The Beginning of Medicine

  • Jan 1, 1249


    Roger Bacon invents spectacles
  • Jan 1, 1489


    Leonardo da Vinci dissects corpses
  • Microscope

    Zacharius Jannssen invents the microscope
  • Blood Cells Discovered

    Anton van Leeuwenhoek discovers blood cells
  • First Blood transfusion

    British obstetrician James Blundell performs the first successful transfusion of human blood.
  • Anesthetic

    Dr. Horace Wells uses nitrous oxide as an anesthetic
  • Anesthetics

    Dr. Horace Wells, American dentist, uses nitrous oxide as an anesthetic
  • Contact Lenses

    First contact lenses developed
  • Tetanus

    Emil von Behring discovers antitoxins and uses them to develop tetanus and diphtheria vaccines
  • X-Rays

    German physicist Wilhelm Conrad Roentgen discovers X rays.
  • Aspirin

    Felix Hoffman develops aspirin (acetyl salicylic acid). The juice from willow tree bark had been used as early as 400 BC to relieve pain.
  • Stethescope

    Rene Laennec invents the stethoscope
  • Diabetes

    Insulin first used to treat diabetes.
  • Tuberculosis

    First vaccine for Tuberculosis created
  • Influenza

    First vaccine for influenza was developed.
  • Pacemaker

    John Hopps invented the first cardiac pacemaker
  • Vaccine for Measles

    First vaccine developed for measles

    HIV, the virus that causes AIDS, is identified
  • Cancer Vaccine

    First vaccine to target a cause of cancer
  • Stem Cell Research

    Scientists discover how to use human skin cells to create embryonic stem cells.