Babies' eyes do not produce tears until the baby is approximately six to eight weeks old.
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Blonde hair is not exclusive to Europeans. Melanesians of the south Pacific evolved a different gene for blonde hair.
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Women mature much faster than men.
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47% of people have a nightmare at least once a month.
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The world's shortest man measures only 21.5 inches.
73
Men fall in love faster than women do.
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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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