From Wikipedia, the free encyclopedia
June 23
- 1612 - Birth of André Tacquet, Belgian mathematician (d. 1660)
- 1750 - Birth of Déodat Gratet de Dolomieu, French geologist (d. 1801)
- 1806 - Death of Mathurin Jacques Brisson, French naturalist (b. 1723)
- 1832 - Death of Sir James Hall, Bt, Scottish geologist (b. 1761)
- 1868 - Christopher Latham Sholes receives a patent for Type-Writer.
- 1881 - Death of Matthias Jakob Schleiden, German botanist (b. 1804)
- 1891 - Death of Wilhelm Eduard Weber, German physicist (b. 1804)
- 1894 - Birth of Alfred Kinsey, American entomologist and sexologist (d. 1956)
- 1931 - Wiley Post and Harold Gatty take off from Roosevelt Field, Long Island in an attempt to circumnavigate the world in a single-engine plane.
- 1988 - James E. Hansen testifies before the U.S. Senate that it was 99% probable that global warming had begun.
- 1995 - Death of Jonas Salk, American biologist and physician (b. 1914)
- 2006 - Death of Harriet, a 175 year old Galápagos tortoise reportedly collected by Charles Darwin (b. 1830)
