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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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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.
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According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.
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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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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.