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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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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.