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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).
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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The longest a person has survived after a heart transplant is 24 years.
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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.