Portal:History of science/Selected anniversaries/August 2
- 1788 - Birth of Leopold Gmelin, German chemist (d. 1853)
- 1823 - Death of Lazare Carnot, French general, politician, and mathematician (b. 1753)
- 1932 - The positron (antiparticle of the electron) is discovered by Carl D. Anderson
- 1939 - Albert Einstein and Leó Szilárd write a letter to Franklin D. Roosevelt urging him to begin the Manhattan project to develop a nuclear weapon