Portal:History of science/Selected anniversaries/February 12
- 1612 - Death of Christopher Clavius, German astronomer (b. 1538)
- 1637 - Birth of Jan Swammerdam, Dutch biologist (d. 1680)
- 1777 - Birth of Bernard Courtois, French chemist (d. 1838)
- 1785 - Birth of Pierre Louis Dulong, French physicist (d. 1838)
- 1788 - Birth of Carl Reichenbach, German chemist and philosopher (d. 1869)
- 1791 - Birth of Peter Cooper, American Industrialist, inventor and philanthropist (d. 1883)
- 1799 - Death of Lazzaro Spallanzani, Italian biologist (b. 1729)
- 1804 - Birth of Heinrich Lenz, German physicist (d. 1865)
- 1809 - Birth of Charles Darwin, English naturalist (d. 1882)
- 1908 - Birth of Jacques Herbrand, French logician and mathematician (d. 1931)
- 1912 - The Republic of China adopts the Gregorian calendar
- 1916 - Death of Richard Dedekind, German mathematician (b. 1831)
- 1918 - Birth of Julian Schwinger, American physicist, Nobel laureate (d. 1994)
- 1958 - Death of Douglas Hartree, English mathematical physicist (b. 1897)