Albert Einstein’s theory of gravitational redshift was proven after a telescope in Chile observed a black hole.
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As part of the War of the Roses in England, the Battle of Edgcote took place.
President Harry Truman signed the National Security Act.
Platform diver Tom Daley won his first Olympic gold medal in men's synchronized diving, 13 years after his first Olympic games.
The opera 'Parsifal' by Richard Wagner premiered in Bayreuth, Germany.
Niger President Mohamed Bazoum was removed from office by a military coup.