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95

TIL that alligators can use tools

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BrKnL TIL Ancient Roman spies used urine as invisible ink to write secrets between the lines of their official documents, hence the saying: "read between the lines." The messages appeared only when heated.
r0Zo TIL the reporter who broke the story about the CIA selling Cocaine in the US had his reputation smeared, career destroyed, and was found dead from TWO gunshot wounds to the head… it was ruled a suicide
O9yY TIL that the London Underground has its own implementation of the KERS (Kinetic Energy Recovery System), where the platforms are actually uphill from the surrounding track, so that the Kinetic Energy is turned into Gravitational Potential Energy, and recovered when the train leaves the station.
KO8w4 TIL that Tsunamis occasionally occur on Lake Michigan - often enough that experts are attempting to develop an early warning system for them. They have been deadly in the past.
5DxB TIL of Obsidian. A volcanic glass so sharp, many surgeons prefer obsidian to surgical steel