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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.
On average, the stomach produces 2 L of hydrochloric acid per day.
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
Blood is approximately twice as thick as water because of the cells and other components found in it.
Women are 50% to 75% more likely than men to experience an adverse drug reaction.
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