On this day in Psychedelic History (Nov. 13, 1956), Czech psychiatrist Stanislav Grof underwent his first LSD session as part of a research study in Prague—and the experience changed the course of his life and the future of psychedelic therapy. Grof described the session as a “nuclear explosion” of consciousness that shattered his sense of self and opened a vast inner landscape he’d spend the next six decades studying. That single dose set him on the path to becoming one of the world’s most infl