Portal:History of science/Selected anniversaries/September 26
- 1580 - Sir Francis Drake finishes his circumnavigation of the Earth
- 1716 - Death of Antoine Parent, French mathematician (b. 1666)
- 1802 - Baron Jurij Vega, Slovenian mathematician and military officer (b. 1754)
- 1868 - Death of August Ferdinand Möbius, German mathematician and astronomer (b. 1790)
- 1877 - Death of Hermann Grassmann, German mathematician and physicist (b. 1809)
- 1887 - Birth of Sir Barnes Wallis, English scientist, engineer and inventor (d. 1979)
- 1951 - Death of Hans Cloos, German geologist (b. 1885)
- 1976 - Death of Lavoslav Ružička, Croatian chemist, Nobel laureate (b. 1887)
- 1978 - Death of Manne Siegbahn, Swedish physicist, Nobel laureate (b. 1886)