The first vice president of the United States, John Adams, was sworn in.
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Brazil founded the city of Brasília and made it the nation's new capital city.
Climate change activist Greta Thunberg gave a speech in London, leading to protests across the city for four days.
American Psychologist Timothy Leary and Star Trek creator Gene Roddenberry were launched into orbit after being cremated.
Romulus and Remus founded the city of Rome.
The Surgeon's Photograph, the most famous photo of the Loch Ness Monster, was published.
