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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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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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The horizontal fraction bar was introduced by the Arabs.
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There are more sensory neurons in the tongue than in any other part of the body.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.