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There are 20 feet of blood vessels in each square inch of human skin.
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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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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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.