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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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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
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The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.