Inner Cosmos with David Eagleman

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Latest Episodes:

Ep125 "Why do brains need friends?" (with Ben Rein) Oct 13, 2025

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Why do human brains need social interaction? Why might AI chatbots be insufficient to scratch the itch? What do we love so much about real human touch and in-person interaction? Why do so many of us live with dogs? From empathy to introversion to social media to isolation (and what to do about it), we’ve got it all this week with guest Ben Rein, author of the new book Why Brains Need Friends.

Ep124 "Why don't we notice gaps in time?" Oct 06, 2025

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How is your consciousness like a flame that continually goes out and gets re-lit? Why can you see other people's eyes move, but you can't see your own eyes move in the mirror? And what does any of this have to do with deep sleep, anesthesia, comas, amnesia, and empires of soft-bodied creatures that came before us? Tune in this week for some science that will shift your view of reality.

Ep123 "Will AI cure loneliness?" with Paul Bloom Sep 29, 2025

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On the one hand, AI companions are (increasingly) amazing at rectifying isolation. But on the other hand, loneliness is a biological signal that pushes us toward improving ourselves socially. So what's the right balance here? And does everyone have the same need to cure loneliness? In other words, might AI relationships mess up our young even while providing a critical lifeline to our seniors? Join this week as we dive deep with psychologist Paul Bloom.

Ep122 "Why do we so rarely say what we mean?" (with Steven Pinker) Sep 22, 2025

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Why do people on a date speak in innuendo? Why do dictators squelch protests? Why do humans stand apart from the rest of the animal kingdom by blushing, laughing, and crying? And what does any of this have to do with bullies, George Costanza, or cancel culture? Join this week with cognitive scientist Steven Pinker as we discuss his new book on common knowledge: “When Everyone Knows That Everyone Knows”.

Ep121 "What’s the secret to intelligence (in brains and AI)?" with Ramesh Raskar Sep 15, 2025

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Is AI going to go the same way as computing: from colossal LLMs owned by a few companies to billions of networked AI agents? How does that parallel one of the great underappreciated secrets of the human brain? Join this week with guest MIT Media Lab professor (and AI-decentralizer) Ramesh Raskar.

Ep120 "Will AI build us into better humans?" Sep 08, 2025

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Will AI end up building us into stronger, more talented humans? What might this have to do with linguistics, the movie Arrival, self-driving cars, debate, video games, elections, chess, and the ancient game of Go? Are we going to be taken over, or instead exposed to ideas and concepts that stretch the boundaries of our thinking? Join this week to see how AI might just up the human game.

Ep119 "Why do brains believe in the unbelievable?" with Bruce Hood Sep 01, 2025

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Why are brains superstitious? Would you wear a nice sweater that belonged to a murderer? What does this have to do with lucky socks, ghosts, our interpretation of coincidences, why kids often need their special blankets, and what any of this has to do with the brain? Join this week with guest Bruce Hood to learn why it's so natural for brains to take incomplete data and infer causes.

Ep118 "Why has the brain always been our hardest puzzle?" with Matthew Cobb Aug 25, 2025

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How have humans through the ages tried to crack the mysteries of the brain, and why are our theories always yoked to the most recent technologies? What does the history of brain science have to do with bumps on the skull, electricity, Frankenstein, animatronics, telegraphs, telephone exchanges, computers, and LLMs? What's the next metaphor we'll use to try to capture the brain’s magic? Join this week with guest Matthew Cobb.

Ep117 "What does brain science have to do with free speech? (with Greg Lukianoff)" (with Greg Lukianoff) Aug 18, 2025

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Most people claim to be in favor of free speech, but they often mean speech from their own side (and not whatever those crazy people on the other side want to say). But from the point of view of the brain, why does free speech need to be rigorously defended? What does this have to do with internal models, printing presses, college campuses, John Stuart Mill, online indecency, cultures of honor, Robinson Crusoe, cancel culture, the importance of literature, and why free speech makes everyone safer?

Ep116 " What is Color? Part 2: Why royals wear purple" Aug 11, 2025

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Are there new colors you could see? And why are they impossible to imagine before you've seen them? Can you lose your color vision? And what does any of this have to do with linguistic color terms, why the military likes colorblind people for a particular task, and why Eagleman suggests that the cultural history of Thailand was influenced by one single, unknown neurodivergent?

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