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TIL that the "moving sofa problem" is an unsolved problem in mathematics. The "sofa constant" is the size of the largest object that can fit through a hallway with a right turn, and is somewhere between 2.2195 and 2√2

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aw7Dy TIL that each commercial airplane in the U.S. is struck by lightning more than once every year on average.
6Er8w TIL: In Kyōryū Sentai Zyuranger (The show that was the basis for Mighty Morphin Power Rangers) that Bandora (Rita Repulsa) is a Satan worshiping witch who sacrifices children because a dinosaur killed her child
69MQW TIL that American sculptor, Anna Coleman Ladd, crafted 185 face masks for returning First World War veterans with facial disfigurements from wounds.
VMeVp TIL the silent P in the word "ptarmigan" has absolutely no reason to be there. The bird's name comes from the Gaelic "tàrmachan" ("croaker"), but in 1684 the Scottish naturalist Robert Sibbald decided to add a p in front to make the word look more Greek.
VMVvQ TIL There has been an annual festival called 'Bob Dylan Festival' celebrated in the city of Shillong, Meghalaya, in India since 1972.