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The human body produces and destroys 15 million blood cells every second.
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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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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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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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Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.