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TIL Pavlov’s student Horsley Gnatt trained a dog to anticipate food with one tone, punishment with another, then gradually made the tones increasingly similar. Nick the dog became so anxious, whenever reminded of the lab or the tones, it would get nervous erections and spontaneously ejaculate.

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8e6JZ TIL about "Satan's Storm". In 1960 a rare meteorological event struck a small town in Texas. Around midnight a collapsing thunderstorm pummeled the town with 75+mph gust that were as hot as 140°f (60°c), and it continued for the next four hours.
DR6r TIL of the Latin phrase Amor fati which is loosely translated to “love of one’s fate”. It describes an attitude in which one sees everything that happens in their life, including suffering and loss, as good. It is characterized by an acceptance of the events or situations that occur
KOZDR TIL William Still, the father of the Underground Railroad, interviewed and kept records of every escaped slave he came across. Once, while interviewing a man, he discovered that the man was actually his long-lost brother.
Q49M TIL that the guards of the Tomb of the Unknowns do not wear rank insignia so that they do not outrank the soldiers buried in the tomb, whatever their ranks may have been.
E10NV TIL the Deadpool film was only given the green light after test footage shot by the directors two years earlier was mysteriously leaked online. At first Ryan Reynolds thought one of the directors had released the footage but whoever leaked the footage at 20th Century Fox still remains anonymous.