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TIL professionals in psychology and related fields have long looked upon sarcasm negatively, particularly noting that sarcasm tends to be a maladaptive coping mechanism for those with unresolved anger or frustrations.

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xDkw TIL that LASIK eye surgery uses the same algorithm NASA created to dock space shuttles in order to properly align the laser to the eye.
XEvaQ TIL A future Chief Scientist of the U.S. Air Force decided to become an aviation engineer when as a boy admired the American planes dropping sweets to him and other kids during the Berlin Airlift. Dr. Yarymovych is also credited for initiation of the Global Positioning System - GPS
EwlP TIL former British Prime Minister Margaret Thatcher once called poverty “a personality defect”
E1XXw TIL John Cage's 4'33" composition in which no instruments are played was partially inspired by a visit to a sound-proof chamber at Harvard University. Expecting to hear complete silence, he instead heard the sounds of his own body functioning—therefore realizing the "impossibility of silence."
Y7ywA ITL Vin Diesel recorded over 1,000 variations of "I am Groot" for "Guardians of the Galaxy" to express different emotions. He also voiced the line in languages like Spanish, Italian, Russian and Mandarin for international releases!