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.
Elton John and his partner David Furnish registered their civil partnership at Windsor Town Hall on the first day civil partnerships could legally be performed in England.
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.
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.
