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TIL of the K-ships -- a class of armed blimps used by the US Navy during WW2 for anti-submarine warfare operations against German U-boats. Only one K-ship was lost due to enemy action when the K-74 was shot down by machine gun fire from the submarine U-134 on the night of the 18th of July 1943

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5Yne8 TIL: Treatments invented at St. Jude have helped push the overall childhood cancer survival rate to more than 80%.
woKLW TIL: A pepperoni slicer can be both funny looking and insanely effective
6EB1J TIL that the forbidden fruit in the Bible is never defined as an apple. It is in fact a mistranslation that originates from the fact that the tree is defined as as "the tree of knowledge of good and evil" and that in Latin, mălum means evil while the very similar word mālum means apple.
wopl6 TIL that Kaffeklubben Island, the northernmost piece of land in the world at 83°39′N latitude, has flowers growing on it
8o4G TIL There is a rare type of lava called Natrocarbonatite. It’s so cold it glows only at night. It’s black, but within hours turns white.