The adult human brain weighs about 3 pounds (1,300-1,400 g).
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Every year your body replaces 98% of your atoms.
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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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Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
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When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
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When you take a step, you are using up to 200 muscles.
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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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Enamel is hardest substance in the human body.
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