The adult human brain weighs about 3 pounds (1,300-1,400 g).
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One human hair can support 3 ounces.
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The human body contains over a billion miles of DNA.
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All the chemicals in a human body combined are worth about 6.25 euro (if sold separately).
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Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
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For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
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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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