Portal:History of science/Selected anniversaries/September 3
- 1710 - Birth of Abraham Trembley, Swiss naturalist (d. 1784)
- 1803 - English scientist John Dalton started using symbols to represent the atoms of different elements
- 1869 - Birth of Fritz Pregl, Slovenian chemist, Nobel Prize laureate (d. 1930)
- 1899 - Birth of Frank Macfarlane Burnet, Australian biologist, recipient of the Nobel Prize in Physiology or Medicine (d. 1985)
- 1905 - Birth of Carl David Anderson, American physicist, Nobel Prize laureate (d. 1991)
- 1938 - Birth of Ryoji Noyori, Japanese chemist, Nobel Prize laureate
- 1976 - Viking program: The Viking 2 spacecraft lands at Utopia Planitia on Mars
- 2005 - Death of Richard S.R. Fitter, British ornithologist and botanist (b. 1913)