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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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In 1864, the first barbiturate (barbituric acid) was synthesized.
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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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It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.