The adult human brain weighs about 3 pounds (1,300-1,400 g).
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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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Poor eyesight (myopia) is associated with higher IQ.
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Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
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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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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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The average sperm cell swims at 8 inches per hour.
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