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There are more nerve cells in one human brain than there are stars in the Milky Way.
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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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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.