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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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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.