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Jan 1, 1450
Printing Press
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Mercury thermometer first created
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Benjamin Franklin invents bifocals
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Vaccine developed for smallpox (Jenner)
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Rene Laennec invents the stethoscope
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First anestethic, ether, introduced
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Elizabeth Blackwell became first female doctor
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Civil War
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Pasteurization was developed
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Germ theory introduced
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Founded the American Red Cross
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Rabies vaccine discoverd
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X-rays discovered
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Isolated Radium
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WWI
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Penicillin discovered
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WWII
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Polio Vaccine developed
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Birth control pill indtroduced
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First successful heart transplant
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First test-tube baby born
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Louise Brown first human to have been born by in vitro
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AIDS first recognized
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Scientists clone sheep