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by Steve Paulson
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We all know Timothy Leary, the high priest of ‘60s psychedelia, but his partner, Rosemary Woodruff Leary, has largely been forgotten. She also had a remarkable life, even breaking Leary out of prison with the help of the Weather Underground. Now, biographer Susannah Cahalan tells her story — from the heady Sixties to a life on the run for decades.Original Air Date: November 08, 2025Interviews In This Hour: Guests: Susannah CahalanNever want to miss an episode? Subscribe to the podcast.Want to hear more from us, including extended interviews and favorites from the archive? Subscribe to our newsletter.For more from Luminous: ttbook.org/luminous
Thomas Metzinger is a renowned German philosopher. He has a longtime fascination with psychedelics, stemming from his own experience and also from his work as an analytic philosopher. He says altered states of consciousness give us profound insights into the nature of the mind. And he believes modern society has an ethical imperative to foster a “culture of consciousness.”Original Air Date: August 02, 2025Interviews In This Hour: Guests: Thomas MetzingerNever want to miss an episode? Subscribe to the podcast.Want to hear more from us, including extended interviews and favorites from the archive? Subscribe to our newsletter.For more from Luminous: ttbook.org/luminous
Most psychedelic stories are highly personal, but there’s a different dynamic when two people share the experience — especially a married couple. Steve talks with theoretical physicist Marcelo Gleiser and clinical psychologist Kari Gleiser about their transformative experiences.Original Air Date: May 9, 2025Guests: Marcelo Gleiser, Kari GleiserNever want to miss an episode? Subscribe to the podcast.Want to hear more from us, including extended interviews and favorites from the archive? Subscribe to our newsletter.For more from Luminous: ttbook.org/luminous
Chris Timmerman is a neuroscientist with a deep interest in phenomenology—what’s actually happening in our minds during psychedelic experiences. He leads the DMT Research Group at Imperial College, where he’s found that a single psychedelic experience can transform a person’s belief system, often turning materialists into panpsychists. In this wide-ranging conversation, Steve talks with Chris about everything from fractals and ayahuasca ceremonies to whether scientists who study psychedelics should talk openly about their own experiences.Original Air Date: March 01, 2025Guests: Chris TimmermanMore from Luminous: ttbook.org/luminous
Buddhist meditation and psychedelic journeys have a lot of shared DNA—both take you deep inside your mind and can change your life. But many Buddhists say psychedelics violate the prohibition against intoxicants. Do they? Spring Washam straddles this divide as both a Buddhist teacher and founder of an ayahuasca church. Her own story is fascinating—how she’s merged these two practices.Original Air Date: January 25, 2025Guests: Spring WashamMore from Luminous: ttbook.org/luminous
There’s a huge question swirling around the really big psychedelic experiences. Are these mind-blowing trips just hallucinations – the brain shot full of chemicals, playing tricks on you - or do they crack open some transpersonal dimension of consciousness? Most scholars who study psychedelics won’t go anywhere near this question, and yet it’s central to how you interpret these experiences. If you’re in psychedelic-assisted therapy, you want to know if this glimpse of the divine was real or just some figment of your imagination. Philosopher Peter Sjöstedt-Hughes believes we need a metaphysics of psychedelics to explain these powerful experiences.Original Air Date: November 30, 2024Interviews In This Hour:Guests: Peter Sjöstedt-HughesFor more from Luminous: ttbook.org/luminous
Psychedelic people are practicing at the very edge of anyone else’s comfort zone,” says psychologist Katherine MacLean, author of the psychedelic memoir “Midnight Water.” MacLean was a pioneering psychedelic researcher at Johns Hopkins, who then left her job to pursue her own unconventional psychedelic journey. She talks with Steve Paulson about her work as a psychedelic guide, her personal history with psychoactive substances, and why she reveres the Mexican healer Maria Sabina.Original Air Date: August 30, 2024Guests: Katherine MacLeanFor more from Luminous: ttbook.org/luminous
Erik Davis’ “Blotter” is really three books in one: It’s about the way LSD tabs were embedded in blotter paper so they wouldn’t be detected by the authorities; it’s also a deep dive into the psychedelic underground; and finally, it’s an art book — gorgeously illustrated, with lots of very trippy blotter art. Steve talks with Erik about the wildness of psychedelic experiences and whether they reveal a deeper dimension of consciousness.Original Air Date: July 20, 2024Guests: Erik DavisFor more from Luminous: ttbook.org/luminous
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Are you ready for the psychedelic revolution? In the next few years, the FDA is likely to approve these mind-bending drugs for treating depression and post-traumatic stress disorder. Some states have already decriminalized psilocybin, the active ingredient in "magic" mushrooms.But for all the headlines, many questions are swirling around this psychedelic renaissance. How do we make these drugs effective, safe and accessible to the people who need the most help? And how can they be used ethically, when much of the knowledge about plant medicines comes from Indigenous cultures?Psychedelics also raise profound questions about the nature of consciousness and mystical experience. People often describe their psychedelic experiences as “more real” than everyday life. Is this just an illusion, or do these experiences tap into some deeper reality?In “Luminous,” TTBOOK executive producer Steve Paulson explores the philosophical and cultural implications of psychedelics."Luminous” is a series
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