A Mongol horde led by Batu Khan conquered and sacked the Russian city of Ryazan.
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Antonov An-255 Mriya, the largest airplane in the world, flew for the first time.
The first crossword puzzle was printed.
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.
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.
The first manned Moon voyage, the Apollo 8, launched with Frank Borman, Jim Lovell, and William Anders.