The human brain has the capacity to store everything that you experience.
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When you take a step, you are using up to 200 muscles.
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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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It takes about 20 seconds for a red blood cell to circle the whole body.
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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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The largest cell in the human body is the female egg and the smallest is the male sperm.
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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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The average sperm cell swims at 8 inches per hour.
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