Francisco Pizarro became the Governor of Castile, which is a historic area of modern-day Peru.
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In one day, Facebook lost $120 billion in value on the stock market.
Platform diver Tom Daley won his first Olympic gold medal in men's synchronized diving, 13 years after his first Olympic games.
Asiana Airlines Flight 733 crashed in South Korea.
Albert Einstein's theory of gravitational redshift was proven after a telescope in Chile observed a black hole.
As part of the War of the Roses in England, the Battle of Edgcote took place.
