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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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People about to have surgery must tell their health care providers about all supplements they take.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.