Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
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The human sigh acts as a physiological reset button.
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Obsessive nose picking is called Rhinotillexomania.
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A man's beard grows fastest when he anticipates sex.
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The world's shortest man measures only 21.5 inches.
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