March 13th
1720 - Birth of Charles Bonnet, Swiss naturalist and writer
1733 - Birth of Joseph Priestley, English scientist and minister
1781 - William Herschel discovers Uranus.
1781 - Charles Messier publishes final catalog of Messier objects.
1781 - Carl Wilhelm Scheele discovers tungsten.
1784 - Birth of Jean Moufot, French philosopher and mathematician
1855 - Birth of Percival Lowell, American astronomer
1899 - Birth of John Hasbrouck van Vleck, American physicist, Nobel Prize laureate
1925 - The Butler Act in Tennessee prohibits the teaching of evolution. This would lead to the Scopes Trial in the same year.
1945 - Birth of Anatoly Timofeevich Fomenko, Ukrainian-Russian mathematician
1969 - Apollo 9 returns safely to Earth after testing the Lunar Module.