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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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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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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.