The Giants Shoulder

Dr. David E. Nichols, a medicinal chemist who synthesized research-grade psilocybin, MDMA and DMT and founded the Heffter Research Institute. He recounts making low-cost MDMA for clinical trials. They discuss psychedelics as therapeutic tools for PTSD, addiction and OCD. He critiques the DMT-pineal theory, explores how music shapes trips, and outlines challenges in translating compounds into approved medicines.

Robin Carhart-Harris, leading psychedelic researcher and founder of Imperial College’s Centre for Psychedelic Research, explains the Entropic Brain idea. He discusses how psychedelics scramble brain models, entropy as a consciousness marker, why the default mode network holds the ego together, differences between DMT and 5‑MeO‑DMT effects, and risks of commercializing psychedelic medicine.

Peter Brannen, award-winning science journalist and author, explains how CO2 shaped life, climate, intelligence, and extinctions. He traces CO2 from origin-of-life vents to planetary thermostats. He explores mass extinctions like the Permian, how life rewired Earth’s carbon cycle, and why today’s rapid CO2 rise is uniquely risky. Short, big-picture science on deep time and planetary change.

Dr. Erik Bekkers, associate professor in Geometric Deep Learning and mathematician exploring vision and consciousness. He discusses Biological Idealism and why neural activity may be appearance not cause. He explains autopoiesis as a potential line for consciousness. He warns about mistaking sophisticated AI behavior for real mindedness and explores geometric brain patterns like donut-shaped activity.

Dr. Ryan Smith, computational neuroscientist who builds predictive models of brain function. Dr. Mark Solms, neuropsychologist and author focused on affect and consciousness. They debate whether consciousness is raw feeling or complex cognition. They clash over architecture versus embodiment, whether current AI can feel, what machinery would need to have intrinsic goals, and empirical tests like blindsight and neuron-replacement.

Chris Frith, pioneering cognitive and social neuroscientist and Fellow of the Royal Society, explains why perception is a controlled hallucination and how brains build reality through social connection. He discusses predictive processing, schizophrenia’s insights into belief, consciousness as a social adaptation, shared mental models, and whether AI or octopuses can have minds like ours.

William B. Miller Jr., MD and evolutionary biologist who champions a cognition-first view of life. He argues cells are intelligent measuring agents, explores molecule-level and viral agency, and introduces the senome as cells’ sensory field. Conversations cover how cellular preferences reshape evolution, why cancer may be an intelligent system, and what this means for medicine, bioelectric patterning, and the limits of AI.

Dr. Julian Barbour, independent theoretical physicist and author who argues time is not fundamental. He discusses Shape Dynamics and how sequences of shapes can mimic change. He explains the Wheeler–DeWitt 'frozen' universe, the idea of time capsules that create the appearance of a past, and how consciousness might weave motion and color into a static mathematical world.

Dr. Michael Timothy Bennett, a computer scientist at Australian National University who wrote the thesis How to Build Conscious Machines, outlines a mathematical blueprint linking information processing to experience. He discusses how layers of selfhood and valuation create feeling. Short, punchy takes cover bioelectric signaling, liquid versus solid brains, cancer as breakdown of cellular cooperation, and what architectures might actually produce conscious machines.

Matt Segall, associate professor of philosophy, cosmology, and consciousness and author advocating panexperientialism. He argues consciousness is woven into reality, not produced by the brain. Discussion ranges from why neuroscience misses the point, to panpsychism’s roots in process thought, what nonhuman perspectives might feel like, and how psychedelics, information, and metaphysics reshape our view of mind and ethics.