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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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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.
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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.