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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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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 National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.