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Sep 6, 1249
Spectacles
Roger Bacon invents spectacles -
Nov 16, 1489
Leonardo da Vinci
Leonardo da Vinci dissects corpses -
Microscope
Zacharius Jannssen invents the microscope -
Blood Cells
Anton van Leeuwenhoek discovers blood cells -
Bacteria
Anton van Leeuwenhoek observes bacteria -
Vaccination for smallpox
Edward Jenner develops the process of vaccination for smallpox, the first vaccine for any disease -
Stethoscope
Rene Laennec invents the stethoscope -
Transfusion
James Blundell performs the first successful transfusion of human blood -
Nitrous Oxide
Dr. Horace Wells uses nitrous oxide as an anesthetic -
Elizabeth Blackwell
Elizabeth Blackwell is the first woman to gain a medical degree from Geneva Medical College in New York -
Charles and Alexander
Charles Gabriel Pravaz and Alexander Wood develop the syringe -
Louis Pasteur
Louis Pasteur identifies germs as cause of disease -
X-Rays
Wilhelm Conrad Roentgen discovers X rays -
Aspirin
Felix Hoffman develops aspirin -
Blood Groups
Karl Landsteiner introduces the system to classify blood into A, B, AB, and O groups -
Insulin
Insulin first used to treat diabetes. -
pneumonia
First vaccine developed for pneumonia. -
HIV
HIV, the virus that causes AIDS, is identified -
Dolly the Sheep
Dolly the sheep becomes the first clone -
Cancer
First vaccine to target a cause of cancer