MacKenzie Scott, Jeff Bezos’ ex-wife, became the world’s richest woman with a net worth of $68 billion.
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The Viking 2 became the second spacecraft to land on Mars.
John Brallier became the first openly paid professional American Football player when he was paid $10 to play a match.
Sweden switched from driving on the left side of the road to the right side.
The United States and Great Britain signed the Treaty of Paris, ending the Revolutionary war.
Frederick Douglass escaped slavery in the US.
