A Mongol horde led by Batu Khan conquered and sacked the Russian city of Ryazan.
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President Coolidge signed a bill authorizing The Boulder Canyon Project Act, which allowed for the construction of what is known today as the Hoover Dam.
The first full-length animated feature film, 'Snow White and the Seven Dwarfs,' premiered.
The first crossword puzzle was printed.
French scientists Pierre and Marie Curie discovered radium.
Antonov An-255 Mriya, the largest airplane in the world, flew for the first time.
