As Colorado embarks on its psychedelic experiment, people can now receive psilocybin-assisted therapy at healing centers. The state is also grappling with how to enable therapy with the psychedelic ibogaine, which has shown promise for treating addiction. The use of psychedelic-assisted therapy was a component of Colorado’s psychedelic law approved by voters in 2022. We share a conversation from the most recent Aspen Ideas Festival as part of our coverage, "The Trip," about Colorado’s psychedelic journey. Krista Tippett, who created and hosts the podcast “On Being,” interviewed Gül Dölen, a psychology professor at the University of California Berkeley and a leader in psychedelics research.