Human bones are more than twice the strength of concrete.

Human bones are more than twice the strength of concrete

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Another difference between the sexes is that women blink twice as often

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The cornea is the only tissue in the human body that doesn’t contain

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Eyelashes have an average lifespan of five months

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Although our nose and ears keep growing throughout our lives, our eyes

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Blue-eyed people share a common ancestor with every other blue-eyed

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In your lifetime you will produce around 10,000 gallons of saliva