After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
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Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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Every year your body replaces 98% of your atoms.
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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 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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The human brain has the capacity to store everything that you experience.
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