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Roger Bacon invented the spectacles
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About 75% of Europe's population dead from the plague in just 20 years, also known as the black dead.
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Leonardo da Vinci started dissecting human bodies.
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Anton Van Leeuwenhoek discovers blood cells.
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Clara Barton found the American Red Cross
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Louis Pasteur developed the first vaccine for rabies.
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William Roentgen discovered X-rays
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Felix Hoffman develops aspirin
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Insulin was use to treat diabetes.
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Sir Alexander Fleming discovered penicillin.
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Jonas Silk develop a vaccine for polio.
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Dr. Christiaan performs the first heart transplant.
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First vaccine for chicken poxs.
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The first test tube baby was born in the U.K.
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Dr. William DeVries implanted the Jarvik-7 artificial heart into Barny Clark. Clark lives for 11 years.
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HIV, the virus for aids was discovered.
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Dolly the sheep was the first mammal to get clone.
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Scientists discover how to use human cell to create embronic stem cells
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