781609' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 09 Feb 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1233950304870hsw-brainstuff-state-quarters.mp3</guid>
            <itunes:duration>00:01:29</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, state quarters, how quarters work,</itunes:keywords>
            <itunes:subtitle>A new state quarter is released about every ten weeks, and they're released according to the order in which each state joined the union. Learn more about state quarters in this podcast from HowStuffWorks.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What do the ul marks on so many products mean?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-06-brainstuff-ul-mark.mp3</link>
            <description>UL stands for 'underwriters laboratories,' a safety testing organization -- but what exactly does this group do, and why do they do it? Tune in and learn more about the UL mark in this podcast from HowStuffWorks.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-06-brainstuff-ul-mark.mp3' length='766209' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 06 Feb 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1233866351737hsw-brainstuff-ul-mark.mp3</guid>
            <itunes:duration>00:01:26</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, UL, underwriter's laboratories, branding, food safety</itunes:keywords>
            <itunes:subtitle>UL stands for 'underwriters laboratories,' a safety testing organization -- but what exactly does this group do, and why do they do it? Tune in and learn more about the UL mark in this podcast from HowStuffWorks.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What does the VTEC system do?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-04-brainstuff-vtec.mp3</link>
            <description>Every gasoline engine has valves that work with the camshaft to let air into and out of the engine. Learn how VTEC -- Variable Valve Timing and Lift Electronic Control -- allows engines to adapt their camshafts in this HowStuffWorks podcast.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-04-brainstuff-vtec.mp3' length='1178113' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 04 Feb 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1233695231574hsw-brainstuff-vtec.mp3</guid>
            <itunes:duration>00:02:15</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, howstuffworks, v-tec, what is v-tec, how vtec works</itunes:keywords>
            <itunes:subtitle>Every gasoline engine has valves that work with the camshaft to let air into and out of the engine. Learn how VTEC -- Variable Valve Timing and Lift Electronic Control -- allows engines to adapt their camshafts in this HowStuffWorks podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is silica gel?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-02-brainstuff-silica-gel.mp3</link>
            <description>Everyone's familiar with those little packets of silicate gel, found in thousands of products -- but what exactly do they do? Check out this HowStuffWorks podcast and learn more about silica gel.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-02-02-brainstuff-silica-gel.mp3' length='900604' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 02 Feb 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1233335661445hsw-brainstuff-silica-gel.mp3</guid>
            <itunes:duration>00:01:43</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks,  brainstuff, silica gel, desiccant</itunes:keywords>
            <itunes:subtitle>Everyone's familiar with those little packets of silicate gel, found in thousands of products -- but what exactly do they do? Check out this HowStuffWorks podcast and learn more about silica gel.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why doesn't the vacuum of space suck away Earth's atmosphere?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-30-brainstuff-vacuum.mp3</link>
            <description>It's often said that &quot;nature abhores a vacuum.&quot; If that's true, then why doesn't the vacuum of space suck away our atmosphere? Tune in as Marshall Brain explains the science behind vacuums in this HowStuffWorks podcast.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-30-brainstuff-vacuum.mp3' length='1501920' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 30 Jan 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1233170887984hsw-brainstuff-vacuum.mp3</guid>
            <itunes:duration>00:02:50</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, vacuum, space, brainstuff, atomspheric pressure, vacuum of space</itunes:keywords>
            <itunes:subtitle>It's often said that &quot;nature abhores a vacuum.&quot; If that's true, then why doesn't the vacuum of space suck away our atmosphere? Tune in as Marshall Brain explains the science behind vacuums in this HowStuffWorks podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can I gain pounds during the day and lose them at night?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-28-brainstuff-water-weight.mp3</link>
            <description>Water is a very heavy substance -- just one galloon weighs 8 pounds. Check out this HowStuffWorks podcast to learn more about how the passage of water affects your weight.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-28-brainstuff-water-weight.mp3' length='952522' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 28 Jan 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1233084019533hsw-brainstuff-water-weight.mp3</guid>
            <itunes:duration>00:01:50</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, brain stuff, howstuffworks, water weight, weight fluctuation</itunes:keywords>
            <itunes:subtitle>Water is a very heavy substance -- just one galloon weighs 8 pounds. Check out this HowStuffWorks podcast to learn more about how the passage of water affects your weight.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What's the total amount of gold in the world?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-26-brainstuff-amount-of-gold.mp3</link>
            <description>Have you ever wondered how much gold the world has produced over time? How about platinum? Get the grand totals in this HowStuffWorks podcast.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-26-brainstuff-amount-of-gold.mp3' length='1850378' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 26 Jan 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1232040367163hsw-brainstuff-amount-of-gold.mp3</guid>
            <itunes:duration>00:03:32</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, gold, amount, troy ounce, kilogram, liter, aztecs, washington monument, platinum</itunes:keywords>
            <itunes:subtitle>Have you ever wondered how much gold the world has produced over time? How about platinum? Get the grand totals in this HowStuffWorks podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What type of gas do racecars use?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-23-brainstuff-race-gas.mp3</link>
            <description>Different types of racing vehicles require different types of fuel. Check out this HowStuffWorks podcast to learn more about the advantages and drawbacks of each fuel type.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-23-brainstuff-race-gas.mp3' length='709218' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 23 Jan 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1231535083840hsw-brainstuff-race-gas.mp3</guid>
            <itunes:duration>00:01:21</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, howstuffworks, race car gas, petroleum, ethanol, dragster fuel, racing fuel</itunes:keywords>
            <itunes:subtitle>Different types of racing vehicles require different types of fuel. Check out this HowStuffWorks podcast to learn more about the advantages and drawbacks of each fuel type.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What do those plastic recycling symbols means?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-21-brainstuff-plastic-recycling.mp3</link>
            <description>A typical recycling symbol on plastic looks like a triangle made of arrows. There are seven different types of plastic indicated by the symbols. Check out this HowStuffWorks podcast to learn the difference between each of these plastic types.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-21-brainstuff-plastic-recycling.mp3' length='1326056' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 21 Jan 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1231535038895hsw-brainstuff-plastic-recycling.mp3</guid>
            <itunes:duration>00:02:31</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, howstuffworks, recycling, plastic recycling, types of plastic</itunes:keywords>
            <itunes:subtitle>A typical recycling symbol on plastic looks like a triangle made of arrows. There are seven different types of plastic indicated by the symbols. Check out this HowStuffWorks podcast to learn the difference between each of these plastic types.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What's in mothballs?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-19-brainstuff-moth-balls.mp3</link>
            <description>There are two different types of mothballs, each of which contains separate moth-killing ingredients. Tune in as Marshall Brain explains the science behind mothballs in this podcast from HowStuffWorks.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-19-brainstuff-moth-balls.mp3' length='1131167' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 19 Jan 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1231534990654hsw-brainstuff-moth-balls.mp3</guid>
            <itunes:duration>00:02:09</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, howstuffworks, mothballs, moth balls, clothing, mothball fumes</itunes:keywords>
            <itunes:subtitle>There are two different types of mothballs, each of which contains separate moth-killing ingredients. Tune in as Marshall Brain explains the science behind mothballs in this podcast from HowStuffWorks.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is the heat index?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-16-brainstuff-heat-index.mp3</link>
            <description>Your body has efficient ways to release excess heat, but high temperatures and high humidity create a sticky situation. Find out how the heat index keeps you abreast of dangerous heat situations in this HowStuffWorks podcast.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-16-brainstuff-heat-index.mp3' length='1215537' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 16 Jan 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1231532662492hsw-brainstuff-heat-index.mp3</guid>
            <itunes:duration>00:02:21</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, heat, index, heat index, heat, cooling, evaporative, sweat, humidity, weather</itunes:keywords>
            <itunes:subtitle>Your body has efficient ways to release excess heat, but high temperatures and high humidity create a sticky situation. Find out how the heat index keeps you abreast of dangerous heat situations in this HowStuffWorks podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why do your ears pop when you dive in a deep pool?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-14-brainstuff-ears-in-pool.mp3</link>
            <description>Have you ever wondered why your ears pop when you plunge into the deep end of a swimming pool? It's all about keeping your ear drum happy, as this HowStuffWorks podcast reveals.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-14-brainstuff-ears-in-pool.mp3' length='1420763' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 14 Jan 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1231532591287hsw-brainstuff-ears-in-pool.mp3</guid>
            <itunes:duration>00:02:39</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, ears, pool, ear canal, ear drum, middle ear, Eustachian tube</itunes:keywords>
            <itunes:subtitle>Have you ever wondered why your ears pop when you plunge into the deep end of a swimming pool? It's all about keeping your ear drum happy, as this HowStuffWorks podcast reveals.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How do you make clear ice cubes?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-12-brainstuff-clear-ice.mp3</link>
            <description>What makes some ice cloudy and some perfectly clear? Discover the answer and learn how to make your own batch of clear cubes in this HowStuffWorks podcast.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-12-brainstuff-clear-ice.mp3' length='722608' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 12 Jan 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1231531745231hsw-brainstuff-clear-ice.mp3</guid>
            <itunes:duration>00:01:24</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, clear, ice, ice cubes, layers, pure, water, icemaker, distilled water</itunes:keywords>
            <itunes:subtitle>What makes some ice cloudy and some perfectly clear? Discover the answer and learn how to make your own batch of clear cubes in this HowStuffWorks podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How many balloons would it take to life someone off the ground?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-09-brainstuff-lift-with-balloons.mp3</link>
            <description>Balloons are often filled with helium, which has a lifting force of one gram per meter. It's possible to assemble enough balloons to lift yourself from the ground -- but how many balloons does it take? Tune into this HowStuffWorks podcast to learn more.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-09-brainstuff-lift-with-balloons.mp3' length='887802' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 09 Jan 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1231430857469hsw-brainstuff-lift-with-balloons.mp3</guid>
            <itunes:duration>00:01:42</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, brain stuff, howstuffworks, helium balloons, how many balloons will lift me</itunes:keywords>
            <itunes:subtitle>Balloons are often filled with helium, which has a lifting force of one gram per meter. It's possible to assemble enough balloons to lift yourself from the ground -- but how many balloons does it take? Tune into this HowStuffWorks podcast to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How does chlorine bleach work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-07-brainstuff-bleach.mp3</link>
            <description>When you buy a gallon of bleach at the grocery store, what are you actually purchasing? Check out this HowStuffWorks podcast to learn more about bleach, chlorine and the chemical reactions behind these products.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-07-brainstuff-bleach.mp3' length='1310348' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 07 Jan 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2009/1231185343836hsw-brainstuff-bleach.mp3</guid>
            <itunes:duration>00:02:29</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, brainstuff, brain stuff, bleach, chlorine, chlorine beach</itunes:keywords>
            <itunes:subtitle>When you buy a gallon of bleach at the grocery store, what are you actually purchasing? Check out this HowStuffWorks podcast to learn more about bleach, chlorine and the chemical reactions behind these products.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Can water go bad?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-05-brainstuff-bad-water.mp3</link>
            <description>Many people store water for emergencies -- but is it true that water sitting for too long will go bad? Listen in as Marshall Brain breaks down the science of water purification in this HowStuffWorks podcast.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-05-brainstuff-bad-water.mp3' length='1023082' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 05 Jan 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1230740404523hsw-brainstuff-bad-water.mp3</guid>
            <itunes:duration>00:01:57</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, brain stuff, water, can water go bad, water contamination, purified water, wells, emergency water</itunes:keywords>
            <itunes:subtitle>Many people store water for emergencies -- but is it true that water sitting for too long will go bad? Listen in as Marshall Brain breaks down the science of water purification in this HowStuffWorks podcast.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How can you figure out how far away lightning struck?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-02-brainstuff-lightning-distance.mp3</link>
            <description>Check out this podcast from HowStuffWorks to learn how to gauge the distance of a lightning strike with a simple equation.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2009-01-02-brainstuff-lightning-distance.mp3' length='863560' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 02 Jan 2009 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1229712926896hsw-brainstuff-lightning-distance.mp3</guid>
            <itunes:duration>00:01:38</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, howstuffworks, lightning, calculate lightning, thunder</itunes:keywords>
            <itunes:subtitle>Check out this podcast from HowStuffWorks to learn how to gauge the distance of a lightning strike with a simple equation.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What's the difference between LPG or natural gas?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-31-brainstuff-lpg-vs-ng.mp3</link>
            <description>Since liquefied petroleum gas and natural gas have very different properties, it's always important to specify which substance you will use when buying an appliance. Check out this podcast from HowStuffWorks to learn more.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-31-brainstuff-lpg-vs-ng.mp3' length='1286836' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 31 Dec 2008 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1229712869939hsw-brainstuff-lpg-vs-ng.mp3</guid>
            <itunes:duration>00:02:27</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, howstuffworks, liquefied petroleum gas, natural gas</itunes:keywords>
            <itunes:subtitle>Since liquefied petroleum gas and natural gas have very different properties, it's always important to specify which substance you will use when buying an appliance. Check out this podcast from HowStuffWorks to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Why is carbon monoxide so poisonous?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-29-brainstuff-carbon-monoxide.mp3</link>
            <description>The structure of hemoglobin causes oxygen to bind loosely to iron -- however, carbon monoxide binds very tightly to the blood's iron, reducing your ability to breathe. Check out this podcast from HowStuffWorks to learn more.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-29-brainstuff-carbon-monoxide.mp3' length='996433' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 29 Dec 2008 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1229712790251hsw-brainstuff-carbon-monoxide.mp3</guid>
            <itunes:duration>00:01:52</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, howstuffworks, carbon monoxide, pollution, asphyxiation</itunes:keywords>
            <itunes:subtitle>The structure of hemoglobin causes oxygen to bind loosely to iron -- however, carbon monoxide binds very tightly to the blood's iron, reducing your ability to breathe. Check out this podcast from HowStuffWorks to learn more.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Botulism Works</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-26-brainstuff-botulism.mp3</link>
            <description>Botulism bacteria creates a type of poisoning and paralysis. Check out this HowStuffWorks podcast to learn more about the effects and spread of botulism.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-26-brainstuff-botulism.mp3' length='1219085' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 26 Dec 2008 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1229712710657hsw-brainstuff-botulism.mp3</guid>
            <itunes:duration>00:02:20</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, howstuffworks, botulism, canned food, botulin, honey</itunes:keywords>
            <itunes:subtitle>Botulism bacteria creates a type of poisoning and paralysis. Check out this HowStuffWorks podcast to learn more about the effects and spread of botulism.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is the ideal temperature for a refrigerator?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-24-brainstuff-refrig-temp.mp3</link>
            <description>The purpose of a refrigerator is to slow the growth of bacteria -- since some foods don't freeze well, they can't be placed in a freezer. Check out this HowStuffWorks podcast to learn the ideal temperature for your refrigerator.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-24-brainstuff-refrig-temp.mp3' length='679761' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 24 Dec 2008 13:00:00 GMT</pubDate>
            <author>mbrain@howstuffworks.com (Marshall Brain, HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1229117000843hsw-brainstuff-refrig-temp.mp3</guid>
            <itunes:duration>00:01:19</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, brain stuff, howstuffworks, how stuff works,</itunes:keywords>
            <itunes:subtitle>The purpose of a refrigerator is to slow the growth of bacteria -- since some foods don't freeze well, they can't be placed in a freezer. Check out this HowStuffWorks podcast to learn the ideal temperature for your refrigerator.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Does adding RAM make a computer faster?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-22-brainstuff-ram.mp3</link>
            <description>Adding random access memory -- or RAM -- to your computer can, to a degree, make the machine faster. Check out this podcast from HowStuffWorks to learn how RAM affects your computer.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-22-brainstuff-ram.mp3' length='1580264' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 22 Dec 2008 13:00:00 GMT</pubDate>
            <author>mbrain@howstuffworks.com (Marshall Brain, HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1229116943854hsw-brainstuff-ram.mp3</guid>
            <itunes:duration>00:03:00</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, brain stuff, howstuffworks, how stuff works, random access memory, ram, computer</itunes:keywords>
            <itunes:subtitle>Adding random access memory -- or RAM -- to your computer can, to a degree, make the machine faster. Check out this podcast from HowStuffWorks to learn how RAM affects your computer.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What does 'octane' mean?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-19-brainstuff-octane.mp3</link>
            <description>The octane rating of gasoline indicates how much a fuel can be compressed before it ignites. When gas ignites due to compression, knocking occurs within the engine. Check out this HowStuffWorks podcast to learn more about octane and engines.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-19-brainstuff-octane.mp3' length='1448118' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 19 Dec 2008 13:00:00 GMT</pubDate>
            <author>mbrain@howstuffworks.com (Marshall Brain, HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1229116892223hsw-brainstuff-octane.mp3</guid>
            <itunes:duration>00:02:43</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, brain stuff, howstuffworks, how stuff works, octane, fuel</itunes:keywords>
            <itunes:subtitle>The octane rating of gasoline indicates how much a fuel can be compressed before it ignites. When gas ignites due to compression, knocking occurs within the engine. Check out this HowStuffWorks podcast to learn more about octane and engines.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Contrails Work</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-17-brainstuff-contrail.mp3</link>
            <description>The clouds that some jets form on certain days are called condensation trails -- or contrails. Check out this HowStuffWorks podcast to learn more about condensation, weather and jets.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-17-brainstuff-contrail.mp3' length='1005196' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 17 Dec 2008 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1228835933043hsw-brainstuff-contrail.mp3</guid>
            <itunes:duration>00:01:55</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, brain stuff, howstuffworks, how stuff works, contrails, condensation trails, condensation</itunes:keywords>
            <itunes:subtitle>The clouds that some jets form on certain days are called condensation trails -- or contrails. Check out this HowStuffWorks podcast to learn more about condensation, weather and jets.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Vacuums Work</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-15-brainstuff-vacuum-balloon.mp3</link>
            <description>If a balloon was filled by a vacuum -- rather than helium or air -- would it float? Check out this HowStuffWorks podcast to learn the science behind balloons and vacuum.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-15-brainstuff-vacuum-balloon.mp3' length='1022872' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 15 Dec 2008 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1228835446293hsw-brainstuff-vacuum-balloon.mp3</guid>
            <itunes:duration>00:01:58</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, brain stuff, howstuffworks, how stuff works, vacuum, ballon, vacuum balloon, helium balloon</itunes:keywords>
            <itunes:subtitle>If a balloon was filled by a vacuum -- rather than helium or air -- would it float? Check out this HowStuffWorks podcast to learn the science behind balloons and vacuum.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What is an MRE?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-12-brainstuff-mre.mp3</link>
            <description>An MRE -- or meal ready to eat -- contains precooked, sterilized food originally made to nourish soldiers. Check out this HowStuffWorks podcast to learn more about the retort packaging that makes MREs possible.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-12-brainstuff-mre.mp3' length='750623' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 12 Dec 2008 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1228835391429hsw-brainstuff-mre.mp3</guid>
            <itunes:duration>00:01:27</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, brain stuff, howstuffworks, how stuff works, meal ready to eat, MRE, packaged food</itunes:keywords>
            <itunes:subtitle>An MRE -- or meal ready to eat -- contains precooked, sterilized food originally made to nourish soldiers. Check out this HowStuffWorks podcast to learn more about the retort packaging that makes MREs possible.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Diaper Crystals Work</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-10-brainstuff-diaper-crystals.mp3</link>
            <description>Most disposable diapers contain a crystalline, absorbent substance called sodium polyacrylate. Learn how this polymer helps contain messes -- and some of the controversy surrounding this substance -- in this podcast from HowStuffWorks.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-10-brainstuff-diaper-crystals.mp3' length='814989' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 10 Dec 2008 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1228835337049hsw-brainstuff-diaper-crystals.mp3</guid>
            <itunes:duration>00:01:35</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, brain stuff, howstuffworks, how stuff works, sodium polyacrylate, disposable diaper, diaper, diaper crystals</itunes:keywords>
            <itunes:subtitle>Most disposable diapers contain a crystalline, absorbent substance called sodium polyacrylate. Learn how this polymer helps contain messes -- and some of the controversy surrounding this substance -- in this podcast from HowStuffWorks.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Case Hardening Works</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-08-brainstuff-case-harden.mp3</link>
            <description>Steel is an amazing metal. Many different varieties of steel exist, and some types of steel are better for certain tasks. Check out this HowStuffWorks podcast to learn how case hardening allows manufactures to get the best of multiple types of steel.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-08-brainstuff-case-harden.mp3' length='858719' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 08 Dec 2008 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1228505878716hsw-brainstuff-case-harden.mp3</guid>
            <itunes:duration>00:01:41</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brainstuff, brain stuff, case harden, steel, case hardening, steel alloy</itunes:keywords>
            <itunes:subtitle>Steel is an amazing metal. Many different varieties of steel exist, and some types of steel are better for certain tasks. Check out this HowStuffWorks podcast to learn how case hardening allows manufactures to get the best of multiple types of steel.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Inkjet Printers Work</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-05-brainstuff-inkjet.mp3</link>
            <description>Inkjet printers shoot extremely small droplets of ink -- thirty dots per millimeter or more -- onto paper to produce a picture. Check out this HowStuffWorks podcast to learn more about inkjet printers.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-05-brainstuff-inkjet.mp3' length='791060' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 05 Dec 2008 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1227647544170hsw-brainstuff-inkjet.mp3</guid>
            <itunes:duration>00:01:30</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, hsw, brainstuff, brain stuff, inkjet</itunes:keywords>
            <itunes:subtitle>Inkjet printers shoot extremely small droplets of ink -- thirty dots per millimeter or more -- onto paper to produce a picture. Check out this HowStuffWorks podcast to learn more about inkjet printers.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Polygraph Machines Work</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-03-brainstuff-polygraph.mp3</link>
            <description>Also known as 'lie detectors,' polygraphs are used to record an individual's vital signs, such as breathing rate, pulse, and so forth. Check out this podcast from HowStuffWorks to learn more about polygraphs and the art of lie detection.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-03-brainstuff-polygraph.mp3' length='1074106' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 03 Dec 2008 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1227647492852hsw-brainstuff-polygraph.mp3</guid>
            <itunes:duration>00:02:04</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, hsw, brain stuff, brainstuff, polygraph, lie detector</itunes:keywords>
            <itunes:subtitle>Also known as 'lie detectors,' polygraphs are used to record an individual's vital signs, such as breathing rate, pulse, and so forth. Check out this podcast from HowStuffWorks to learn more about polygraphs and the art of lie detection.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How V-chips Work</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-01-brainstuff-vchip.mp3</link>
            <description>As of 1999, all TV sets sold in the Untied States are required to contain a viewer-control chip, also known as a v-chip. Check out this HowStuffWorks podcast to learn more about v-chips and television ratings.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-12-01-brainstuff-vchip.mp3' length='1239559' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 01 Dec 2008 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1227647430613hsw-brainstuff-vchip.mp3</guid>
            <itunes:duration>00:02:22</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, hsw, brainstuff, brain stuff, vchip,</itunes:keywords>
            <itunes:subtitle>As of 1999, all TV sets sold in the Untied States are required to contain a viewer-control chip, also known as a v-chip. Check out this HowStuffWorks podcast to learn more about v-chips and television ratings.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Replacing Toilets Works</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-11-28-brainstuff-replace-toilets.mp3</link>
            <description>A family of four can consume more than 300 galloons of water per day. Old toilets use 5 galloons per flush, and this water use quickly adds up. Check out this HowStuffWorks podcast and learn why cities across the US are replacing their old commodes.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-11-28-brainstuff-replace-toilets.mp3' length='899997' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 28 Nov 2008 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1227126109190hsw-brainstuff-replace-toilets.mp3</guid>
            <itunes:duration>00:01:44</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, brain stuff, toilets, toilet, commode</itunes:keywords>
            <itunes:subtitle>A family of four can consume more than 300 galloons of water per day. Old toilets use 5 galloons per flush, and this water use quickly adds up. Check out this HowStuffWorks podcast and learn why cities across the US are replacing their old commodes.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>Can I see the stuff astronauts left on the moon?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-11-26-brainstuff-moon-telescope.mp3</link>
            <description>Using a telescope to view the moon is fascinating -- but could we see the leftovers of NASA's lunar expeditions? Check out this HowStuffWorks podcast to learn more about lunar landings and telescopes.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-11-26-brainstuff-moon-telescope.mp3' length='753603' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 26 Nov 2008 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1227126044328hsw-brainstuff-moon-telescope.mp3</guid>
            <itunes:duration>00:01:27</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, brain stuff, astronomy, space, moon telescope, lunar telescope, NASA</itunes:keywords>
            <itunes:subtitle>Using a telescope to view the moon is fascinating -- but could we see the leftovers of NASA's lunar expeditions? Check out this HowStuffWorks podcast to learn more about lunar landings and telescopes.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How the Horizon Works</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-11-24-brainstuff-horizon.mp3</link>
            <description>When you stand at the water's edge and look out toward the horizon, how far away can you actually see? Check out this HowStuffWorks podcast to learn more about the horizon and the curvature of Earth.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-11-24-brainstuff-horizon.mp3' length='621305' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Mon, 24 Nov 2008 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1227125995212hsw-brainstuff-horizon.mp3</guid>
            <itunes:duration>00:01:12</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, brain stuff, horizon, perspective</itunes:keywords>
            <itunes:subtitle>When you stand at the water's edge and look out toward the horizon, how far away can you actually see? Check out this HowStuffWorks podcast to learn more about the horizon and the curvature of Earth.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How much fuel does an international airplane use for a trip?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-11-21-brainstuff-airplane-mileage.mp3</link>
            <description>A Boeing 747 uses approximately one galloon of fuel per second -- over the course of a ten hour flight, it might burn 36,00 galloons of fuel. How does this compare to a car? Check out this HowStuffWorks podcast to learn more about airplane mileage.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-11-21-brainstuff-airplane-mileage.mp3' length='819730' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Fri, 21 Nov 2008 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1227034227768hsw-brainstuff-airplane-mileage.mp3</guid>
            <itunes:duration>00:01:35</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>howstuffworks, how stuff works, brainstuff, brain stuff, airplane mileage, airplane, aircraft, airplane fuel</itunes:keywords>
            <itunes:subtitle>A Boeing 747 uses approximately one galloon of fuel per second -- over the course of a ten hour flight, it might burn 36,00 galloons of fuel. How does this compare to a car? Check out this HowStuffWorks podcast to learn more about airplane mileage.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>What are MP3 files and how do they work?</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-11-19-brainstuff-mp3.mp3</link>
            <description>CDs store music using 44,100 16-bit digital samples per second, adding up to about 10 megabytes per minute -- and that's too large to move easily move across the internet. Check out this HowStuffWorks podcast to learn how MP3 files solve this problem.</description>
            <enclosure url='http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008-11-19-brainstuff-mp3.mp3' length='1105589' type='audio/x-mpeg' />
            <category>Science &amp; Medicine</category>
            <pubDate>Wed, 19 Nov 2008 13:00:00 GMT</pubDate>
            <author>podcast@howstuffworks.com (HowStuffWorks.com)</author>
            <guid>http://netstorage.discovery.com/DMC-FEEDS/MED/podcasts/2008/1227034165326hsw-brainstuff-mp3.mp3</guid>
            <itunes:duration>00:02:06</itunes:duration>
            <itunes:explicit>no</itunes:explicit>
            <itunes:keywords>brain stuff, brainstuff, mp3, electronic music, digital music, howstuffworks, how stuff works</itunes:keywords>
            <itunes:subtitle>CDs store music using 44,100 16-bit digital samples per second, adding up to about 10 megabytes per minute -- and that's too large to move easily move across the internet. Check out this HowStuffWorks podcast to learn how MP3 files solve this problem.</itunes:subtitle>
            <itunes:author>HowStuffWorks.com</itunes:author>
        </item>
        <item>
            <title>How Sea Monkeys Work</title>
            <link>http://podcasts.howstuffworks.com/hsw/podcasts/brainstuff/2008