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In 1864, the first barbiturate (barbituric acid) was synthesized.
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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 over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.