Portal:History of science/Selected anniversaries/February 23
- 1583 - Birth of Jean-Baptiste Morin, French scientist (d. 1656)
- 1603 - Death of Andrea Cesalpino, Italian philosopher, physician, and botanist (b. 1519)
- 1855 - Death of Carl Friedrich Gauss, German mathematician, astronomer, and physicist (b. 1777)
- 1922 - Death of Albert Victor Bäcklund, Swedish physicist (b. 1845)
- 1941 - Plutonium was first produced and isolated by Dr. Glenn T. Seaborg
- 1987 - Supernova 1987a: A supernova is seen in the Large Magellanic Cloud