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The horizontal fraction bar was introduced by the Arabs.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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Medication errors are three times higher among children and infants than with adults.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.