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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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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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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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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.