This podcast is from Hamilton Morris who did one of the best, if not the only, tv series about psychedelic drugs, Hamiltons Pharmacopeia.
He opens the podcast saying it's one of his best.
I talk with ethnomycologist Cullen Clark about his work describing two new Psilocybe species in Southern Africa and becoming the first outsider to observe and describe the use of Psilocybe species in African traditional medicine. Clark also provides an extended analysis of African cave art depicting mushroom use.