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TIL in 1098 (First Crusade), crusaders promised the Muslim population of Ma’arra safe conduct if they surrendered. The Muslims surrendered, then the crusaders immediately began to massacre almost the entire population of 20,000. The crusaders then resorted to cannibalism, eating the Muslims.

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Ljjd TIL that 2,4-dinitrophenol (DNP), a potent weight loss drug that raises body temperature to burn more calories, was used by Russian soldiers in WWII to very effectively survive extreme cold. They could also use it as an explosive.
bOKN TIL In 1990 NYC’s head D.A. oversaw the wrongful conviction of five 15 year-olds by using coerced confessions and intimidation tactics. In 2002, the real culprit confessed and to this day, the D.A. refuses to apologize to the men. She is now a multi millionaire author based on her legal expertise.
xvG5 TIL kale, broccoli, cabbage, brussel sprouts, collard greens, and Chinese kale are all actually the same species. They have been selectively bred like dog and cat varieties
XE4gD TIL that in 2013, the Bill and Melinda Gates Foundation paid a $100,000 grant to help fund research into thinner and stronger condoms made of Graphene
8LJa TIL Alberta, Canada has been virtually rat free for decades. The provincial government has maintained a successful rat extermination program since shortly after World War II.