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Harvard's "Good Friday Experiment" was a study of drugs and the mystical experience. It was conducted in 1962 and involved Ram Dass, a Harvard psychology student at the time. The experiment involved giving psilocybin, a psychedelic drug, to participants and then monitoring their experiences. The results of the experiment showed that psilocybin could induce mystical experiences, which are characterized by feelings of unity, interconnectedness, and transcendence.