Roman Emperor Valentinian I made his brother, Flavius Valens, his co-emperor.
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Stanley Kramer became the first person to receive a star on the Hollywood Walk of Fame.
The term ''Big Bang" was coined by Fred Hoyle in a radio interview.
A nuclear disaster occurred at Three Mile Island in Pennsylvania, US.
The world's first weightlifting championship took place in London, England.
An Imperial Airways passenger aircraft crashed in Belgium, killing all fifteen on board.
