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Pulled an all-nighter last night? You're a danger to yourself and others. Find out why sleep deprivation is such a hazard.

If you enjoy scary movies but don't want to see a pet get offed, even a fictional one, you'll like this HowStuffWorks.com list.

Referees and umpires make mistakes. But why do they always make them against our team? Here are 10 of the worst calls in sports history.

Insanity on the throne was more common than you might think. Here are 10 of the maddest royals in history.

Coal rollers create plumes of black smoke by forcing more fuel into a diesel engine than it can handle. Learn about coal rolling at HowStuffWorks.

Can swishing oil around in your mouth for 20 minutes net health benefits? Find out why some people swear by oil pulling.

In among the suspended falls and running into painted tunnels, animation sometimes uses real science. Here are 10 real physics moments in cartoons.

Some diseases used to kill millions of people, but not any longer. Learn about 10 diseases that used to be death sentences from HowStuffWorks.

Movies can convey moods and emotions as no other art form. Learn about 10 films that changed filmmaking at HowStuffWorks.

In times past, if a TV character was getting married, chances are it would happen in Sweeps Week. Find out how Sweeps Week works at HowStuffWorks.