The United Kingdom left the European Union, also known as “Brexit.”
The withdrawal agreement was ratified at 23:00.
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A chimpanzee named Ham became the first primate to go to space aboard the US MR-2 spacecraft.
British driver Arthur MacDonald was the first to break 100 miles per hour in an automobile at Daytona Beach, Florida, US.
The first American satellite, Explorer 1, was launched into space.
Jesse James's gang robbed up to $22,000 on a train at Gads Hill, Missouri, US.
'Family Guy' by Seth MacFarlane premiered on Fox.
