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TIL King of Bohemia Charles IV, who commissioned the construction of Prague's Charles Bridge in the 14th century, was rumored to have ordered that egg yolks be added to enrich the mortar and strength the bridge's structure. Scientific evidence indeed found the presence of egg proteins in the mortar.

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ZodD TIL that a musical work was so disturbing that it almost caused a riot, with “yells for the music to stop, mixed with applause to hasten the end of the piece.” One performer recalled: “One woman … repeatedly banged her head on the front of the stage, wailing ‘Stop, stop, I confess.’”
AR7n TIL that velociraptors were only 3 feet tall, 30 lbs, and probably feathered. There is no evidence that they hunted in packs and it is believed that they were less intelligent than cats and dogs. The “velociraptors” in Jurassic Park were actually based on the species Deinonychus.
0d4L1 TIL About Montgomery Meigs, Quartermaster General of the Army: He was one of the principal architects of Arlington National Cemetery; the choice of its location, on Robert E. Lee's family estate, Arlington House, was partly designed as a gesture to humiliate Lee for siding with the Confederacy.
mrrE TIL: Harvard university students whose families earn below $60,000 a year receive free tuition which includes free room and board
W75Z9 TIL that Lee Harvey Oswald and President Teddy Roosevelt were 3rd cousins, 1x removed. Roosevelt’s maternal grandmother Susannah and Oswald’s great-grandfather Thomas Hepworth Sr. were siblings.