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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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There are more bacteria in your mouth than there are people in the world.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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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.