Events
1796 - Carl Friedrich Gauss discovered that every positive integer is representable as a sum of at most three triangular numbers.
1925 - Scopes Trial: In Dayton, Tennessee, the so-called "Monkey Trial" begins with John T. Scopes, a young high school science teacher, accused of teaching evolution in violation of a Tennessee state law.
1962 - Telstar, the world’s first communications satellite, is launched into orbit.
Births
1809 - Friedrich August von Quenstedt, German geologist
1832 - Alvan Graham Clark, American telescope maker and astronomer
1902 - Kurt Alder, German chemist, Nobel Prize laureate
1920 - Owen Chamberlain, American physicist, Nobel Prize laureate
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Births
Events
1847 - James Young Simpson is the first to use chloroform as an anaesthetic.
Births
1711 - Georg Wilhelm Richmann, Russian physicist
Births
1823 - Johannes Friedrich August von Esmarch, German surgeon