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Terence McKenna was born on November 16, 1946 in Eagle Pass, Texas. He was an American ethnobotanist, mystic, psychonaut, writer, and lecturer. He is best known for his work with psychedelic drugs, including psilocybin mushrooms, DMT, and ayahuasca. McKenna was also a proponent of the stoned ape theory, which posits that human intelligence was enhanced by the consumption of psilocybin mushrooms.