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The human body produces and destroys 15 million blood cells every second.
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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The average office desk has 400 times more bacteria on it than a toilet.