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Did you know?
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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Vaccines prevent between 2.5 and 4 million deaths every year.
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You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.
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There are 60,000 miles of blood vessels in every adult human.
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The average office desk has 400 times more bacteria on it than a toilet.
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