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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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The human body produces and destroys 15 million blood cells every second.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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The average office desk has 400 times more bacteria on it than a toilet.