Marie and Pierre Curie isolate radium in Paris, France.
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Danica Patrick won the Indy Japan 300, becoming the first woman to win an Indy car race.
SpaceX's Starship rocket exploded four minutes into its first full flight test.
Captain James Cook arrived at the shore in New South Wales, Australia.
Neil Armstrong flew the X-15 craft to an altitude of 34 miles (54.6 km).
The League of Nations was officially dissolved by its member states.
