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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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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.