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TIL that Sinclair Lewis wrote a satirical novel entitled ‘Main Street’ which criticized the close mindedness of a fictional small town in Minnesota. It was banned by the town of Alexandria (a small town in Minnesota), because they disagreed with it.

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ADvNd TIL of Pierre-Simon Laplace, often referred to as the French Newton, he is credited with translating the geometric study of classical mechanics to one based on calculus. Laplace was one of the first scientists to propose the existence of black holes and the theory of gravitational collapse.
VMNOQ TIL due to the speed of its orbit and rotation, Mercury's days are longer than its years.
9YkZB TIL Polar bears actually have black skin and clear hollow fur. The clear and hollow fur enables the sun rays to get to the black skin that keeps the polar bears warm in the cold climate.
vQJR TIL A passenger on a plane was sucked through a window after one of the engines exploded, damaging the aircraft. His remains were discovered 2 years later by a crew building a radio telescope in the desert.
1a6LX TIL Einstein theorised a machine to communicate with the future, the Tachyonic antitelephone.