George Hancock, who invented softball, played the first match in Chicago.
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STS 44 Atlantis 10 was launched into space.
Psy's 'Gangnam Style' music video became the most viewed video on YouTube, passing 800 million views.
An international research team published their discovery of 1,500 new viruses that were in invertebrates in Australia and China.
Ireland ended its ban on divorce.
Abel Tasman became the first European to discover Tasmania and named it Van Diemen's Land.
