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The horizontal fraction bar was introduced by the Arabs.
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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.