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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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The horizontal fraction bar was introduced by the Arabs.
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The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").
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Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.