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Invented in the 5th century.
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Invented in 1300
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Invented by Rene Laennec.
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You are not awake for the surgery.
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Elizabeth Blackwell
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helps you to not get pregnant
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It was a mercury thermometer.
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It was discovered by William Einthoven.
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discovered by Wilhelm Conrad Rontgen.
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It was invented in Germany.
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It was discovered by Alexander Fleming.
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Also known as Cardiopulmonary resuscitation
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In glasglow
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Performed by Christiaan Barnard
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Performed by Laurent Lantieri.