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Can You Identify These Countries By Their Outlines?
play.howstuffworks.com/quiz/97-people-cant-identify-individual-countries-just-a-map-outline-can-you
How well do you remember geography class? The world is a big place with lots of countries. Test your memory and see how many of them you can identify in this world geography quiz!
Can You Identify All of These Countries in the Americas From an Outline?
play.howstuffworks.com/quiz/can-you-identify-all-of-these-countries-in-the-americas-from-an-outline
What better way to test your facts of the Americas than this quiz? Correctly identify countries of North and South America from their outlines, and we'll offer up superb facts about each nation. Major hint: Most of the destinations will be Latin American, bueno? So choose accordingly! Boa sorte!
How to Conserve Energy at Home
home.howstuffworks.com/green-living/how-to-conserve-energy-at-home.htm
What is "energy"? Where does it come from? How do we pay for it? Learn the answers to these questions, and find out how to live more efficiently in your home.
How CAT Scans Work
science.howstuffworks.com/cat-scan.htm
CAT scans take X-ray imaging to a whole new level. Find out how a CAT scan machine uses "slices" to form a 3-D computer model of a patient's insides.
How the Aptera Hybrid Works
auto.howstuffworks.com/aptera-hybrid.htm
The Aptera Hybrid is a concept vehicle that aims to achieve 330 miles per gallon. Learn more about the amazing Aptera Hybrid concept vehicle.
How Long Will the US Oil Reserves Last?
science.howstuffworks.com/environmental/energy/us-oil-reserves-last.htm
The United States has emergency crude oil stored in its Strategic Petroleum Reserve that can be tapped only under certain terms and usually only by the president. So how much is in the reserve and how long can it last?
What's the difference between backscatter machines and millimeter wave scanners?
science.howstuffworks.com/backscatter-machines-vs-millimeter-wave-scanners.htm
Nope, these advanced imaging technologies are not the same. So whether you're concerned about privacy, safety or time as you're shuffling through the airport security line, we can tell you how these two types of scanners stack up against each other.
How Millimeter Wave Scanners Work
science.howstuffworks.com/millimeter-wave-scanner.htm
If you've traveled recently, you probably raised your arms above your head and waited for a millimeter wave scanner to do its screening thing. During those 10 seconds or so, did you ever wonder exactly how the device produced your image?
How Motion-powered Electronics Work
science.howstuffworks.com/environmental/green-tech/sustainable/motion-powered-electronics.htm
Motion-powered electronics are discussed in this article from HowStuffWorks. Learn about motion-powered electronics.
Do HHO systems actually work?
auto.howstuffworks.com/hho-system.htm
Do HHO systems actually work? Read about HHO fuel systems and whether or not they're a legitimate alternative fuel or just science fiction.