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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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There are more bacteria in your mouth than there are people in the world.
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Your heart beats over 36 million times a year.
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Approximately 25% of all reported medication errors result from some kind of name confusion.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.