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Your heart beats over 36 million times a year.
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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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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).