Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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Your body is creating and killing about 2.4 million red blood cells per second.
17
Every year your body replaces 98% of your atoms.
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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.
46
The average sperm cell swims at 8 inches per hour.
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Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
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The adult human brain weighs about 3 pounds (1,300-1,400 g).
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