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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One human hair can support 3 ounces.
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Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
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Poor eyesight (myopia) is associated with higher IQ.
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Every human spent about half an hour as a single cell.
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The world's shortest man measures only 21.5 inches.
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There are about 255 babies born worldwide every minute.
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Early American humans hunted car-size armadillos and used their shells for houses.
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