New Zealand golfer Lydia Ko became the youngest golfer to rank No. 1 in the world.
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San Francisco's skies went dark after millions of birds flew across the city's western side.
Doug Williams became the first African-American quarterback to play in the Super Bowl.
The United Kingdom left the European Union, also known as 'Brexit.'
The day after being appointed, Adolf Hitler called for new elections to ensure he would win majority votes.
A chimpanzee named Ham became the first primate to go to space aboard the US MR-2 spacecraft.
