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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About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Cyanide works by making the human body unable to use oxygen.
True-color view of Mars seen through NASA's Hubble Space Telescope in 1999
Mark Twain supplemented his income as a writer by giving humorous lectures.