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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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The longest a person has survived after a heart transplant is 24 years.
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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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In 1844, Charles Goodyear obtained the first patent for a rubber condom.