Magic mushrooms – or psilocybin - may be associated with tripping hippies and Woodstock, but they are now being studied as new treatments for depression and neurodegenerative diseases like Alzheimer’s. Is this Age of Aquarius medicine or something that could really work? Plus, the centuries-long use of psychedelics by indigenous peoples, and a discovery in California’s Pinwheel Cave offers new clues about the relationship between hallucinogens and cave art. Guests: Merlin Sheldrake - Biologist and the author of Entangled Life: How Fungi Make our Worlds, Change our Minds and Shape our Futures. Albert Garcia-Romeu - Assistant professor in the Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine David Wayne Robinson - Archeologist in the School of Forensic and Applied Sciences, University of Central Lancashire, U.K. Sandra Hernandez - Tejon Indian Tribe spokesperson