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How Muscles Work
health.howstuffworks.com/human-body/systems/musculoskeletal/muscle.htm
Muscles are your body's engine, and you couldn't do anything without them. Learn about skeletal muscle, smooth muscle, and cardiac muscle and how muscle contraction works.
How Flintlock Guns Work
science.howstuffworks.com/flintlock.htm
Flintlock guns were extremely important weapons in the American Revolution; they also formed the foundation of all modern guns. Learn about the gun that started it all.
How a Theremin Works
electronics.howstuffworks.com/gadgets/audio-music/theremin.htm
A theremin is an instrument you can play without touching. Learn how a theremin works and the history of the theremin at HowStuffWorks.
Which of These Two Cars Is Faster?
play.howstuffworks.com/quiz/which-of-these-two-cars-is-faster
Mustang versus Camaro. Ferrari versus Lamborghini. Fast versus furious. The history of the automobile is full of classic car battles. Can you tell us which car is faster? Buckle up - we're about to find out.
Duct Tape or WD-40: Do You Know Enough to Fix Your Car on the Side of the Road?
From duct-taped hoses to pantyhose belts to a little bit of toothpaste on the headlights to keep them shining bright, if you know your roadside emergency fixes, then bust out that roll of duct tape and take the quiz.
How Jackhammers Work
home.howstuffworks.com/jackhammers.htm
You've probably been irritated by jackhammer noise at some point, but have you ever stopped to think about these marvels of concrete-busting power? Without them, demolition would be a whole lot more difficult.
How the Physics of Baseball Works
entertainment.howstuffworks.com/physics-of-baseball.htm
What are the physics of baseball? Learn about the physics of baseball in this article from HowStuffWorks.
Does time change speed?
science.howstuffworks.com/science-vs-myth/everyday-myths/time-dilation.htm
Time dilation is the reason why boring things seem to take so long but time flies when you're having fun. Learn how time dilation affects the speed of time.
Can I Survive a Shark Attack by Gouging Out Its Eyes?
animals.howstuffworks.com/fish/sharks/poking-shark-eye.htm
A shark is coming at you. It opens its mouth wide, baring teeth. Will you be able to reach around and poke it in the eyes without losing an arm?
How Sequential Gearboxes Work
auto.howstuffworks.com/sequential-gearbox.htm
Combine the ease of an automatic with the driver control of a manual, and what you've got is a sequential manual transmission. A simple forward push advances the gear. Learn all about the sequential gearbox.