Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
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Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
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An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
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After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
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Obsessive nose picking is called Rhinotillexomania.
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The human body contains over a billion miles of DNA.
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Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
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