The groundbreaking TV soap opera “Sua Vida Me Pertence” premiered in Brazil.
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A Mongol horde led by Batu Khan conquered and sacked the Russian city of Ryazan.
The first crossword puzzle was printed.
Psy's music video for 'Gangnam Style' surpassed one billion views on YouTube, becoming the first video to do so in the website's history.
French scientists Pierre and Marie Curie discovered radium.
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.