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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
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There are 60,000 miles of blood vessels in every adult human.
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A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.