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The horizontal fraction bar was introduced by the Arabs.
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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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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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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.