Astronomer Sir William Herschel discovered the first two moons of Uranus, Titania & Oberon.
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Harry Potter author J.K. Rowling officially finished writing The Deathly Hallows.
Charing Cross Railway Station opened in London, England.
The first Jewish person was elected in the US.
The first successful administration of insulin to treat diabetes was given to 14-year-old Leonard Thompson.
Los Angeles was covered in snow for the first time in recorded history.
