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We revisit the idea that a genetic variation may affect how quickly the body breaks down caffeine, affecting the frequency of a certain craving.

In one of its more bizarre moments, the U.S. Army created voice tapes of allegedly wandering souls to depress Viet Cong morale.

The expression 'mad as a hatter' predates the Mad Hatter in 'Alice in Wonderland.' So, where did the term come from?

How did Saul Hudson become Slash? And where did the name Meat Loaf come from? Test your knowledge of musical nicknames with this rockin' quiz!

HowStuffWorks looks at a new study suggesting that sleeping in on the weekends is good for you.

Disruptive technology might sound annoying, but it's actually a sign of advancement. Learn why at HowStuffWorks.

Sneezing at the wrong moment can be downright dangerous. But is it just as dangerous to stifle a sneeze? Find out at HowStuffWorks.

How well do you know these commonly flubbed abbreviations? Take this HowSuffWorks quiz to find out.

Don't be too hard on yourself if you've ever mixed up a couple of similar-looking, sounding or tasting things. Learn the differences with our quiz.

Lots of U.S. states have nicknames, but Missouri's flinty moniker arguably is one of the best.

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