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Today I Learned that the first large-scale use of Gutenberg's movable type press was to print thousands of "Indulgences" for the Catholic Church

Read more scarc.library.oregonstate.edu

via reddit.com

epQwE TIL of Erzsébet Papp, a Hungarian woman dubbed "The Nicotine Killer," poisoned 4 people with homemade nicotine between 1957–1958. Initially sentenced to life, she was later executed by hanging in 1962 after her crimes were uncovered when others were accidentally poisoned.
e010J TIL of Project Normandy, a secret plan by the Church of Scientology to take over the city of Clearwater, Florida, by infiltrating government offices and media centers.
a8jMM TIL that during WWII, the U.S. referred to uranium from the Shinkolobwe mine in the Belgian Congo as 'gems' and removed the mine from maps to maintain secrecy for the Manhattan Project
R5Yx7 TIL about the disturbing murder of Bridget Cleary, an Irish woman who was murdered by her husband (reportedly through immolation) because he thought she was a changeling (a type of fairie from Irish mythology) and that killing her would bring his wife back.
16GLX TIL that there are predatory snails that eat other snails