February 23rd
1583 - Birth of Jean-Baptiste Morin, French scientist
1603 - Death of Andrea Cesalpino, Italian philosopher, physician, and botanist
1855 - Death of Carl Friedrich Gauss, German mathematician, astronomer, and physicist
1922 - Death of Albert Victor Bäcklund, Swedish physicist
1924 - Birth of Allan McLeod Cormack, South-African born physicist, Nobel laureate
1941 - Plutonium was first produced and isolated by Glenn T. Seaborg.
1954 - The first mass vaccination of children against polio begins.
1973 - Death of Dickinson W. Richards, American physician, recipient of the Nobel Prize in Physiology or Medicine
2003 - Death of Robert K. Merton, American sociologist
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