Obsessive nose picking is called Rhinotillexomania.
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Poor eyesight (myopia) is associated with higher IQ.
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The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
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Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
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Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
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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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