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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.