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TIL of Kilroy Was Here, a popular meme that originated with US soldiers in World War 2 that was graffitied on landmarks as the soldiers moved on

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E1JD0 TIL about the Eisriesenwelt, a natural limestone and ice cave in Austria. It is the largest ice cave in the world, extending more than 42km and the frozen lake inside the cave, during the Second World War, was used by skating athletes to train for the Olympics.
W71vX TIL That BurgerKing is Going Out of Business. Where else can I find an oreo shake as good as theirs? No where!
9YKvX TIL The reason for Corona's unique smell is due primarily to the clear bottles, as they do not inhibit photo-oxidation as well as amber glass.
DQD1g TIL that due to airflow, all single rotor helicopters have the same speed limit 250 mph (402 km/h)
PYQbV TIL even animals like jellyfish that lack brains need to snooze. Biologists have discovered that like people, jellyfish hit the hay & have the same trouble we do waking up. Because these creatures are very low on the animal family tree, the work suggests that the ability to sleep evolved quite early