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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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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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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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There are more nerve cells in one human brain than there are stars in the Milky Way.