DNA is so tightly coiled that if you stretched out all the DNA from a single human cell, it would be about six feet long.
Fact #3713
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The human body is about 60% water.
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The pacemaker regulates irregular heartbeats.
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Fingernails grow faster than toenails.
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Your bones are stronger than steel.
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Your heart creates enough pressure to squirt blood several feet.
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Humans are the only animals with chins — no other primate or mammal has one.
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Humans shed about 30,000 to 40,000 dead skin cells every hour.
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The human brain is optimized for pattern recognition.
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