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The average office desk has 400 times more bacteria on it than a toilet.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.
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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.