Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
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The human brain is more active during sleep than during the day.
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Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
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Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
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On average, there's 100 billion neurons in the human brain.
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The average person's skin weighs twice as much as their brain.
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The world's shortest man measures only 21.5 inches.
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