Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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The average sperm cell swims at 8 inches per hour.
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Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
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If you hold farts in during the day, they'll just come out when you sleep.
16
All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
21
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
It is possible for you to survive even after the removal of the spleen, the stomach, one kidney, one lung, 75% of the liver, 80% of the intestines, and almost every organ from the pelvic and groin area.
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