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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Everyone has one nostril that is larger than the other.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.