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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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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 immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.