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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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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.