Ireland ended its ban on divorce.
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Psy's 'Gangnam Style' music video became the most viewed video on YouTube, passing 800 million views.
Abel Tasman became the first European to discover Tasmania and named it Van Diemen's Land.
An international research team published their discovery of 1,500 new viruses that were in invertebrates in Australia and China.
George Hancock, who invented softball, played the first match in Chicago.
Photographer Alfred Stieglitz opened The Little Galleries of the Photo-Secession in Manhattan, New York.