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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.