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How Noise-canceling Headphones Work
electronics.howstuffworks.com/gadgets/audio-music/noise-canceling-headphone.htm
Noise-canceling headphones are designed to maximize your listening experience. Learn how noise-canceling headphones keep ambient noise out without sacrificing your music's sound quality.
10 Car Accessories That Could Be Dangerous
A car is an extension of the person driving it. And if you want to make your car as unique as you are, there are an almost infinite number and variety of add-ons. But which accessories could be hazardous?
How Rainbows Work
science.howstuffworks.com/nature/climate-weather/storms/rainbow.htm
Rainbows are one of nature's most beautiful effects. Have you ever wondered how the colors end up in seemingly perfect bands? And, what about double rainbows -- how does that happen? Find out how rain and sun can align to put color in the sky.
What Does a Catalytic Converter Do and Why Do People Steal Them?
auto.howstuffworks.com/catalytic-converter.htm
Catalytic converters are one of the most important parts of a car's emissions control system. Learn about catalytic converters and catalytic converter laws.
How Bearings Work
science.howstuffworks.com/transport/engines-equipment/bearing.htm
Bearings are the invisible heroes inside many mechanical devices. Learn about all different kinds of bearings, including 5-foot ball bearings that keep buildings on solid footing.
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.
How do gazelles use body language?
animals.howstuffworks.com/mammals/gazelle-body-language.htm
Gazelle body language includes jumping, with legs held stiff, in the face of an approaching predator. Learn the nuances of gazelle body language.
Stegosaurus: Body Like a Bus, Tiny Little Brain
animals.howstuffworks.com/dinosaurs/stegosaurus.htm
Stegosaurus, an herbivorous dinosaur from 149 million years ago, walked on four legs, had a long, beak-tipped skull, a row of spikes adorning its tail and a pea-sized brain.
Can I recycle my carpet?
home.howstuffworks.com/home-improvement/home-diy/flooring/recycle-carpet.htm
Around 5 billion pounds of carpet goes to landfills every year. Learn how to recycle carpet to slow this wasteful trend.
How Many Muscles Does It Take to Smile?
science.howstuffworks.com/life/inside-the-mind/emotions/muscles-smile.htm
The authors of chain emails often tell you to smile more, with the added claim that it takes more muscles to frown. Ever questioned this piece of wisdom? We have an answer for you.