Beavis and Butthead Psychedelic Experience - signed by Timothy Leary. Timothy Francis Leary was an American psychologist and writer, known for his advocacy of psychedelic drugs. During a time when drugs such as LSD and psilocybin were legal, Leary conducted experiments at Harvard University under the Harvard Psilocybin Project, resulting in the Concord Prison Experiment and the Marsh Chapel Experiment. The studies produced some useful data, but Leary and his associate Richard Alpert were fired from the university due to the controversy surrounding their research.

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