Portal:History of science/Selected anniversaries/February 26
- 1638 - Death of Claude Gaspard Bachet de Méziriac, French mathematician (b. 1681)
- 1786 - Birth of François Arago, French mathematician (d. 1853)
- 1799 - Birth of Émile Clapeyron, French engineer and physicist (d. 1864)
- 1814 - Birth of Charles Joseph Sainte-Claire Deville, French geologist (d. 1876)
- 1866 - Birth of Herbert Henry Dow, American chemical industrialist (d. 1930)
- 1903 - Birth of Giulio Natta, Italian chemist, Nobel laureate (d. 1979)
- 1931 - Death of Otto Wallach, German chemist, Nobel laureate (b. 1847)
- 1935 - The Daventry Experiment, Robert Watson-Watt carries out a demonstration near Daventry which leads directly to the development of RADAR in the United Kingdom
- 1946 - Birth of Ahmed H. Zewail, Egyptian chemist, Nobel laureate
- 1952 - United Kingdom Prime Minister Winston Churchill announces that his nation has an atomic bomb