The first manned Moon voyage, the Apollo 8, launched with Frank Borman, Jim Lovell, and William Anders.
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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.
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.
A Mongol horde led by Batu Khan conquered and sacked the Russian city of Ryazan.
The first feature-length silent film comedy, 'Tillie's Punctured Romance,' was released, starring Marie Dressler, Mabel Normand, and Charlie Chaplin.
