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TIL had Napoleon not sold Louisiana (size of 4 French landmass) to the United States in 1803, Britain would've ended up with it after the Napoleonic Wars and modern day Canada would've stretched to the gulf of Mexico.

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97oM TIL After averaging the light from 200K galaxies, researchers have determined the colour of the universe is a pale turquoise green.
P10PE TIL roughly 115 million years ago in the time of dinosaurs, a little 5cm mushroom from Gondwana fell in a river, journeyed to a highly saline lagoon, sank down, down, thru the water. Was covered in layer upon layer of fine sediment. Becoming Gondwanagaricites magnificus, the oldest fossil mushroom
4XEj5 TIL in 1962 the US detonated a nuke, Starfish Prime, in space to clear out Van Allen belt radiation (making Apollo missions safer) and for research. It took out part of Hawaii's electrical grid, several satellites, and made the Van Allen radiation much worse. A planned further test was cancelled.
Og11 TIL after finding out his wife was having an affair, the future King George I of England beat and choked her, divorced her, and then had her imprisoned for the rest of her life. And had her lover murdered.
e0bk5 TIL Chappelle Show’s The Mad Real World skit was inspired by his friend David Edward’s experience being kicked out of The Real World. The skit reversed the premise with a white guy driven crazy by black roommates and kicked out after they don’t “feel safe" — the same words used to evict Edwards.