Why Did We Evolve to Feel Romantic Love? with Dr. Helen Fisher

In this special live episode, journalist and bestselling author Michael Pollan explains how a psychedelic experience “smudged the windshield” of his consciousness and started the search behind his new book, A World Appears. He explains the difference between sentience and consciousness and shares some surprising plant research: corn that solves mazes, plants that recognize their relatives, and anesthetics that knock out a Venus flytrap. Pollan’s exploration of consciousness reveals a central idea of the Perception Box, a framework developed by Elizabeth R. Koch for understanding the forces within us that shape how we see ourselves, relate to others, and move through the world.

Most of us feel like there's a "me" behind our eyes, a thinker of our thoughts and author of our choices. Author and Waking Up founder Sam Harris argues that when you look closely enough, that self disappears. Dr. Heather Berlin and Dr. Christof Koch dig into why the sense of self may be something the brain constructs moment to moment, and why free will, in Sam's view, doesn't hold up to either physics or careful attention. Along the way they explore what meditation and psychedelics reveal about the mind, why denying free will isn't fatalism, and why Sam sees that as grounds for optimism about how much we can change. Sam’s exploration into free will reveals a central idea of the Perception Box, a framework developed by Elizabeth R. Koch for understanding the forces within us that shape how we see ourselves, relate to others, and move through the world.

Theoretical physicist Dr. Michio Kaku joins hosts Dr. Heather Berlin and Dr. Christof Koch to explore what physics can teach us about consciousness and reality itself. Dr. Kaku argues that consciousness is best understood as feedback loops, shaping the walls of our own Perception Box™ long before we're aware of it. The conversation asks if quantum mechanics has anything to do with a "warm, wet" brain, illuminating a central idea of the Perception Box, a framework developed by Elizabeth R. Koch for understanding the forces within us that shape how we see ourselves, relate to others, and move through the world.

Stress researcher Dr. Elissa Epel explains why the goal isn't to eliminate stress but to get better at recovering from it. She says that a sharp, short stress response followed by real rest is the hallmark of a young, healthy nervous system. She breaks down the science of why chronic vigilance quietly ages our cells and shortens telomeres. Plus: why lying down can defuse an argument, how someone can recover from years of chronic stress, and why nature, ritual, and even a good nap belong in everyone's stress prescription. Dr. Epel's research reveals a central idea of the Perception Box, a framework developed by Elizabeth R. Koch for understanding the forces within us that shape how we see ourselves, relate to others, and move through the world.

Dr. Lisa Feldman Barrett, psychologist and neuroscientist, joins hosts Dr. Heather Berlin and Dr. Christof Koch to unpack her theory of constructed emotion: the idea that emotions aren't hardwired reactions but stories the brain builds to explain physical signals like a racing heart or a furrowed brow. Dr. Barrett explains why there's no universal facial expression for anger or fear, how the same racing heart can be read as fear or excitement depending on your Perception Box™, and why "you have more control over your interpretation than you think," even if that control takes practice to build.