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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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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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Medication errors are three times higher among children and infants than with adults.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.