Pyotr Ilyich Tchaikovsky composed his “Swan Lake” ballet.
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General Laborer Thomas Stevens started his first bicycle trip around the world.
Twenty million Americans mobilized to call for greater protections for our planet. This became the world's first Earth Day.
A controversial bill to send asylum seekers to Rwanda was approved by the UK's parliament.
The final gasps of the Crab Head nebula were observed as it went supernova.
The US Congress passed legislation that allowed the 'In God We Trust' inscription on the currency.
