Events
1781 - William Herschel discovers Uranus.
1925 - Scopes Trial: A law in Tennessee prohibits the teaching of evolution.
1930 - The news of the discovery of Pluto was telegraphed to the Harvard College Observatory.
Births
1720 - Charles Bonnet, Swiss naturalist and writer
1733 - Joseph Priestley, English scientist
1855 - Percival Lowell, American astronomer
1899 - John Hasbrouck van Vleck, American physicist and Nobel Prize laureate
Deaths
1773 - Philibert Commerçon, French naturalist and explorer
1990 - Bruno Bettelheim, American psychiatrist
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Wow! A big day. Also: establishment of Time Zones and the Prime Meridian.