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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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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

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Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

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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.

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Video: Digestive chemicals - types & enzymes

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