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300
(BC) Diocles wrote the first known anatomy book
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460
(BC) Birth of Hippocrates, the Greek father of medicine begins the scientific study of medicine and prescribes a form of aspirin
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Jan 1, 1249
Roger Bacon invents spectacles
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Jan 1, 1489
Leonardo da Vinci dissects corpses
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Anton van Leeuwenhoek discovers blood cells
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Dr. Horace Wells uses nitrous oxide as an anesthetic
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Louis Pasteur identifies germs as cause of disease
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Emil von Behring discovers antioxins and develops tetanus and diphtheria vaccines
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Felix Hoffman develops aspirin
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Alec Jeffreys devises a genetic fingerprinting method
