The strain of swine flu known as H1N1 had its first case in the US.
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The term ''Big Bang" was coined by Fred Hoyle in a radio interview.
The European Union Parliament declared single-use plastics were to be banned by 2021.
The Vienna Philharmonic Orchestra performed its first concert.
Frenchman Henri Fabre flew the world's first seaplane in Martinique, France.
Bank of Tokyo and Mitsubishi Bank merged to become the world's largest bank.
