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The horizontal fraction bar was introduced by the Arabs.
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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
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Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.