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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
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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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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.