Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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It takes about 20 seconds for a red blood cell to circle the whole body.
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Research has determined that most people are happiest at 7:26pm on a Saturday night.
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A human being loses an average of 40 to 100 strands of hair a day.
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The human brain is more active during sleep than during the day.
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Our eyes are always the same size from birth, but our nose and ears never stop growing.
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A person can live without food for about a month, but only about a week without water.
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In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
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