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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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The human body produces and destroys 15 million blood cells every second.