Albert Einstein’s theory of gravitational redshift was proven after a telescope in Chile observed a black hole.
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The US Postal Service was founded.
The opera 'Parsifal' by Richard Wagner premiered in Bayreuth, Germany.
As part of the War of the Roses in England, the Battle of Edgcote took place.
Francisco Pizarro became the Governor of Castile, which is a historic area of modern-day Peru.
In one day, Facebook lost $120 billion in value on the stock market.
