Portal:History of science/Selected anniversaries/April 20

April 20:

 * 1534 - Jacques Cartier begins his voyage, in which he will discover Canada and Labrador


 * 1646 - Birth of Charles Plumier, French botanist (d. 1704)


 * 1862 - The first pasteurization test completed by Louis Pasteur and Claude Bernard


 * 1904 - Birth of George Stibitz, American scientist (d. 1995)


 * 1918 - Birth of Kai Siegbahn, Swedish physicist, Nobel Prize laureate (d. 2007)


 * 1918  - Death of Karl Ferdinand Braun, German physicist, Nobel Prize laureate (b. 1850)


 * 1927 - Birth of Karl Alexander Müller, Swiss physicist, Nobel Prize laureate


 * 1928 - Birth of Gerald S. Hawkins, English astronomer (d. 2003)


 * 1932 - Death of Giuseppe Peano, Italian mathematician (b. 1858)


 * 1963 - Birth of Aubrey de Grey, British biomedical gerontologist


 * 2003 - Death of Bernard Katz, German-born biophysicist, recipient of the Nobel Prize in Physiology or Medicine (b. 1911)