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Did you know?
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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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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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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Everyone has one nostril that is larger than the other.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.