Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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In 1996, research found that having excessive body hair is linked to higher intelligence.
23
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
Your thumb is about the same size as your nose.
124
The human sigh acts as a physiological reset button.
23
One human hair can support 3 ounces.
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