The human brain has the capacity to store everything that you experience.
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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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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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Your thumb is about the same size as your nose.
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It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
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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.
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It takes about 20 seconds for a red blood cell to circle the whole body.
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