Obsessive nose picking is called Rhinotillexomania.
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Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Poor eyesight (myopia) is associated with higher IQ.
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A man's beard grows fastest when he anticipates sex.
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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.
15
On average, there's 100 billion neurons in the human brain.
83
Human hair and fingernails continue to grow after death.
7