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TIL That an FBI Informant Recorded His Calls with FBI Agents that Proves the FBI knew the 1993 WTC Bombing was Going to Happen

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8a5a8 TIL that 19th century New York City was so lousy with oysters, they were typically sold for cheap from street carts for the working class. The remaining shells were then used as pavement for roads, crushed into mortar paste for construction, or burned for lime.
EdVd TIL that a child only displaying redeye in one eye in a photograph, should be immediately checked for retinolastoma, a cancer of the retina.
5mLR TIL that the term “goody two shoes” comes from a children’s story about an orphan girl who was so poor she could only afford one shoe
pYaNb TIL that Coober Pedy, the town in Australia famous for Opal mines and underground houses (built to escape the heat) literally translates in the aboriginal language to "white man in a hole".
WKP8 TIL the shape of the first supersonic airplane, the Bell X-1, was based on the Browning .50 caliber machine gun bullet, which was known to be stable in supersonic flight.