The Grand Canyon National Monument was created.
It was the fifteenth site in the US to be named a national park.
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Luther Terry, the US Surgeon General, released a report concluding smoking cigarettes is bad for you.
Astronomer Sir William Herschel discovered the first two moons of Uranus, Titania & Oberon.
The first successful administration of insulin to treat diabetes was given to 14-year-old Leonard Thompson.
Samuel Morse sent the first telegraph message using Morse code across two miles of wire in New Jersey, USA.
Judge Simon Cowell left American Idol but continued working with FOX on X Factor US.
