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1942 Harley-Davidson WLA and XA
auto.howstuffworks.com/1942-harley-davidson-wla-and-xa.htm
The 1942 Harley-Davidson WLA motorcycle and Harley-Davidson XA motorcycle were weapons of World War II. See pictures and learn about these Harleys.
How Jet Lag Works
science.howstuffworks.com/life/inside-the-mind/human-brain/jet-lag.htm
Jet lag can be a drain on any long-distance trip. Learn about what causes jet lag and the best ways to prevent and deal with jet lag at Discovery Health.
10 Hottest Green Design Materials
home.howstuffworks.com/green-living/10-hottest-green-design-materials.htm
Green design materials can be just as chic as less eco-friendly materials. Check out the 10 hottest green design materials.
Smarter Than the Average Driver? Take This Car Quiz!
play.howstuffworks.com/quiz/smarter-than-the-average-driver-take-this-car-quiz
Are you the person your friends turn to when they have a car-related question? Maybe you're not the one, but you think you should be. Take this quiz and see if you're smarter than your average driver!
5 Signs Your Engine Is Losing Power
Can you name five signs that point to power loss for your car engine? HowStuffWorks can help you identify power loss problems for your engine.
Can You Identify the Tree From Its Bark?
play.howstuffworks.com/quiz/can-you-identify-the-tree-its-bark
From busy cities to lush jungles, from tall mountains to blistering deserts, trees can be found everywhere. Get ready to put your knowledge of trees to the ultimate test with this tree bark quiz!
Test Your Mental Mettle With These Ridiculous Riddles
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Riddles certainly aren't new. In fact, ancient Sumerians were writing them over 4000 years ago! Let's see how well you do with our collection of brain-teasers!
How Racing Team Trailer Towing Works
auto.howstuffworks.com/auto-parts/towing/vehicle-towing/trailer/racing-team-trailer-towing.htm
Interested in racing team trailer towing? Learn all about racing team trailer towing at HowStuffWorks.
How Laser Printers Work
computer.howstuffworks.com/laser-printer.htm
Laser printers are fast, precise and inkless. So how do the words get there? How can a laser beam write on paper? Read about laser printer technology.
How Emergency Power Systems Work
home.howstuffworks.com/home-improvement/household-safety/emergency-power.htm
Most of us are entirely dependent on electricity, so a power outage can become seriously annoying. Learn about the generators and inverters that can put an end to home power failures.