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TIL of the Iron Pillar of Delhi, an ancient, 23 ft solid pillar of near pure iron, that has resisted corrosion due to an unusual corrosion resistant layer. It also survived a direct canon ball strike in the 1700s from Muslim invaders.

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Vgom TIL that Vatican state owns a observatory telescope in south-west Arizona
vr98 TIL “Growing the beard” is the polar opposite of “Jumping the shark” and describes the moment a TV Series became awesome.
9YEgX TIL of Project Stormfury. Ran by the US government in 1962, it was an attempt to weaken tropical cyclones by flying aircraft near the eye walls, and “seeding” them with silver iodide in hopes to freezing their inner structures. The project was a failure, and ended in 1983.
jNLJQ TIL that Frank Welker originally auditioned for the role of Shaggy on Scooby-Doo, and Casey Kasem auditioned for Fred. The actors were hired, with roles reversed, and the rest is animation history.
v1aK8 TIL that Americans threw $8.5m worth of silver coins into the sea before the fall of the Philippines. American and Filipino POW divers were coerced by the Japanese to recover it but they sabotaged the operation by secretly appropriating some portions of the haul to fund the Philippine Resistance.