Today's Mindblower

Will orbital chaos cause Earth, Venus and Mars to collide?

It's not a pleasant thought, is it? But when you mix chaos theory with a few crazy cosmologists, those tidy, predictable orbits start getting lively.

    • How Hackers Work

      computer

      How Hackers Work

      Hackers have been attacking Adobe Acrobat 9 on Windows after a critical security vulnerability was found. Take a look at hacker culture and the various kinds of hackers, some of whom have run afoul of the law.

    • How U.S. Criminal Records Work

      people

      How U.S. Criminal Records Work

      Former Penn State assistant football coach Jerry Sandusky was arrested and jailed Wednesday on new child sex abuse charges. Every arrest and conviction goes on a criminal record, which is stored in massive computer databases that are accessible throughout the world. Once you have a criminal record, will it ever go away?

    • What would it take to reverse global warming?

      science

      What would it take to reverse global warming?

      The two largest producers of carbon dioxide emissions, the U.S. and China, butted heads again this week at the U.N. climate talks. Most scientists agree that human interference in the environment has something to do with the recent trend of rising temperatures on the Earth. What can we do about it?

    • Top 5 Myths About Apple

      electronics

      Top 5 Myths About Apple

      Apple opens its new flagship store in Grand Central Terminal in New York City today. Apple is one of the most successful companies around -- and one of the most mysterious. Here, we consider and debunk five of the biggest myths surrounding this tech giant.

    • Does the Higgs boson exist?

      science

      Does the Higgs boson exist?

      The European Organization for Nuclear Research (CERN) is providing an update on the search for the Higgs boson particle next week on Dec. 13. Rumors say it has been found, but does it even exist?

    • Top 10 Tips for Having a Good Flight

      adventure

      Top 10 Tips for Having a Good Flight

      Some things prevent flying from being fun -- small seats, crowded legroom, snoring seatmates and having to go back to the gate when Alec Baldwin is on your flight and won’t turn off his electronics. See these tips so you can make flying easier for everyone.

    • How Plug-in Hybrid Cars Work

      auto

      How Plug-in Hybrid Cars Work

      GM continues to work with the government to determine the cause of Chevy Volt fires. Learn all about plug-in hybrid cars including their battery packs, which have been under investigation.

    • You Should Know Video: Transplants, Physics and the Moon

      videos

      You Should Know Video: Transplants, Physics and the Moon

      It's no secret that Josh and Chuck are knowledge junkies -- but how much can they learn in 60 seconds? In this playlist, the guys tackle everything from fecal transplants to frame of reference physics and theoretical journeys to the center of the moon.

    • How Lying Works

      people

      How Lying Works

      Former U.S. Governor Rod Blagojevich was sentenced to 14 years in prison on Wednesday after jurors agreed that he lied to the FBI and found him guilty in 18 corruption charges. Do you know how to spot a lie?

    • How Suicide Bombers Work

      science

      How Suicide Bombers Work

      A suicide bombing in Afghanistan on Tuesday killed dozens of people outside a Shiite shrine. Are these bombers strictly a modern phenomenon? How can they be stopped?

    • How Tsunamis Work

      science

      How Tsunamis Work

      Scientists have now determined that the tsunami that struck northern Japan on March 11 was caused by two waves. While it’s difficult to grasp the full effects this natural disaster has had on Japan’s people and culture, we can explain the physical factors that led to it.

    • 5 Things You Can Do to Make Your Car Safer for Driving in Foul Weather

      auto

      5 Things You Can Do to Make Your Car Safer for Driving in Foul Weather

      New Mexico closed highways earlier this week and the entire country of Scotland went on alert after heavy snow and ice covered the regions. Do you know how to prepare yourself (and your car) to meet Mother Nature's fury?

    • How DUI Works

      auto

      How DUI Works

      The Federal Aviation Administration chief resigned on Tuesday after a drunk driving charge. So how do blood alcohol levels, police procedures and DUI punishment work? What can you do to keep your friends and family safe when you've been out drinking?

    • How the Predator UAV Works

      science

      How the Predator UAV Works

      The U.S. military has confirmed that Iran has the missing RQ-170 drone, an unmanned U.S. spy plane. Remotely-operated spy planes exemplify the military trend toward high-tech, low-risk equipment. What can they accomplish in battle?

    • Did the United States put its own citizens in concentration camps during WWII?

      history

      Did the United States put its own citizens in concentration camps during WWII?

      This week, the U.S. remembers the thousands of American sailors and soldiers who were killed during the attack on Pearl Harbor on Dec. 7, 1941. Is it true that some West Coasters were forcibly relocated after the attack?

    • 10 Remarkable Exoplanets

      science

      10 Remarkable Exoplanets

      Astronomers have just announced the existence of an earthlike planet called Kepler 22-b, 600 light-years away from Earth. Take a look at 10 other cool planet discoveries.

    • Should you buy a tablet or an e-reader?

      electronics

      Should you buy a tablet or an e-reader?

      Apple recently reported to JP Morgan analysts that they aren't concerned about iPad competitors such as the Kindle Fire. These days, the latest tablets and e-readers allow you to read books and compute. So which device is best?

    • 5 Myths About Renewable Energy

      science

      5 Myths About Renewable Energy

      The World Petroleum Congress is meeting this week in Doha, Qatar, to address concerns about global warming and the need for cleaner energy. Not everyone is sold on this vision, so a number of myths about renewable energy persist.

    • If the polar ice caps melted, how much would the oceans rise?

      science

      If the polar ice caps melted, how much would the oceans rise?

      Recent studies show that the Arctic ice caps originated when there was a drop in carbon dioxide levels, reinforcing the notion that the current uptick governs global climate change. The polar ice caps continue to shrink due to global warming, but how much would the oceans rise if the ice caps melted completely?

    • Stuff You Should Know Video: Space, Sneezing & Yosemite Sam

      videos

      Stuff You Should Know Video: Space, Sneezing & Yosemite Sam

      Join Josh and Chuck as they research the first animal in space, why people sneeze in bright sunlight and why in tarnation Yosemite Sam keeps popping up on the radio.

    • Top 10 Most Valuable Records

      entertainment

      Top 10 Most Valuable Records

      Some of the most valuable records on the market aren't what you'd think they would be. Did any favorites from your vinyl collection make the list?

    • 10 Treasures We’ll Lose as Sea Levels Rise

      science

      10 Treasures We’ll Lose as Sea Levels Rise

      The oceans are rising, and they're threatening to take down some of the world's brightest cultural gems. Here are 10 of the most notable spots potentially endangered by climate change.

    • 10 Essentials to Bring on a Road Trip

      adventure

      10 Essentials to Bring on a Road Trip

      It's summertime, and the open road calls. There's so much to see, so much to do -- and so much to pack! Here are 10 road trip essentials.

    • 10 Reasons You Might Not Know You're Pregnant (Until You're in Labor)

      health

      10 Reasons You Might Not Know You're Pregnant (Until You're in Labor)

      Whether pregnancy is planned or a surprise, most women quickly realize they're carrying a developing child. But what if a pregnancy is both unplanned and unknown to the woman who's pregnant?

    • 10 Worst Computer Viruses of All Time

      computer

      10 Worst Computer Viruses of All Time

      Most computer-savvy people know about viruses and how to prevent an infection. But what are some of the most destructive viruses of all time, the record-smasher server-crashers?

    • Top 10 Low-light Plants

      home

      Top 10 Low-light Plants

      Plants have pretty basic needs. They crave water, healthy soil and rays of sunshine. But if you can't provide your flora with lots of direct sun, you can still grow these low-light plants in your shady garden.

    • 10 Most Dangerous Places You Should Definitely Visit

      adventure

      10 Most Dangerous Places You Should Definitely Visit

      It isn't necessarily advisable to visit any of these areas. But then again, if you're willing to take the risk, you'll get to explore places most people will never have the guts to see.

    • 10 New Uses for Old Inventions

      science

      10 New Uses for Old Inventions

      You think you really know an invention until -- whammo -- someone comes up with a new use for it. Ointment that soothes tired cow teats and treats baldness? Who would have thought? Read on for 10 of our favorites.

    • 10 Common Sayings You're Probably Saying Wrong

      people

      10 Common Sayings You're Probably Saying Wrong

      Maybe you could care less about grammar. After all, it's a doggy-dog world, and you're OK as long as people know what you mean, right?

    • 5 NASA Inventions You Won't Believe

      science

      5 NASA Inventions You Won't Believe

      Since 1958, NASA has had to invent everything it needed to make space missions possible. These five amazing inventions, developed by NASA for use in space, have found some amazing Earth-bound applications.

    • 10 Things Your Hair Stylist Doesn't Want You to Know

      lifestyle

      10 Things Your Hair Stylist Doesn't Want You to Know

      You may love your hair stylist. He makes you look like a star and gives you the best scalp massage in town. But he's also getting paid. What are 10 things your stylist could be keeping close to the chest?

    • 10 Ways to Cook Kale

      recipes

      10 Ways to Cook Kale

      Kale packs a nutritional wallop -- 1,300 percent of your daily vitamin K, for starters -- and is incredibly versatile and easy to cook. Here are 10 ways to cook kale.

    • 10 Tips for Your First Day of Work

      money

      10 Tips for Your First Day of Work

      It's hard to find a job these days, but once you get your foot in the door, try not to put it in your mouth -- at least, not right away. Here are some tips designed to help you make the right first impression on your first day at work.

    • 10 Real Events That Seem Like Hoaxes

      history

      10 Real Events That Seem Like Hoaxes

      Did you hear the one about Elvis meeting President Nixon to help the youth stay off drugs? Or 50 Cent performing at a bat mitzvah? These may sound like urban legends, but this time the events are all true.

    • 10 Trade Secrets We Wish We Knew

      money

      10 Trade Secrets We Wish We Knew

      Protected by legal agreements, fail-safes and vaults, the world’s most valuable trade secrets rake in millions of dollars for their owners. Here are 10 lucrative legends.

    • Top 10 Things Your Nails Say About Your Health

      health

      Top 10 Things Your Nails Say About Your Health

      Whether trimmed or long, polished or plain, your nails say a lot about the state of your health. What warning signs are literally at your fingertips?

    • 10 Best Snacks for a Road Trip

      adventure

      10 Best Snacks for a Road Trip

      Road tripping soon? Don't snack on junk from the convenience store. Fill up on these healthy bites that go great in the car.

    • 10 Backyard Landscaping Ideas on a Budget

      money

      10 Backyard Landscaping Ideas on a Budget

      If your backyard is overflowing with green but your wallet isn't, fear not. We've got some budget-friendly landscaping tips that'll keep your back lawn and your bank account in great shape.

    • 10 Absolutely Worst Foods to Eat

      science

      10 Absolutely Worst Foods to Eat

      We all eat things we probably shouldn't, and that's OK from time to time. But there are some foods that are such nutrition bombs that even occasional indulgence isn't exactly wise.

    • 10 Surprisingly Fuel-efficient Sports Cars

      auto

      10 Surprisingly Fuel-efficient Sports Cars

      There’s a saying about sports cars: They can pass anything on the road -- except a gas station. Here are 10 sports cars that break the stereotypical gas-guzzler image.

    • 10 Healthy Ways to Build Credit

      money

      10 Healthy Ways to Build Credit

      For something so relatively easy to obtain, credit can easily cause a careless borrower lots of stress. Here are 10 simple ways to build credit -- and keep it.

    • 10 Ways to Make Extra Money From Home

      money

      10 Ways to Make Extra Money From Home

      Who couldn't use a little extra cash at some point? You may not have the time to go out and hit the pavement in search of a second job, but you could use the skills you have to get the dough you need.

    • 10 Classy Wedding Shower Ideas

      lifestyle

      10 Classy Wedding Shower Ideas

      Unlike friends-only bachelorette parties, bridal showers include mothers-in-law of all shapes and sizes. A gift of lingerie could send a guest into paroxysms. How do you plan a shower that's fun for everyone?

    • Top 10 Ways to Get More Followers on Twitter

      computer

      Top 10 Ways to Get More Followers on Twitter

      It's the age-old falling tree question: If you tweet and no one is around to hear it, does it make a difference? How can you attract followers so that your tweets aren't made in vain?

    • Top 10 Causes of Car Fires

      auto

      Top 10 Causes of Car Fires

      The National Fire Protection Association (NFPA) says that vehicle fires account for about 20 percent of all reported fires, so it's worth knowing how to reduce some of the risk in your own car or truck.

    • Is there a real way to lose belly fat?

      health

      Is there a real way to lose belly fat?

      When it comes to the battle of the bulge, many of us are losing -- especially in the waist area. Is there a healthy, safe way to get rid of belly fat?

    • Why can't we convert salt water into drinking water?

      adventure

      Why can't we convert salt water into drinking water?

      Well, we can. But why don't we do more of it? With oceans and oceans of seawater, you'd think we could make enough freshwater to never go thirsty again

    • How long does a car's air filter last?

      auto

      How long does a car's air filter last?

      Your car's air filter is the first line of defense against the dust, dirt, and debris that can quickly foul up the engine, causing poor performance and shortening the life of the car. How long does a car's air filter last?

    • What is friendship?

      people

      What is friendship?

      In kindergarten, it may have been the girl who always gave you the frosting from her cupcake. As an adult, it may be the guy who will answer the phone at 2 a.m. when you need to talk. How do you define a friend?

    • What are chemtrails, and should you be scared of them?

      science

      What are chemtrails, and should you be scared of them?

      It's difficult to look up in the sky during a clear day and not see at least one cloudy trail billowing from an airplane. Although they're officially called contrails, some people refer to them as "chemtrails" -- and have interesting explanations for their existence.

    • How many solar cells would I need in order to provide all of the electricity that my house needs?

      home

      How many solar cells would I need in order to provide all of the electricity that my house needs?

      How many solar cells would I need in order to provide all of the electricity that my house needs?

    • How do antibiotics work?

      health

      How do antibiotics work?

      An antibiotic selectively kills bacteria, but not the cells in your body. How do these mighty meds work their magic?

    • Do whitening strips damage your teeth?

      health

      Do whitening strips damage your teeth?

      We know they give you pearly whites. But can those popular whitening strips damage your teeth?

    • Who invented the radio?

      science

      Who invented the radio?

      Many people consider Guglielmo Marconi the inventor of the radio. After all, he did get the Nobel Prize for it. But others credit Nikola Tesla because the Supreme Court upheld his patent for the invention of radio. So who should get the recognition?

    • How does a GFCI outlet work?

      home

      How does a GFCI outlet work?

      In my bathroom there is a plug that has a "Test" and a "Reset" button. When I push the "Test" button, it cuts off the current to the outlet. What is this? How is it different from the fuse in the fuse box?

    • Why do we have eyebrows?

      health

      Why do we have eyebrows?

      Eyebrows add expression to your face, and are often waxed and plucked in the name of beauty. But why do we have them in the first place, and what would happen if they went away?

    • Why does my stomach growl?

      health

      Why does my stomach growl?

      Whether you call it grumbling, gurgling or growling, sometimes your belly just won't keep quiet. What makes your stomach growl, and why does it seem to happen at the worst times?

    • What does business casual mean for women?

      lifestyle

      What does business casual mean for women?

      If ever there were a place to be concerned with appearances, it's at work. But when a dress code is as vague as "business casual," how does a woman know what's right and what's terribly wrong?

    • Is brake flushing really necessary?

      auto

      Is brake flushing really necessary?

      It's a familiar scene: You're at your local auto service counter paying for an oil change and a tire rotation when your mechanic asks if you'd also like your brakes flushed. Is it really necessary?

    • Can our brains see the fourth dimension?

      science

      Can our brains see the fourth dimension?

      Most of us are accustomed to watching 2-D films with flat images. But when we put on 3-D glasses, we see a world that has depth. We can imagine existing in such a world because we live in one. What about another dimension altogether?

    • How does someone become a saint?

      people

      How does someone become a saint?

      Becoming a saint in the Roman Catholic Church is designed to be lengthy and difficult process. What are steps involved in canonization?

    • Why is Pluto no longer considered a planet?

      science

      Why is Pluto no longer considered a planet?

      On August 24, 2006, the International Astronomical Union (IAU), an organization of professional astronomers, passed two resolutions that collectively revoked Pluto's planetary status.

    • What will Earth look like in 500 years?

      science

      What will Earth look like in 500 years?

      "The 26th century" doesn't roll off the tongue as easily as "the 21st century" does. But that hasn't stopped us from imagining what our hometown planet will be like in a few hundred years. Any guesses?

    • Is there something in turkey that makes you sleepy?

      science

      Is there something in turkey that makes you sleepy?

      It's Thanksgiving Day and your waistband is groaning, and you're heavy-lidded as you lift one more forkful of pumpkin pie to your mouth. Some say that tryptophan, an amino acid found in turkey, is the reason you want a nap after Thanksgiving dinner.

    • How many calories does a person need daily?

      health

      How many calories does a person need daily?

      Daily calorie needs vary significantly from person to person. Learn how to calculate the number that’s right for your body.

    • How often should you wash your hair?

      health

      How often should you wash your hair?

      Most people wash their hair every day without fail. However, some go without shampoo for weeks, months and even years. Who's right?

    • Why are the keys arranged the way they are on a QWERTY keyboard?

      computer

      Why are the keys arranged the way they are on a QWERTY keyboard?

      The QWERTY keyboard dates all the way back to the first typewriters. Why are the keys arranged this way, rather than alphabetically?

    • Are zoos good or bad for animals?

      animals

      Are zoos good or bad for animals?

      As you visit each amazing exhibit at your local zoo, do you ever feel a twinge of guilt or remorse when watching these enclosed creatures? Are zoos helping or hurting animals?

    • Should I pop my zits?

      health

      Should I pop my zits?

      Though popping pimples is usually frowned upon, dermatologists often extract them for their patients. If it's safe for doctors to pop zits, is it OK for you to do it yourself?

    • How does death by hanging work?

      health

      How does death by hanging work?

      Hanging, when carried out with modern techniques, can be one of the quickest and most painless ways to be executed. But not all hangings are designed to be quick and painless.

    • Plus-size Brides

      lifestyle

      Plus-size Brides

      Plus-size brides aren't stuck with A-line dresses or full-skirted ball gowns. A simple sheath can flatter the figure when it's made from quality materials that skim over the body instead of clinging to it. Explore our beautiful plus-size bride album.

    • Parthenon Pictures

      adventure

      Parthenon Pictures

      The Parthenon was constructed thousands of years ago, but with so much pollution and so many visitors, it may not last for long. Take a look at the Parthenon in Athens, Greece.

    • Green Living Pictures

      home

      Green Living Pictures

      Do you want to learn simple ways to help preserve our planet? Discover some small steps we can take every day that can help save our planet. Check out these Green Living pictures to learn how.

    • Gun Pictures

      science

      Gun Pictures

      Guns come in all shapes and sizes. Put on your safety gear and take a look at this gallery of revolvers, Glocks, shotguns and even flamethrowers.

    • American Politics in Souvenirs and Slogans

      people

      American Politics in Souvenirs and Slogans

      Come convention time, you’ll see attendees sporting head-to-toe political regalia. What’s the history of these tiny statement-makers, and which campaign tchotchkes make plain old buttons look dull?

    • Computer Pictures

      computer

      Computer Pictures

      Computers have come a long way in the past few decades -- from filling up a room to slim and sleek designs that can nearly fit in your pocket. Take a look at some of the old and new models and learn about all the different features and types of these amazing machines.

    • Cool Camera Stuff Pictures

      electronics

      Cool Camera Stuff Pictures

      Cameras are everywhere -- in phones and cars, on buildings and street corners, and even in outer space. Check out the technology, gadgets and imagery that are all part of the bigger camera picture.

    • African Animal Pictures

      animals

      African Animal Pictures

      Many kinds of animals are native only to Africa, such as gorillas, chimpanzees, zebras, giraffes, hippopotamuses. Take a gander at these amazing African animals and see how many you recognize.

    • Classic Muscle Car Pictures

      musclecars

      Classic Muscle Car Pictures

      See pictures of everyone's favorite fast, powerful, gas guzzling cars from the '60s and '70s. They may not be eco-friendly, but they sure were fun while they lasted.

    • Cool Foods and Drinks Pictures

      recipes

      Cool Foods and Drinks Pictures

      When the mercury rises, you need help keeping cool. These bites and beverages will refresh you whether you're at the beach, a backyard barbecue or just driving around town in the blistering heat.

    • Personal Hygiene Pictures

      health

      Personal Hygiene Pictures

      Do you floss, shower, comb your hair? Take a look at how your daily routine affects your health and learn about personal hygiene with this image gallery.

    • 5 Best and Worst Ways to Battle Belly Bloat

      health

      5 Best and Worst Ways to Battle Belly Bloat

      Avoid bloating this bathing suit season by taking these bloating tips to heart and looking great in your slimmest bathing suit!

    • Weight Loss Tips Pictures

      health

      Weight Loss Tips Pictures

      Need some weight loss tips? Discover some weight loss tips in our image gallery and get quick and easy ideas for losing weight.

    • Mysterious Marine Animal Pictures

      animals

      Mysterious Marine Animal Pictures

      Ah, the secrets of the sea. In this gallery, we'll introduce you to some of the more enigmatic animals that drift in the ocean, swim in the sea or shoot their intestines out of their anus in saltwater. Jump in.

    • Shark Pictures

      animals

      Shark Pictures

      Sharks are an intelligent and sometimes dangerous species of saltwater fish. Learn more about these often feared, often misunderstood creatures of the deep in this gallery.

    • History of Radio Pictures

      electronics

      History of Radio Pictures

      You can’t see radio waves, but you can check out relevant telegraphs, vacuum tubes and early radio models in this gallery.

    • Computer Hardware Pictures

      computer

      Computer Hardware Pictures

      Are you curious about what's inside your computer? Browse through these computer hardware pictures and take a tour of your PC, from RAM to hard drives and everything in between.

    • Motorcycle Pictures

      auto

      Motorcycle Pictures

      Motorcycles have evolved in countless ways since their creating near the beginning of the 20th century. Check out our motorcycle image gallery to see how this trend exploded into the coutless motorcycle models, choppers and sport bikes you know today.

    • Green Science Pictures

      science

      Green Science Pictures

      This green science image gallery shows eco-friendly applications as they apply to scientific disciplines. Take a look at these green science pictures.

    • Real Estate Pictures

      home

      Real Estate Pictures

      If you own a home or are interested in owning one in the future, take a look at our real estate pictures. See how the market works, what affects it and what it takes to become a homeowner or landlord.

    • Oil Field Pictures

      science

      Oil Field Pictures

      These pics will take you to the jungles of Sumatra, the Niger delta and points in between all in the name of oil. Get ready to learn about oil all around the globe.

    • Stress Relief Pictures

      health

      Stress Relief Pictures

      Stress is a part of modern life, though it can be bad for your health. Learn ways to relieve stress that are simple and easy to do with this image gallery.

    • National Park Pictures

      adventure

      National Park Pictures

      Ever since the first national park was established in the United States, they've been a getaway for relaxation and adventure for humans, and a safe haven for wildlife. Take a journey through America's national parks.

    • Science and Nature: Fractals

      science

      Science and Nature: Fractals

      Fractals produce fascinating and intricate designs. Browse through this gallery featuring pictures of a variety of fractals like Mandelbrot and Julia sets and find out why nature is loaded with fractals.

    • Sports Car Pictures

      auto

      Sports Car Pictures

      Feeling the need for speed? Get your fix here -- our sports car image gallery features some of the fastest, most powerful models the automotive world has ever known.

    • Think Fast: Test Your CPR Knowledge

      health

      Think Fast: Test Your CPR Knowledge

      CPR guidelines have changed over the years. Would you know what to do in an emergency? Test your skills here.

    • Seeing Red: Test Your Anger Knowledge

      science

      Seeing Red: Test Your Anger Knowledge

      So you've been passed over again at work for that promotion you wanted. You're so angry that you can't get any more work done today, so you've come to HowStuffWorks to spend the rest of the day doing quizzes. Maybe understanding anger might help you to relax!

    • The Ultimate Sex Quiz

      health

      The Ultimate Sex Quiz

      Making love. A roll in the hay. The mattress mambo. Doin' the deed. Ready to test how much you know about sex? As Marvin Gaye would say, let's get it on.

    • Rash Reasons: Common Skin Irritants Quiz

      health

      Rash Reasons: Common Skin Irritants Quiz

      Itchy, red, inflamed skin? Think you know what's causing that rash? Get out the salve and take this soothing quiz!

    • The Ultimate Superhero Quiz

      entertainment

      The Ultimate Superhero Quiz

      This quiz is able to leap tall buildings in a single bound. Bullets ricochet off its chest (although it ducks when the emptied gun is thrown at it). Test your knowledge of superhuman ability while we stretch your brain to the limits. Pow! Kunk! Whap!

    • The Ultimate Toronto Quiz

      adventure

      The Ultimate Toronto Quiz

      Originally a meeting place for native-Americans, Toronto is now a diverse metropolis. Take in a ball game by day -- or visit the nearby waterfalls. There's a 700-acre zoo that the kids can really enjoy, and with thousands of restaurants to choose from, there's something for the whole family. Take our quiz to learn more about how Toronto works.

    • A Nation Divided: Civil War Quiz

      history

      A Nation Divided: Civil War Quiz

      Although it ended more than a century ago, the scars of the Civil War are still with Americans today. Think you know more than the average Billy Yank or Johnny Reb about the blood and politics behind the war? Find out by taking our Civil War quiz.

    • Fact or Fiction: Stretch Marks

      health

      Fact or Fiction: Stretch Marks

      Many a pregnant woman has slathered her belly with lotions in a vain attempt to avoid stretch marks. But the truth is, most women get them at some point or another, whether it happens during pregnancy or not. So is there anything you can do about it?

    • Building a Billion: Do you know how to make serious money?

      money

      Building a Billion: Do you know how to make serious money?

      Some people have a knack for making money. Everything they touch seems to turn to gold, silver or oil. Are you one of them? Could you amass a billion dollars or perhaps a tad smaller amount?

    • Nanogenerators: Tiny Tech, Big Questions

      electronics

      Nanogenerators: Tiny Tech, Big Questions

      Nanogenerators can turn subtle body movements like your heartbeat into power for electronic devices. Think you have what it takes to power through our nanogenerator quiz?

    • Body Works: Sleep Quiz

      health

      Body Works: Sleep Quiz

      Some days, there's nothing like a good nap, even if you know it might keep you up into the wee hours of the night. Have you ever pondered the secrets of sleep? Take this quiz to learn all about sleep and those little jumping sheep.

    • Sex Quiz

      health

      Sex Quiz

      How knowledgeable are you about sex? Test your knowledge with this sex quiz.

    • Test Your Real Knowledge on Fake People

      people

      Test Your Real Knowledge on Fake People

      We all know that if it sounds or looks too good to be true, then it probably is, whether it's a knockoff Coach bag (the real ones have serial numbers) or that new hot girl you met online (is she really that beautiful?). Can you tell the difference between a real person and a fake one online?

    • Quiz: What goes on in your brain when you're attracted to someone?

      science

      Quiz: What goes on in your brain when you're attracted to someone?

      The beginning stage of romance, when you're attracted to someone and can't get thoughts of him or her out of your head, is a roller coaster of emotion. But how much do you really know about the science of attraction and new love? We'll find out in this quiz.

    • Apple Boot Camp Quiz: Drop and give me 20 (GB)!

      computer

      Apple Boot Camp Quiz: Drop and give me 20 (GB)!

      Boot Camp makes it possible for you to run both Mac OS X and Microsoft Windows on Mac computers. Think you know how to navigate both systems at once? Lace up your (digital) combat boots and show your knowledge.

    • Who said it: Darth Vader or Obi-Wan Kenobi?

      entertainment

      Who said it: Darth Vader or Obi-Wan Kenobi?

      Squared off on opposite sides of the Force, it might seem like Darth Vader and Obi-Wan Kenobi have nothing in common. One is tall, dark and deadly, and the other's, well, not.

    • Are you a vampire?

      science

      Are you a vampire?

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    • The Ultimate Must Tools for a Builder's Toolbox Quiz

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      The Ultimate Must Tools for a Builder's Toolbox Quiz

      The rows and rows of shiny new tools at your local DIY store can be very tempting. Before you go out and buy a bunch of tools you don't need and will never use, check out our quiz to see which five tools you definitely can't do without.

    • Are you a lock-picking expert?

      home

      Are you a lock-picking expert?

      If you find yourself locked out of your house, you might be tempted to learn your way around a lock pick. But while the theory is easy, getting a lock to open without a key is a little harder.

    • The Ultimate Ocean and Marine Life Quiz

      animals

      The Ultimate Ocean and Marine Life Quiz

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    • Pump It Up! Heart Health Quiz

      health

      Pump It Up! Heart Health Quiz

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    • The Ultimate Repairing a Small Engine Quiz

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      The Ultimate Repairing a Small Engine Quiz

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    • Girly Body Parts: Why do you embarrass me so?

      health

      Girly Body Parts: Why do you embarrass me so?

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    • Fact or Fiction: Motorcycle Gangs

      auto

      Fact or Fiction: Motorcycle Gangs

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    • Oops! The Great Mechanical Recalls Quiz

      science

      Oops! The Great Mechanical Recalls Quiz

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    • Don't Be Dumb: Mike, the Headless Chicken Was Real

      shows

      Don't Be Dumb: Mike, the Headless Chicken Was Real

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    • Philo Farnsworth and the Invention of the Television

      shows

      Philo Farnsworth and the Invention of the Television

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    • 10 Mind Blowing Sex Facts: Part 1

      shows

      10 Mind Blowing Sex Facts: Part 1

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    • Stephanie Kwolek and the Invention of Kevlar

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      Stephanie Kwolek and the Invention of Kevlar

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    • 10 Robots With Dirty Jobs: Part 2

      shows

      10 Robots With Dirty Jobs: Part 2

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    • Why Does Hot Water Freeze Faster Than Cold Water?

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      Why Does Hot Water Freeze Faster Than Cold Water?

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    • Otters: Not as Cute as you Think They Are

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      Otters: Not as Cute as you Think They Are

      The cuteness of otters carries a lot of sway of on the Internet, but their adorable faces belie the ruthless, predatory and ravenous nature of the family Mustelidae.

    • How Does BitCoin Work?

      shows

      How Does BitCoin Work?

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    • Christopher Sholes and the Invention of the QWERTY Keyboard

      shows

      Christopher Sholes and the Invention of the QWERTY Keyboard

      Although the keys on the original typewriter keyboard were alphabetized, consumers quickly realized the swift taps of typists would inevitably jam the machine. Learn how Christopher Sholes saved the keyboard in this podcast from HowStuffWorks.com.

    • Phobia of the Week: Belly Buttons

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      Phobia of the Week: Belly Buttons

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    • Edward Leedskalnin's Coral Castle

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      Edward Leedskalnin's Coral Castle

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    • 5 Eye Myths

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      5 Eye Myths

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    • 4D Printing is the Future of Design

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      4D Printing is the Future of Design

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    • How Do Memes Work?

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      How Do Memes Work?

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    • How Do Gun Silencers Work?

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      How Do Gun Silencers Work?

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    • How Does Product Placement Work?

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      How Does Product Placement Work?

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    • Why Men Have Short Hair

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      Why Men Have Short Hair

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    • What Happens When I Have A Hangover?

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      What Happens When I Have A Hangover?

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      Men Who Wear Skirts

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    • The Invention of Spray Cans

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      The Invention of Spray Cans

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    • Your Future Home Will be 3D Printed

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      Your Future Home Will be 3D Printed

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    • Tentacles of the Octopus

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      Tentacles of the Octopus

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    • What happened to the hikers at Dyatlov Pass?

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      What happened to the hikers at Dyatlov Pass?

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    • Does Hitting the 57 on Ketchup Bottles Really Work?

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      Does Hitting the 57 on Ketchup Bottles Really Work?

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    • Why do women lie about sex?

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      Why do women lie about sex?

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Stuff You Should Watch

test your knowledge

Fact or Fiction: Class-action Lawsuits
TAKE THE CHALLENGE
Fact or Fiction: Class-action Lawsuits
Average: 0 points | 20 Questions

A class-action lawsuit is a civil lawsuit involving a large group of plaintiffs.

stuff of the day

Did you know: Maine is the only state that shares a border with only one other state -- New Hampshire. Another random fact

“Advice is what we ask for when we already know the answer but wish we didn't.” Who said it?

poll: what do you think?

When was the last time you had your teeth professionally cleaned?

all about photography