Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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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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The average person's skin weighs twice as much as their brain.
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An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
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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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Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
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There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
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You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
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