The largest cell in the human body is the female egg and the smallest is the male sperm.
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A human being loses an average of 40 to 100 strands of hair a day.
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In one day, adult lungs move about 10,000 litres of air.
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It takes about 20 seconds for a red blood cell to circle the whole body.
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A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
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Early American humans hunted car-size armadillos and used their shells for houses.
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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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