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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.