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The horizontal fraction bar was introduced by the Arabs.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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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.
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A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.