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Culture, from birth to death (metal)

24 oktober 2026 · 1 uur 48 min
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Culture can be a little hard to wrap our minds around. It's seemingly everywhere, enveloping us—but where is it exactly? What are its core properties? How does culture change? Why does it change? What tools and techniques should we be using to understand its vagaries? How can we illuminate this living, breathing, omnipresent, amorphous thing? Lees meer

My guest today is Dr. Jacob Foster. Jacob is a Professor of Informatics and Cognitive Science at Indiana University – Bloomington; he's also an External Professor at the Santa Fe Institute. For more than a decade now, Jacob has been bringing together different disciplinary strands to develop a theory of culture and a toolkit for studying it.

Here, Jacob and I talk about what culture is—and whether cultural ideas are, in an important sense, alive. We discuss Jacob's path through physics to complexity science to sociology and to cognitive science. We talk about the nature and value of computational thinking. We dig into Jacob's framework for thinking about culture as a set of chains that weave from mind to world and back, across time and space. We dig into a colossal new paper of Jacob's in which he and his co-authors characterize the dynamics of culture through the case of metal music—a genre that has been evolving, splintering, growing, and withering for more than 50 years.

Along the way, Jacob and I touch on metaphors for culture as dark matter, as amphibian, as a set of companion species, as living vines on a human trellis. We touch on foxes and hedgehogs; personal culture and public culture; how to be a wizard; ecological carrying capacity and cultural carrying; schismogenesis; the ideas of Sperber, Heidegger, Jung, and Culianu; ideal objects and morphodynamics; and how viewing culture as alive gives us a different stance toward the dead.

This is not my first chat with Jacob. As you'll hear, we overlapped in our undergraduate years, also in our postdoc years, and since 2018 have worked together at the Diverse Intelligen…
Island of the tool users

10 oktober 2026 · 1 uur 27 min
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Tool use is rare in the animal kingdom—but maybe not as rare as we once thought. Since Jane Goodall famously observed a chimpanzee fishing for termites, many new examples of animals using tools have come to light. Birds using sticks to forage for grubs. Sea otters using rocks to smash open mussels. Digger wasps using stones to close off their burrows. But as these examples mount, so do the scientific questions. What is tool use, really? What different forms does it take? Does it always imply a high degree of intelligence? And perhaps the biggest question of all: Why do some creatures use tools while so many others don't? Lees meer

My guest today is Dr. Alice Auersperg. Alice is a cognitive biologist at the University of Veterinary Medicine in Vienna. She and her lab study innovation, technical cognition, and tool use in animals—especially in a species of parrot known as the Goffin's cockatoo.

Here, Alice and I talk about her lab's recent work with a certain remarkable cow. We discuss the wide variation in definitions of tool use across studies, and why some kinds of tool use are perhaps more impressive than others. We walk through some of her lab's most striking findings about tool use in the Goffin's cockatoo: for example, the finding that these birds don't just use tools but also make them—and can make the same tool out of different materials; the finding that they learn to use tools from others; and the finding that they recognize in some way the value of tools. We dig into some of Alice's ideas about the big picture—why certain species use tools, and why so many tool users seem to live on islands. Along the way, Alice and I talk about whether tool use in birds is fundamentally different from tool use in primates; we talk about play and boldness; the allure of the sea mango; intrinsic motivation to combine objects; why tool use differs in captivity, at least in Great Apes; and why Goffin's cockatoos like to dunk their noodles in blueberry soy yogurt.

Before we get to i…
Cognitive offloading and its consequences

25 september 2026 · 1 uur 15 min
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For thousands of years—maybe for as long as we've been human—we've offloaded our thinking. We've counted on our fingers. We've carved tallies into bone. We've invented a long series of tools to help us reason, remember, and manage information—tools like abacuses, calendars, writing systems, calculators, smartphones, and many, many more. So cognitive offloading is hardly new—but the questions around it seem newly urgent. As cognitive technologies accumulate, as opportunities for offloading tempt us at every turn, as headlines warn of "digital dementia" and "cognitive surrender," it seems like a good time to take stock. Yes, cognitive offloading can save us time and effort. But what are its other consequences? Lees meer

My guest today is Dr. Sam Gilbert. Sam is a Professor of Cognitive Neuroscience at University College London. Sam and his colleagues have been trailblazers in the study of cognitive offloading—when we do it, why we do it, what it does for us and to us.

Here, Sam and I talk about what cognitive offloading is, how deep it goes in our species' history, and how it pervades our everyday lives. We talk about the different forms that offloading takes. We discuss why some people offload more than others, and why we offload in certain situations. We walk through three bodies of research on the consequences of cognitive offloading—research on the so-called Google effect, on the photo-taking impairment effect, and on the impact of using GPS to navigate. Of course, we also address the elephant in the room: How should we think about the possible dangers—and benefits—of cognitive offloading in the new era of AI?

Before we get to it, some news: We have re-launched the Many Minds newsletter, as a Substack! We'll be sharing each of our episodes there, as well as other morsels from time to time. We've been wanting to do this, in part, to give you a better way to engage with us—and with each other. Were there questions we should have asked? Are there connections you made that …
Coming of age in Ngogo

11 september 2026 · 1 uur 35 min
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It's a familiar story in many ways. A child is born, and for years afterward is adored and indulged and anchored to home and family. But then the child grows up and starts crossing that long threshold into adulthood. The transition proves—to say the least—a bit turbulent. Now when I say this story is familiar, I don't just mean familiar to us as human beings. After all, a similar story has long played out among our closest cousins, the chimpanzees. Lees meer

My guest today is Dr. Rachna Reddy. Rachna co-directs the longstanding Ngogo Chimpanzee Project in Uganda and is an incoming Assistant Professor of Psychology at the University of California, Berkeley. For more than a decade now, she has been closely observing the chimpanzees at Ngogo—and especially the adolescents.

Here Rachna and I talk about why adolescence—in all its intensity—is such a scientifically fascinating life-stage. We sketch the Ngogo research site, home to the largest group of chimpanzees ever studied. We unpack the different stages of chimpanzee life history. We zoom in on chimpanzee adolescence using a variety of different lenses—we talk about greetings, dominance hierarchies, grooming, social rejection, mentorship, deference, patrolling, female dispersal, and more. We discuss the so-called civil war that has taken root at Ngogo. And, finally, we talk about Rachna's in-progress novel (if that's the right word), which tells the story of one chimpanzee's coming of age in immersive detail.

I think you'll enjoy this one, folks. Chimpanzees offer us a kind of parallel universe, a funhouse mirror version of human life—one that is deeply relatable in some ways, and totally alien to us in others. And the parallels and non-parallels are arguably all the more striking in adolescence.

But before we get to it, one humble ask: As the new season of Many Minds ramps up, this would be a great time to support the show. You could do this by rating us, writing a review on Apple Podcasts or a comment on Spotify, or by d…
The natural history of linguistic diversity

28 augustus 2026 · 1 uur 33 min
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Thousands of languages are used around the world today, and this linguistic diversity is a precious part of our human heritage. But it's also more than that. Linguistic diversity provides clues—a vast crazy quilt of clues—about how language works, about how history has unfolded, about the dynamics of culture, and about the nature of the human mind. Lees meer

My guest today is Dr. Damián Blasi. Damián is an ICREA Research Professor based at the Center for Brain & Cognition at the Pompeu Fabra University in Barcelona. Over the last decade or so, Damián's emerged as one of the most innovative researchers in the study of language and linguistic diversity. He's been widely recognized for this work, and most recently was awarded the 2026 FABSS Early Career Impact Award from the Cognitive Science Society.

In this conversation, Damián and I talk about why scientists should care about linguistic diversity. We do a bit of linguistic diversity 101—how many languages there are, how we can enumerate them, how they vary. We discuss a recent paper in which Damián and his colleagues reconstructed the explosive rise and precipitous fall of human linguistic diversity over the last 12,000 years. We talk about the factors that drive language change. And we discuss how cognitive science relies too much on English and English speakers—and how this may be holding the field back.

Along the way, Damián and I touch on the Tower of Babel, a golden age of linguistic diversity, the human bite configuration, scientific aesthetics, whether children shape language, polygenetic theories of language evolution, the pace of language change, schooling, linguistic inequality and behemoth languages, and why Damián thinks that the possibility space of human language might be bigger and wilder than we currently imagine.

This is a special episode of the Many Minds podcast. As I mentioned, Damián is this year's winner of an award from the Cognitive Science Society, in recognition of his outstanding early-career c…
From the archive: Electric ecology

17 augustus 2026 · 1 uur 33 min
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Hi friends! We're still taking a bit of a summer pause. We'll be back at the end of August—in the meanwhile, enjoy this listener favorite from our archives! Lees meer

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[originally aired September 19, 2024]

There's a bit of a buzz out there, right now, but maybe you haven't noticed. It's in the water, it's in the air. It's electricity—and it's all around us, all the time, including in some places you might not have expected to find it. We humans, after all, are not super tuned in to this layer of reality. But many other creatures are—and scientists are starting to take note.

My guest today is Dr. Sam England. Sam is a sensory ecologist at the Natural History Museum in Berlin, and one of a handful of scientists uncovering some shocking things about the role of electricity in the natural world.

Here, Sam and I have a wide-ranging conversation about electroreception—which is the perception of electrical stimuli—and electric ecology—which is the study of the ecological roles of electricity. We talk about how an interest in electroreception first got started, and why it's recently resurged. We discuss aquatic electroreception versus aerial electroreception, active electroreception versus passive electroreception. We talk about how electroreception is actually kind of easy to evolve. Along the way, we consider electrolocation and, its analog in sound, echolocation. We touch on dolphins, sharks, echidnas, ticks, caterpillars, bees, and spiders. We zoom in on electrostatic pollination, and what is inarguably the coolest sounding anatomical structure known to biology: the ampullae of Lorenzini.

I think you'll enjoy this one, friends. As Sam describes here, electroreception is one of those "alien senses"—it really challenges the imagination. And electric ecology is one of those frontiers in our understanding of the natural world. So without further ado, here's my chat with Dr. Sam England. Enjoy!

A transcript of this episode is available here.

Notes and links

3:00 – For m…
From the archive: Varieties of childhood

31 juli 2026 · 1 uur 29 min
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Hi friends! We're taking a bit of a summer pause. We'll be back soon—in the meanwhile, enjoy this listener favorite from our archives! Lees meer

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[originally aired July 10, 2025]

Childhood is a special time, a strange time. Children are adored and catered to—they're given their own menus and bedrooms. They're considered delicate and precious, and so we cushion them from every imaginable risk. Kids are encouraged to play, of course—but very often it's under the watchful eye of anxious adults. This, anyway, is how childhood looks in much of the United States today. But is this the way childhood looks everywhere? Is this the way human childhoods have always been?

My guests today are Dr. Dorsa Amir and Dr. Sheina Lew-Levy. Dorsa is an Assistant Professor of Psychology & Neuroscience at Duke University, where she runs the Mind and Culture Lab. Sheina is an Associate Professor of Psychology at Durham University in the UK, where she co-directs the Forager Child Studies research group. Both Sheina and Dorsa have spent much of their careers thinking about how childhoods differ across cultures—and why.

In this conversation, I talk with Dorsa and Sheina about their fieldwork with indigenous groups in Ecuador and the Congo, respectively. We discuss the different ways that childhood differs in these places—for instance, in terms of parents' attitudes toward risk, in terms of the social structures and activities in which kids are embedded, and in terms of the freedom that children are granted. We discuss developmental psychology's "WEIRD problem." We talk about the quasi-autonomous cultures that children create among themselves—sometimes called "peer cultures"—and discuss how these kid-driven cultures end up shaping and benefit the larger community. Along the way, we touch on adult supremacy, adverse childhood experiences, walking the forest and climbing papaya trees, parenting norms, ding dong ditch and "nananabooboo", the pioneering work of the folklorists Iona and Peter Opie,…
From the archive: Philosophers on psychedelics

18 juli 2026 · 1 uur 41 min
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Hi friends! We're taking a bit of a summer pause. We will be back soon—in the meanwhile, enjoy this listener favorite from our archives! Lees meer

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[originally aired May 14, 2025]

Some call it the "psychedelic renaissance." In the last decade or so, interest in psychedelic drugs has surged—and not just among Silicon Valley types and psychiatrists and neuroscientists. It's also surged among a stereotypically soberer crowd: academic philosophers. The reasons are clear. With their varied and sometimes transformative effects, psychedelics raise ethical questions, epistemological questions, metaphysical questions, questions about the nature of experience and the nature of the mind.

My guest today is Dr. Chris Letheby. Chris is a philosopher of cognitive science at the University of Western Australia and the author of the 2021 book, Philosophy of Psychedelics.

Here, Chris and I talk about the so-called classic psychedelics—LSD, psilocybin, ayahuasca, and others—and how interest in them has gone through three distinct waves. We discuss the effects that these substances seem to have, in particular their capacity to treat certain psychiatric conditions and their tendency to induce "mystical-like" experiences. We consider the idea that psychedelics might serve as agents of moral enhancement. And we dig into the psychological and neural mechanisms by which psychedelics seem to have their diverse—and often salutary—effects. Along the way, we talk about ontological shock, comforting delusions, brain plasticity, unselfing, microdosing, placebo effects and adverse effects, physicalism and idealism, the REBUS model, environmental virtues, plant consciousness, meditation, and much more.

Maybe this is obvious but this episode is not just for the seasoned psychonauts out there. Whatever your personal experience with these substances, they offer a distinctive window into the mind—a new way of grappling with big questions. Perhaps this much is also obvious but we're not encouraging or…
The origins of Darwin's ideas

3 juli 2026 · 1 uur 19 min
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No discipline, no sphere of intellectual life, has been untouched by the work of Charles Darwin. He died in 1882 but his ideas are very much alive; they're now central to how we understand the natural world, the human mind, non-human minds, plants, biogeography, morality and emotion, culture, language, and more. But where did his ideas come from? How did they grow out of his travels, his social circle, his hobbies, his particular cast of mind? Lees meer

My guest today is Dr. Janet Browne. Janet is Professor Emerita at Harvard University in the department of the History of Science. She is perhaps best known for her widely acclaimed two-volume biography of Charles Darwin. And she has now published an updated and abridged single-volume version.

Here, Janet and I talk about Darwin's life and ideas. We pick up the story during his travels on the Beagle, a five-year voyage that laid the foundation for the rest of his career. We talk about what he was reading, what he was seeing, and how these experiences helped form his most influential work, On the Origin of Species. We discuss Darwin's style as a thinker, as a naturalist, as a writer, and as an experimentalist. We touch on his relationships with contemporaries like Charles Lyell and Alfred Russel Wallace. And we consider his long—and often overlooked—engagements with pigeons, barnacles, plants, and worms.

I greatly enjoyed Janet's two-volume biography of Darwin, and I enjoyed this new single-volume edition just as much. So if this episode sparks your interest, I heartily recommend that you check these books out.

Alright friends, on to my conversation with Dr. Janet Browne. Enjoy!

Notes

3:30 – Darwin's autobiography is available here. All of Darwin's letters are readable (and searchable) at the Darwin Correspondence Project.

11:00 – Darwin's account of his five-year stint on the HMS Beagle can be found in his book, The Voyage of the Beagle.

17:00 – Charles Lyell's Principles of Geology (Vol. 1).

27:00 – For a recently pu…
The sparkling deep

20 juni 2026 · 1 uur 20 min
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It's tempting to see bioluminescence as an oddity, one of those rare eccentricities of life on earth. And, on land, maybe that's true. But our planet is mostly water, and out in the open ocean bioluminescence is utterly commonplace. Creatures of all shapes and sorts sparkle and glow, glitter and pulse. But what are these displays for? Why did they evolve? How did light become the currency of the deep? Lees meer

My guest today is Dr. Sönke Johnsen. Sönke is a Distinguished Professor of Biology at Duke University, where he and his research group study the visual ecology of the ocean. He's the author of a number of books: most recently Into the Great Wide Ocean, about life in the pelagic realm, and The Radiant Sea, a photographic tour of bioluminescence and color, written in collaboration with Dr. Steven Haddock.

Here, Sönke and I talk about the open ocean: the most common habitat on our planet, yet one that many people will never experience. We consider the curious distribution of bioluminescence— rare on land, exceptionally prevalent in the ocean, and all but absent in freshwater. We talk about how bioluminescence seems to have evolved—many, many times over in fact. We survey the functions of making light in the deep—from counter-illumination to courtship to revenge. Finally, we consider what Sönke takes to be the biggest remaining puzzle about bioluminescence at sea.

Alright friends, if you're enjoying Many Minds, we ask (humbly) if you would think about rating us, reviewing us, leaving us a comment, boosting us on social media, or perhaps haranguing your friends—relentlessly—until they give us a listen.

Without further ado, onto my conversation with Dr. Sönke Johnsen. Enjoy!

Notes

3:30 – The scientific report by Dr. Johnsen and colleagues describing the bioluminescent octopus, Stauroteuthis syrtensis.

12:00 – A popular article on the bristlemouth. The article reports a scientist's estimate of "as many as a dozen [bristlemouths] per square meter of ocean."

15:00 – A …
Is Man the Hunter just a myth?

5 juni 2026 · 1 uur 32 min
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There's a story about of our past that you know well. It goes like this: At some point earlier in human evolution, we started to hunt. Men in particular—perhaps channeling some deep-seated aggressive impulses—began to seek out big game. This new food source, this bonanza of calories, was what allowed our brains to expand. It changed our bodies and our societies and sent our species off on a whole new track. In short, Man the Hunter made us human. This story—told in different versions, with different points of emphasis—has circulated for decades. It's been debunked and revived, rejected and reimagined. What is the history behind the Man the Hunter idea? How does it square with our current understandings of evolution? Is it, in fact, pure fiction? Lees meer

My guest today is Dr. Vivek Venkataraman. Vivek is an evolutionary anthropologist at the University of Calgary, and an editor-in-chief of the journal Hunter Gatherer Research. He and his collaborators recently published an article on the different layers and meanings of the Man the Hunter idea.

Here, Vivek and I lay out those meanings. We talk about how the phrase refers, first, to that popular myth about our evolution, but also to a landmark scientific conference in the 1960s, and to a major finding of research on contemporary hunter-gatherer groups—namely, that men generally do do most of the hunting. We do a little crash-course on the field of hunter-gatherer research, including the kinds of questions it asks and frameworks it uses. We dig into some of the key ingredients of the Man the Hunter myth: the idea that we have aggressive tendencies, the idea that only men hunt, and the idea that hunting played a transformative role in our evolution. We walk through three recent, high-profile studies challenging Man the Hunter ideas in various ways. And we talk about the ever-present danger of projecting our current norms and ideals back in time. Along the way, Vivek and I touch on 2001: A Space Odyssey; reasons why contempor…
Babies, dogs, and the riddles of word learning

22 mei 2026 · 1 uur 19 min
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It's kind of astonishing, really, that kids ever learn words. Each one poses a little riddle. Does this sound string refer to a person? A category of things? Or maybe some other feature of the blooming, buzzing world? And yet word learning happens. In fact, we now know it begins earlier in infancy than we realized. And we now know, further, that dogs (or at least some dogs) understand words as well. So how does this happen? What do babies and dogs really know about words? And how might we go about figuring this all out? Lees meer

My guests today are Dr. Elika Bergelson and Dr. Claudia Fugazza. Elika is an Associate Professor in the Department of Psychology at Harvard University, where her lab studies how infants learn language. Claudia is a Researcher at Eötvös Loránd University in Hungary, where she and her collaborators study dogs who are especially gifted word learners.

In this conversation, Elika, Claudia, and I talk about the thorny question of what it means to understand a word—and whether there are different degrees or kinds of understanding. We consider the challenges posed by different types of words—by nouns, by names, by verbs, by function words, size terms, and more. We discuss why it is that some dogs are so good at learning words, and why infants of a certain age seem to get so much better at it. We talk about learning in different contexts and situations. And we circle the question of how different word learning really is in dogs and babies.

Alright friends, before we get to it, one tiny ask: If you've been enjoying Many Minds, you can help us grow by leaving a review or comment or a rating, or by sharing us with a friend or colleague. We would greatly appreciate the support!

Without further ado, on to my interview with Claudia Fugazza and Elika Bergelson. Enjoy!

Notes

3:30 – A paper on infants' understanding of proper nouns like "Mommy."

6:00 – For our earlier audio essay on names across the animal kingdom, see here.

11:00 – For Dr. Bergelson's early …
The inner life of the hand

7 mei 2026 · 1 uur 10 min
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Newton saw in the human hand proof of the divine; Darwin saw a key to our species' success. Many others, too, have described the hand in hyperbolic terms, as a paragon of design, a cornerstone of human uniqueness, an engine of our achievements. But what makes the human hand so powerful? Is it the proportions of the fingers? Is it the opposability of the thumb? Or, could it be none of this? Could it be that the real power of our hands lies—not in the physical design—but elsewhere, out of sight? Lees meer

My guest today is Dr. Matt Longo. Matt is Professor of Cognitive Neuroscience at Birkbeck, University of London. He's the author of the recent book, The Invisible Hand, a wide-ranging tour of the human hand and how it's geared into the brain.

Here, Matt and I talk about the difference between the "visible hand"—that is, its physical structure—and the "invisible hand"—its representation in the brain. We consider the evolution of the visible hand and whether there really is anything truly distinctive or impressive about it. We talk about the biology of touch. We tour the invisible hand, discussing how—through cortical magnification—the hand becomes over-represented in the brain's sensory maps. We catalogue a few ways that the hands can go awry. And we talk about whether we should feel any nostalgia for all the hand-based activities and crafts that we're losing. Along the way, we also touch on star-nosed moles and raccoons; tetrapods and the primitive archetype; hand dominance; the parallel between a horse's knee and a human's wrist; tool use, plasticity and abstraction; homunculi; the rubber-hand illusion; supernumerary fingers; the Third Thumb project; and the question of what it might unlock if dolphins had hands.

Alright, friends, this is a fun one. On to my interview with Dr. Matt Longo!

Notes

3:00 – For discussion of the many traits and behaviors that have been proposed as uniquely human, see our earlier audio essay.

5:00 – For an example of the "if only dolphins had…
From the archive: The cuttlefish and its coat of many colors

23 april 2026 · 1 uur 34 min
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Hi friends! We're skipping a beat to take care of some spring housekeeping tasks. We will be back in May! In the meanwhile, enjoy this listener favorite from our archives! Lees meer

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[originally aired April 30, 2025]

We humans have a hard time becoming invisible. For better or worse, we're basically stuck with the skin and body we have; we're pretty fixed in our color, our shape, our overall appearance. And so we're fascinated by creatures that aren't—creatures that morph to meet the moment, that can functionally disappear, that can shape-shift on a dime. And no creatures are more skilled, more astonishing, more bedazzling in their abilities to do this kind of thing than the cephalopods. But how do they do this exactly? What's going on in their skin? What's going on under their skin? And what's going on in their brains that makes this all possible?

My guest today is Dr. Tessa Montague. Tessa is a neuroscientist in the Axel Lab at Columbia University; she studies the brain and behavior of the dwarf cuttlefish, with a special focus on the biology of their dynamic skin behaviors.

Here, Tessa and I talk about how cuttlefish and other cephalopods exhibit the most impressive camouflaging abilities on the planet. We discuss how they change their skin's appearance with remarkable speed and fidelity—and not just when trying to blend in, but also when hunting, courting, fighting, and more. We talk about whether these behaviors are flexible and whether they're voluntary. We linger on the cruel irony that cuttlefish seem to be colorblind. We talk about the idea that a cephalopod's skin is kind of a window into their brain. We lay out the cells and organs in the cephalopod skin the make these behaviors possible—especially the tiny pigment-bearing structures called "chromatophores." And of course we also dive deep into the cephalopod brain and its sometimes bizarre and poorly understood structures.

Excited to share it with you friends—I think you'll enjoy it. Without further ad…
Illuminating cave art

9 april 2026 · 1 uur 26 min
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Deep in our past, in the dark depths of caves, our ancestors did something strange and beautiful. Working by firelight, some doodled little designs. Others made hand stencils. Some saw a bulge of rock, or a crack in the wall, and thought to turn it into a horse or a bison. Why did they make this art? What did it mean to them? Who were these artists? These questions are old—very old—but thanks to new methods and new interpretive frameworks, archaeologists are beginning to see them in a new light. Lees meer

My guest today is Dr. Izzy Wisher. Izzy is an archaeologist at Aarhus University in Denmark, specializing in Paleolithic art.

Here, Izzy and I talk about why we in the present are so drawn to cave art. We lay out the basic timeline, geography, and categories of Paleolithic art. We consider the difference between figurative and non-figurative art, and why it might be that non-figurative art came first. We discuss hand stencils. We talk about an ongoing shift in archaeology known as the "sensory turn." We dig into some of Izzy's work on the role of pareidolia, palimpsests, and children in cave art. And we touch on an ongoing project she is involved in trying to understand the earliest symbolic marks that our species made—and what they could have been used for. Along the way we touch on the site known as El Castillo, Werner Herzog, hunting magic, why hand stencils are so often missing fingers, graffiti, tectiforms and flutings, why depictions of humans are actually quite rare in cave art, stages in children's art production, the use of virtual reality as a research method, and the idea of archaeology as world-building.

I think you'll enjoy this one friends. Who among us—after all—doesn't feel drawn to these caves, to these most enigmatic of human creations? Without further ado, here's my conversation with Dr. Izzy Wisher.

Notes

3:00 – For more on El Castillo cave, see here and here.

9:00 – Werner Herzog's film—Cave of Forgotten Dreams—is being briefly re-released in Apri…
What can AI teach us about the mind?

26 maart 2026 · 1 uur 21 min
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Everyone is talking about AI these days. Often these conversations are about how AI might upend education, or work, or social life, or maybe civilization itself. But among cognitive scientists and psychologists the conversation inevitably drifts toward other questions. What does this latest generation of AI tell us about the human mind? Is it putting old ideas and theories to rest? Is it ushering in new ones? Will AI—in other words—also upend cognitive science? Lees meer

My guests today are Dr. Mike Frank and Dr. Gary Lupyan. Mike is a Professor of Psychology at Stanford University, where his lab focuses on language learning and cognition in children. Gary is a Professor of Psychology at the University of Wisconsin–Madison, where his lab studies language and its role in augmenting human cognition. Both Gary and Mike have more recently been thinking a lot about AI and how it is challenging and deepening our understanding of the human mind.

In this conversation, we talk about being interested in AI as cognitive scientists—while also being concerned about the technology as people. We discuss the linguistic abilities of frontier LLMs compared to the linguistic abilities of adult humans. We talk about a glaring "data gap" here—the fact that, even though LLMs often rival human abilities, they require orders of magnitude more data to do so. We contrast the capabilities of large language models with so-called BabyLMs. We consider the fact that, as LLMs master language, they also master other abilities—capacities for mathematical reasoning, causal understanding, possibly theory of mind, and more. And we talk about why language might be an especially potent form of input for an AI. Along the way, we touch on reference and the symbol grounding problem, the Platonic Representation Hypothesis, stimulus computability, confabulated citations, pattern matching and jabberwocky, the poverty of the stimulus argument, congenital blindness, Quine's topiary, the limits of in principle demonstra…
Mutualisms all the way down

12 maart 2026 · 1 uur 9 min
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No one is an island. We all depend on each other in critical, often tangled ways. And when I say "we" and "each other" I don't just mean humans. Yes, we humans rely on other humans. But we also rely on bees, yeasts, dogs, bacteria, and countless other creatures big and small. These interspecies dependencies—or mutualisms, as biologists call them—have deflected and inflected our history. And there's no doubt they will also inflect our future. Lees meer

My guest today is Dr. Rob Dunn. Rob is Professor of Applied Ecology at North Carolina State University, where he studies the creatures and ecologies all around us—in our homes, in our foods, in our belly buttons. He's the author of eight books, including, most recently, The Call of the Honeyguide: What Science Tells Us about How to Live Well with the Rest of Life. This book is the focus of our conversation today.

Rob and I talk about the idea of mutualism—in which two or more species benefit each other—and how human life is sustained by mutualisms all the way down. We consider how the benefits of mutualism are measured—whether in terms of biological fitness, or longevity, or pleasure. We talk about the best-documented cases of humans collaborating with other species to find honey or hunt fish. We consider how our liaisons with yeasts have shaped human history—and how we might even say that yeasts domesticated us. We linger on our relationships with dogs and cats and the benefits we get from them, some obvious and some less so. Finally, we talk about what it would mean to more fully embrace our mutualisms, what it would mean to create what Rob calls "a less lonely future." Along the way, Rob and I talk about cheese, worms, and maggots; bread, beer, and honey; face mites and armpits; parasites, inquilines, and commensals; what sauerkraut does to our immune systems; honeyguides and dolphins, leopards and house cats; morbid curiosity; and how dogs might give us a kind of access to our subconscious.

This is a fun one folks. But, …
Seven metaphors for AI

26 februari 2026 · 56 min
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If you wanted a petri dish for understanding metaphors—how they emerge and evolve and jostle with each other—it would be hard to do better than the world of AI. We talk about AI systems variously as coaches or co-pilots, little genies or alien intelligences. Some researchers claim that AIs "grow," that they're entering their phase of "adolescence." Critics deride AI products as slop and dismiss LLMs as a kind of autocomplete on steroids. What's behind these different characterizations? Which ones are accurate and which are unfair? And are our metaphors mostly colorful rhetoric or do they matter? Are they shaping how we understand, adopt, and ultimately regulate these new technologies? Lees meer

My guest today is Dr. Melanie Mitchell. Melanie is a computer scientist and Professor at the Santa Fe Institute. She is the author of the book, AI: A Guide for Thinking Humans, and she writes a Substack by the same name.

This episode is a bit of a companion to our recent episode with Steve Flusberg. In that episode, Steve and I attempted a kind of crash course on metaphor and the human mind. Here, Melanie and I sit down for more of an extended case study: how metaphors are guiding, galvanizing, and maybe deceiving us in the contested realm of AI discourse. We unpack seven of the most widely used metaphors in this space. We consider how these metaphors are shaping not only our everyday understandings of AI, but also law and policy. We also talk about the metaphor and analogy capabilities of AI itself. Can these systems reason abstractly in the way that humans can? Along the way, Melanie and I touch on: AI-generated poetry, anthropomorphism, the original sin of AI research, the myth of Narcissus, psychometric testing and its pitfalls, metaphors for AI that are a bit hard to spot, and the question of whether an AI has ever come up with a decent analogy for itself.

Longtime fans of the show will know that we've had Melanie on the show once before. We invited her back, not only because …
Origins of the kiss

12 februari 2026 · 1 uur 1 min
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Humans do some pretty weird things. Some of us will sit in searingly hot rooms or jump into icy ponds. Others risk their lives trying to climb to new heights or dive to new depths. And every once in a while, two otherwise normal-seeming humans will lean in close to each other, open mouths, lock lips, and swap a hearty helping of microbes. You may even know people who've done this. But why? Are we the only animals who kiss? What could be the deeper origins of this truly bizarre behavior? Lees meer

My guest today is Dr. Matilda Brindle. Matilda is an Evolutionary Biologist at the University of Oxford. She's interested in understanding the origins of behaviors and traits across the animal kingdom. But it's not just any traits she's interested in—she tends to favor those that are a bit risque.

Here, Matilda and I talk about the puzzle at the heart of human kissing behavior. We discuss the possible adaptive functions of kissing—and of romantic kissing in particular. We walk through her recent paper in which—drawing on observations across primates species—she and her colleagues reconstructed the phylogeny of kissing behavior. They found that kissing is present in almost all the Great Apes—and also in several species of monkeys—and that it may go back around 20 million years. We sketch different proposals for how kissing may have evolved, such as the idea that it originally grew out of "premastication"—the practice of chewing up food for infants and transferring that food by mouth. And, of course, we consider the cultural side of kissing—and how to make sense of the fact that, despite these ancient roots in the primate lineage, romantic kissing is by no means universal to all human groups.

Hope you enjoy this one, friends—offered in spirit of Valentine's Day, of course. Kissing may seem like a light-hearted or frivolous topic, but—as I hope you'll appreciate—it opens up some big, thorny, compelling questions. And, in fact, it's finally attracting serious attention from scholars …
The aura of metaphor

29 januari 2026 · 1 uur 36 min
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Metaphors matter. They enliven our speech and our prose; they animate our arguments and stir our passions. Some metaphors power political movements; others propel scientific revolutions. These little figures of speech delight, provoke, captivate, shock, amuse, and galvanize us. In one way or another, metaphors just seem to help us make sense of a messy world. But how do they do all this? Whence their peculiar powers? What does it say about the human mind that we just can't escape our metaphors—and frankly don't want to? Lees meer

My guest today is Dr. Stephen Flusberg. Steve is an Assistant Professor of Cognitive Science at Vassar College, where he directs the Framing, Reasoning, And Metaphor (FRAME) Lab.

Here, Steve and I talk about what metaphors are and why we're so drawn to them. We discuss some of the misleading ideas about metaphor you may remember from middle school literature class. We consider why some metaphors work and others flop. We talk about the metaphors we use for climate change and prevalence and potency of war metaphors across different realms of public discourse. We consider how metaphor operates in science and in scientific theorizing. Finally, we talk about the question of whether there are some ideas that we simply can't grasp literally, concepts we can only approach through metaphor.

Along the way, Steve and I talk about: "aura farming"; nautical metaphors and textile metaphors; the outmoded idea that metaphors are mere adornments; metaphor versus analogy; dead metaphors and how to resuscitate them; shadows and footprints; Dan Dennett's technique of metaphorical triangulation; and the brain-as-computer metaphor—and whether it is actually a metaphor.

Alright, friends this is a fun one. Steve has spent his entire career exploring this fascinating terrain—and, as you'll see, he's a lively and affable guide. Hope you enjoy it as much as I did. Without further ado, here's my conversation with Dr. Steve Flusberg.

Notes

3:00 – For more on "beige flags,…
From the archive: How should we think about IQ?

15 januari 2026 · 1 uur 34 min
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Hello friends, and happy new year! We're gearing up for a new run of episodes starting later in January. In the meanwhile, enjoy this pick from our archives. Lees meer

------

[originally aired October 16, 2024]

IQ is, to say the least, a fraught concept. Psychologists have studied IQ—or g for "general cognitive ability"—maybe more than any other psychological construct. And they've learned some interesting things about it. That it's remarkably stable over the lifespan. That it really is general: people who ace one test of intellectual ability tend to ace others. And that IQs have risen markedly over the last century. At the same time, IQ seems to be met with increasing squeamishness, if not outright disdain, in many circles. It's often seen as crude, misguided, reductive—maybe a whole lot worse. There's no question, after all, that IQ has been misused—that it still gets misused—for all kinds of racist, classist, colonialist purposes. As if this wasn't all thorny enough, the study of IQ is also intimately bound up with the study of genetics. It's right there in the roiling center of debates about how genes and environment make us who we are. So, yeah, what to make of all this? How should we be thinking about IQ?

My guest today is Dr. Eric Turkheimer. Eric is Professor of Psychology at the University of Virginia. He has studied intelligence and many other complex human traits for decades, and he's a major figure in the field of "behavior genetics." Eric also has a new book out this fall—which I highly recommend—titled Understanding the Nature-Nurture Debate. In a field that has sometimes been accused of rampant optimism, Eric is—as you'll hear—a bit more measured.

In this conversation, Eric and I focus on intelligence and its putatively genetic basis. We talk about why Eric doubts that we are anywhere close to an account of the biology of IQ. We discuss what makes intelligence such a formidable construct in psychology and why essentialist understandings of it are so intui…
From 'On Humans': Can the brain understand itself?

31 december 2025 · 1 uur 1 min
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Hello there, friends! We hope you're having a restful holiday, or a lively holiday, or whatever mix of those you prefer. As the year draws to a close, we at Many Minds are taking a much needed pause ourselves. But we wanted to share with you an episode from a podcast that we've been following for some time called On Humans. It's hosted by Ilari Mäkelä. It looks at humanity from all angles to understand where we come from and where we're going. The episode we're sharing features an interview with biologist and historian of science, Matthew Cobb; he's also the author of the book, The Idea of the Brain: The Past and Future of Neuroscience. In it, Ilari and Matthew take a zoomed-out view of the human brain and of our quest to understand it. This episode is actually part of a 5-part mini-series that On Humans did all about the human brain. So if you enjoy it, you may want to check out that broader series. Lees meer

Alright friends, have a great close of 2025 and a great start to 2026. We'll see you in January with our first episode of the new year. In the meanwhile, enjoy this offering from our friends at On Humans.

The original show notes for this On Humans episode can be viewed here. You can follow the On Humans podcast through their newsletter or on Bluesky.
In search of names

18 december 2025 · 29 min
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Alright, friends—we've come to the end of the 2025 run of Many Minds! Lees meer

Our final episode of the year is an audio essay by yours truly. This is a classic format for the show, one that we only do every so often. Today's essay is about names. It's about the question of whether animals have something like names for each other. And it's also about a deeper question: What even is a name? How do humans use names? How does the historical and ethnographic record kind of complicate our everyday understanding of what names are. I had a lot of fun putting this together, and I do hope you enjoy it.

Now, the holiday season is a time when people might be shopping around for new podcasts to listen to. That makes it a great time to recommend us to your friends and family and colleagues. You can think of it as an especially thoughtful gift, one that's absolutely free, and that keeps on giving throughout the year.

Speaking of gifts, as an addendum to this episode you'll find a little stocking stuffer after the credits. It's a reading of a poem that figures prominently in today's essay.

Without further ado, here is my essay—'In search of names.' Enjoy!

A text version of this essay is available here.

Notes

2:00 – The text of 'The Naming of Cats' by T.S. Eliot is here. See also the full collection, Old Possum's Book of Practical Cats. The lines about cats' taste preferences and cats having different kinds of minds comes from another poem in the collection, 'The Ad-Dressing of Cats.'

3:00 – The 2019 study finding that cats know their names, and the 2022 study showing that cats know the names of their friends.

4:00 – For an overview of research on dolphin "signature whistles," see here.

5:00 – For the 2024 study reporting name-like rumbles in elephants, see here.

6:00 – For the 2024 study reporting vocal labels for individuals in marmosets, see here. A critical response to the study is here; the authors' response to the criticism is here.

12:00 – For overviews of cross-cultural…
The value of animal cultures

4 december 2025 · 1 uur 12 min
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Not long ago culture was considered rare in nature, maybe even uniquely human. But that's changed. We now know that the tree of life is buzzing with culture—and not just on a few lonely branches. Creatures great and small learn songs, migration routes, and feeding techniques from each other. Many species build up reservoirs of knowledge over generations. This has profound implications, not just for our understanding of the natural world, but also for our efforts to protect it. Lees meer

My guest today is Dr. Philippa Brakes. Philippa is an Honorary Lecturer at the University of Exeter, with one foot in science and another in conservation. She's both a behavioral ecologist, focusing on whales and dolphins, and a leading voice—for more than a decade now—urging conservationists to take animal cultures seriously.

Here, Philippa and I talk about how researchers define culture and social learning in animals. We tour the mounting evidence for culture across species—in birds, in apes, in fish, possibly even in insects. We discuss the methods that scientists use to infer that behaviors are socially learned. We consider how animal culture complicates the conservation enterprise. We also discuss the idea that animal cultures have intrinsic value—not value for us humans, not value that can be easily quantified, but value for the animals themselves. Along the way Philippa and I talk about the notion of "cultural rescue"; indigenous understandings of animal culture; cases where social learning is maladaptive; human-animal mutualism; fashion trends; the idea of conserving "cultural capacity"; elephant matriarchs and other "keystone individuals"; golden lion tamarins, herring, and regent honey-eaters; and the question of why some orcas wear salmon as hats.

Alright friends, this topic has been on our wish list for a while now. Hope you enjoy it!

Notes

2:30 – For academic articles by Dr. Brakes and colleagues on the importance of animal culture for conservation, see here, here, and here.…
What is memory for?

20 november 2025 · 1 uur 24 min
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Everyone loves a good evolutionary puzzle. Why do we have appendices? Why do we dream? Why do we blush? At first glance, memory would not seem to be in this category. It's clearly useful to remember stuff, after all—to know where to find food, to remember your mistakes so you don't repeat them, to recall who's friendly and who's fierce. In fact, though, certain aspects of memory—when you hold them up to the light—turn out to be quite puzzling indeed. Lees meer

My guests today are Dr. Ali Boyle and Dr. Johannes Mahr. Ali is a philosopher at the London School of Economics (LSE); Johannes is a philosopher at York University, in Toronto. Both have written extensively about the functions of memory, and, in particular, about the functions of episodic memory—that capacity for calling up specific events and experiences from our own lives.

Here, Ali, Johannes and I lay out the textbook taxonomy of memory, and discuss how episodic memory has drawn the lion's share of philosophical interest. We pick apart the relationship between episodic memory and another major type of long-term memory, semantic memory. We sketch a range of different accounts of the evolved functions of episodic memory, including Johannes's proposal that episodic memory serves communication and Ali's proposal that it fuels semantic memory. And, finally, we consider what this all means for our understanding of memory in children and in animals. Along the way, we touch on Highly Superior Autobiographical Memory, infantile amnesia, evidential systems in language, imagination, "simulationist" theories of episodic memory, what it feels like to remember, collective memory, the hippocampus, cryptomnesia, and the cow's digestive system as a metaphor for memory.

If you're enjoying Many Minds, you might consider leaving us a rating or review on your platform of choice, or maybe giving us a shout-out on social media. Thanks so much in advance for supporting us, friends!

Notes

4:30 – For a broad orientation to memory resear…
Of breeds and brains

6 november 2025 · 1 uur 8 min
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It's hard to say exactly when, but some tens of thousands of years ago, our best friends were born. I'm referring, of course, to dogs. This didn't happen overnight—it was a long process. And it not only changed how those canids behaved and what they looked like, it also changed their brains. As wolves gave way to proto-dogs, and proto-dogs gave way to dingoes and dalmatians and Dobermanns and all the rest, their brains have continued to change. What can we learn from this singular saga? What does it tell us about dogs, about domestication, and about brains? Lees meer

My guest today is Dr. Erin Hecht. Erin is an Assistant Professor in the Department of Human Evolutionary Biology at Harvard, where she directs the Canine Brains Project.

Here Erin and I talk about how dogs are the most anatomically diverse species on the planet—and how their brains are no exception. We sketch the different waves in the dog domestication saga and discuss scenarios for how that saga got underway. We talk about how brains change as they get bigger and about how they change during domestication. We discuss a recent study by Erin and colleagues comparing the brains of modern dogs with the brains of pre-modern dogs like village dogs and New Guinea singing dogs. We also talk about a new study from Erin's lab finding that domestic dogs share with humans a key language-related structure. Along the way we talk about the Russian Farm Fox experiment, the stereotype of the gentle giant, the left lateralization of language, the respiratory condition known as BOAS, the dog personality inventory known as C-BARQ, the limitations of the idea of a "domestication syndrome," and the puppy kidnapping hypothesis.

Longtime listeners will recall that we had Erin on the show to talk about her work on fermentation and brain evolution. Given how much fun we had with that one, it was only a matter of time before we had her back to talk about her main line of research on dog brains. So here you go friends—hope you enjoy i…
Monsters and their makers

23 oktober 2025 · 1 uur 6 min
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It seems we've always had monsters among us. We've long been enthralled by dragons and giants, by the likes of Frankenstein and Godzilla and Dracula, by witches and werewolves and countless others. They roam our maps and creation myths; they crop up in our dreams, in our children's books, in our political rhetoric. Where do these beings spring from? What do they do for us? How have they changed over time? And, ultimately, what do our monsters say about their makers? Lees meer

My guests today are Dr. Natalie Lawrence and Dr. Surekha Davies. Both are historians of science and authors of recent books on monsters: Natalie's book is Enchanted creatures: Our monsters and their meanings. Surekha's book is Humans: A monstrous history.

Here, Surekha, Natalie, and I talk about monsters as category breakers and boundary walkers—and about how monstrosity is in the eye of the beholder. We walk through a menagerie of monsters—from the apocryphal blemmyes of old travelogues, to a hairy-faced girl in 16th century France, to the figure of Caliban in The Tempest. We discuss the psychological and cultural forces that generate monsters. And we talk about whether anyone would want to live in a world without them.

Along the way, we touch on the "monstrification" of social groups; psychoanalysis; our primal fear of snakes; curiosity cabinets; therianthropes and the Cave of the Three Brothers; the relationship between monstrosity and geography; our long fascination with so-called monstrous births; the Muppet Show; dinosaurs and sea creatures; and the question of what monsters might do for children in particular.

Alright friends, it's the monstrous season and this is a fun one to help you celebrate. Enjoy!

Notes

3:00 – Grendel's mother has often been a subject of critical discussion and adaptation. See, for instance, the 2018 novel, The Mere Wife.

12:30 – For a classic history-of-science treatment of "wonders" (including monsters) and our conceptions of nature, see here.

18:30 – For those un…
The age of social AI

9 oktober 2025 · 1 uur 24 min
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AI therapists and caregivers. Digital tutors and advisors and friends. Artificial lovers. Griefbots trained to imitate dead loved ones. Welcome, to the bustling world of AI-powered chatbots. This was once the stuff of science fiction, but it's becoming just the stuff of everyday life. What will these systems do to our society, to our relationships, to our social skills and motivations? Are these bots destined to leave us hollowed out, socially stunted, screen-addicted, and wary of good-old-fashioned, in-the-flesh human interaction? Or could they actually be harnessed for good? Lees meer

My guest today is Dr. Henry Shevlin. Henry is a philosopher and AI ethicist at the Leverhulme Centre for the Future of Intelligence (CFI) at Cambridge University. In a series of recent papers, Henry has been exploring this brave new world of "social AI" and its philosophical, ethical, and psychological dimensions.

Here, Henry and I sketch the current landscape of social AI—from dedicated platforms like Replika and CharacterAI to the more subtly social uses of ChatGPT and Claude. We consider several tragic cases that have recently rocketed these kinds of services into public awareness. We talk about what's changed about AI systems—quite recently—that's now made them capable of sustained relationships. We linger on the possible risks of social AI and, perhaps less obviously, on the possible benefits. And we consider the prospects for regulation. Along the way, Henry and I also talk about his 81-year-old father, his teenage self, and, of course, the kids these days; we consider whether social AI, in its potential harms, is more like social media or more like violent video games; we talk about "deskilling" and it's opposite "upskilling"; and we of course take stock of a certain elephant in the room.

Alright friends, this is a fun one. We've been wanting to explore this dawning age of social AI for some time. And we finally found, in Henry, the right person to do it with. Enjoy!

Notes

3:00 – …
Brains of a feather

25 september 2025 · 1 uur 31 min
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Birds do the darnedest things. They fly, of course. They sing. They hunt in pitch darkness. They hide their food and remember where they put it. They use tools and migrate over astonishingly vast distances—sometimes even sleeping while in flight. How do they do all this? What's going on in their brains that makes these and other remarkable behaviors possible? How did their evolutionary path mold them into the incredible creatures they are today? Lees meer

My guests today are Dr. Andrew Iwaniuk and Dr. Georg Striedter. Andrew is a comparative neuroscientist and Associate Professor at the University of Lethbridge in Canada. Georg is a Professor of Neurobiology and Behavior at the University of California, Irvine. Together they are the authors of the new book, Bird Brains and Behavior: A Synthesis (available open access here).

Here, Georg, Andrew, and I consider the deep history of birds—how they skirted the mass extinction event that felled the dinosaurs, and then radiated out into the 11,000 plus species we know today. We talk about how bird brains differ from those of mammals and reptiles—in terms of their size, but also in terms of their major structures, and in terms of their wrinkliness. We tour some of the most peculiar and perplexing bird behaviors, and consider their neural and anatomical underpinnings. Finally, we consider what we can learn from bird brains, not just about birds but about brains in general—how they evolve, how they get wired up, how they do and do not vary. Along the way we touch on barn owls, hummingbirds, megapodes, mallards, pigeons, parrots, starlings, and underestimated waterfowl; we touch on how birds' brains change with the seasons; the enduring mystery of magnetoreception; the possibility of olfactory maps; the optocollic reflex; the social intelligence hypothesis and the extractive foraging hypothesis; precocial versus altricial bird species; split-body gynandromorphy; and the future of non-invasive work in bird neuroscience.

Season 7 of M…
How nature restores the mind

11 september 2025 · 1 uur 25 min
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One afternoon you decide to snub your responsibilities and go for a hike. You spend a few hours in the woods or the mountains. You study the bark of trees, you bathe in birdsong, you let your eyes roam along a distant ridgeline. And you come back feeling better, restored somehow—like you have more energy, more patience, more bandwidth. We've all, I'm guessing, had experiences like this. But what's behind these effects? Why would nature restore us? What's the evidence that it really does? And what is even being restored, actually? Lees meer

My guest today is Dr. Marc Berman. Marc is an Associate Professor in the Department of Psychology at the University of Chicago where he directs the Environmental Neuroscience Lab. Marc is also the author of a new book, Nature and the Mind: The Science of How Nature Improves Cognitive, Physical, and Social Well-Being.

Here, Marc and I talk about Attention Restoration Theory—the idea that nature experiences restore our limited capacity for directed attention. We discuss the broader field of "environmental neuroscience," which Marc helped kickstart and continues to lead. We range across studies from Marc's lab that show nature's beneficial effects—on attention, on mood, and on health. We talk about what the active ingredients in nature seem to be. And we discuss the field's prospects for understanding how nature impacts not just the mind, but the brain itself. Along the way, Marc and I touch on: soft versus harsh fascination; the elusive concept of "mental energy"; trees, wood, fire, and rain; the architect and theorist Christopher Alexander; the value of fake plants; fractalness in space and time; curvature and spirituality; and how nature tends to steer our thoughts in certain directions.

Needless to say, we're stoked to be kicking off a new season of Many Minds. If you're new to the show, welcome! If you're already a fan, perhaps you'd consider leaving us a rating or a review on your platform of choice. It really does help us reach new …
From the archive: Revisiting the dawn of human cognition

4 september 2025 · 56 min
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Hi friends! Lees meer

We're taking a much-needed summer pause—we'll have new episodes for you later in September. In the meanwhile, enjoy this pick from our archives!

-------

[originally aired June 1, 2023]

There's a common story about the human past that goes something like this. For a few hundred thousand years during the Stone Age we were kind of limping along as a species, in a bit of a cognitive rut, let's say. But then, quite suddenly, around 30 or 40 thousand years ago in Europe, we really started to come into our own. All of a sudden we became masters of art and ornament, of symbolism and abstract thinking. This story of a kind of "cognitive revolution" in the Upper Paleolithic has been a mainstay of popular discourse for decades. I'm guessing you're familiar with it. It's been discussed in influential books by Jared Diamond and Yuval Harari; you can read about it on Wikipedia. What you may not know is that this story, compelling as it may be, is almost certainly wrong.

My first guest today is Dr. Eleanor Scerri, an archaeologist at the Max Planck Institute for the Science of Human History, where she heads the Pan-African Evolution research group. My second guest is Dr. Manuel Will, an archaeologist and Lecturer at the University of Tübingen in Germany. Together, Eleanor and Manuel are authors of a new paper titled 'The revolution that still isn't: The origins of behavioral complexity in Homo sapiens.' In the paper, they pull together a wealth of evidence showing that there really was no cognitive revolution—no one watershed moment in time and space. Rather, the origins of modern human cognition and culture are to be found not in one part of Europe but across Africa. And they're also to be found much earlier than that classic picture suggests.

Here, we talk about the "cognitive revolution" model and why it has endured. We discuss a seminal paper from the year 2000 that first influentially challenged the revolution model. We talk about the latest evidence of com…
From the archive: Of molecules and memories

22 augustus 2025 · 1 uur 15 min
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Hi friends! Lees meer

We're taking a much-needed August pause—we'll have new episodes for you in September. In the meanwhile, enjoy this pick from our archives!

_____

[originally aired February 8, 2024]

Where do memories live in the brain? If you've ever taken a neuroscience class, you probably learned that they're stored in our synapses, in the connections between our neurons. The basic idea is that, whenever we have an experience, the neurons involved fire together in time, and the synaptic connections between them get stronger. In this way, our memories for those experiences become minutely etched into our brains. This is what might be called the synaptic view of memory—it's the story you'll find in textbooks, and it's often treated as settled fact. But some reject this account entirely. The real storehouses of memory, they argue, lie elsewhere.

My guest today is Dr. Sam Gershman. Sam is Professor of Psychology at Harvard University, and the director of the Computational Cognitive Neuroscience Lab there. In a recent paper, he marshals a wide-ranging critique of the synaptic view. He makes a compelling case that synapses can't be the whole story—that we also have to look inside the neurons themselves.

Here, Sam and I first discuss the synaptic view and the evidence that seems to support it. We then talk about some of the problems with this classic picture. We consider, for example, cases where memories survive the radical destruction of synapses; and, more provocatively, cases where memories are formed in single-celled organisms that lack synapses altogether. We talk about the dissenting view, long lurking in the margins, that intracellular molecules like RNA could be the real storage sites of memory. Finally, we talk about Sam's new account—a synthesis that posits a role for both synapses and molecules. Along the way we touch on planaria and paramecia; spike-timing dependent plasticity; the patient H.M.; metamorphosis, hibernation, and memory transfer; the pioneerin…
From the archive: Consider the spider

7 augustus 2025 · 1 uur 18 min
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Hi friends! Lees meer

We're taking a much-needed August pause—we'll have new episodes for you in September. In the meanwhile, enjoy this pick from our archives!

_____

[originally aired May 30, 2024]

Maybe your idea of spiders is a bit like mine was. You probably know that they have eight legs, that some are hairy. Perhaps you imagine them spending most of their time sitting in their webs—those classic-looking ones, of course—waiting for snacks to arrive. Maybe you consider them vaguely menacing, or even dangerous. Now this is not all completely inaccurate—spiders do have eight legs, after all—but it's a woefully incomplete and drab caricature. Your idea of spiders, in other words, may be due for a refresh.

My guest today is Dr. Ximena Nelson, Professor in the School of Biological Sciences at the University of Canterbury, in New Zealand. Ximena is the author of the new book, The Lives of Spiders. It's an accessible and stunningly illustrated survey of spider behavior, ecology, and cognition.

In this conversation, Ximena and I do a bit of 'Spiders 101'. We talk about spider senses—especially how spiders use hairs to detect the minutest of vibrations and how they see, usually, with four pairs of eyes. We talk about web-making—which, by the way, the majority of spiders don't do—and silk-making—which all do, but for more reasons than you may realize. We talk about how spiders hunt, jump, dance, pounce, plan, decorate, cache, balloon, and possibly count. We talk about why so many spiders mimic ants. We take up the puzzle of "stabilimenta". We talk about whether webs constitute an extended sensory apparatus—like a gigantic ear—and why spiders are an under-appreciated group of animals for thinking about the evolution of mind, brain, and behavior.

Alright friends, this one is an absolute feast. So let's get to it. On to my conversation with Dr. Ximena Nelson. Enjoy!

A transcript of this episode is available here.

Notes and links

3:00 – A general audience article about our "…
The shaman with a thousand faces

24 juli 2025 · 1 uur 18 min
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When you hear the word "shaman," I'm guessing a web of associations starts to form in your mind. Perhaps you imagine strange ceremonies and strong substances; maybe you think of an earlier time when magic and superstition reigned. But shamanism is not just some relic of the past, or a curio from exotic lands. It's part of our present, and it will almost certainly be part of our future. This is because the roots of shamanism lie within us all. Lees meer

My guest today is Dr. Manvir Singh. Manvir is an Assistant Professor of Anthropology at the University of California, Davis and a regular contributor to The New Yorker. He's also the author of a new book—Shamanism: The Timeless Religion.

Here, Manvir and I talk about his fieldwork with Mentawai shamans in Indonesia. We discuss what makes a shaman a shaman and consider the cognitive building blocks that make shamanism so widespread and so appealing. We discuss the shamanic origins of Abrahamic religions. We consider how, over the course of history, shamanism has repeatedly resurged, despite attempts to snuff it out. And we also talk about the various forms and flavors that shamanism takes in contemporary Western societies. Along the way, Manvir and I touch on: drumming, fasting, and the "dark tent"; Jesus; experimental Edens; witches, prophets, and messiahs; glossolalia; disenchantment and re-enchantment; the rise of neoshamanism; Paleolithic rock art; hedge wizards and tech CEOs; Western exceptionalism; and the routinization of charisma.

If you enjoy this episode, I highly recommend that you check out Manvir's book—it's a captivating blend of narrative and ideas and it goes far beyond what we were able to talk about here. I'll also flag that this is Manvir's second time on Many Minds. Back in July of 2020 we had another conversation—broader in scope—where we talked about shamanism but also Manvir's work on witches, stories, and music. So you might check that one out as well.

Alright friends, on to my conversation with Dr. …
Varieties of childhood

10 juli 2025 · 1 uur 29 min
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Childhood is a special time, a strange time. Children are adored and catered to—they're given their own menus and bedrooms. They're considered delicate and precious, and so we cushion them from every imaginable risk. Kids are encouraged to play, of course—but very often it's under the watchful eye of anxious adults. This, anyway, is how childhood looks in much of the United States today. But is this the way childhood looks everywhere? Is this the way human childhoods have always been? Lees meer

My guests today are Dr. Dorsa Amir and Dr. Sheina Lew-Levy. Dorsa is an Assistant Professor of Psychology & Neuroscience at Duke University, where she runs the Mind and Culture Lab. Sheina is an Associate Professor of Psychology at Durham University in the UK, where she co-directs the Forager Child Studies research group. Both Sheina and Dorsa have spent much of their careers thinking about how childhoods differ across cultures—and why.

In this conversation, I talk with Dorsa and Sheina about their fieldwork with indigenous groups in Ecuador and the Congo, respectively. We discuss the different ways that childhood differs in these places—for instance, in terms of parents' attitudes toward risk, in terms of the social structures and activities in which kids are embedded, and in terms of the freedom that children are granted. We discuss developmental psychology's "WEIRD problem." We talk about the quasi-autonomous cultures that children create among themselves—sometimes called "peer cultures"—and discuss how these kid-driven cultures end up shaping and benefit the larger community. Along the way, we touch on adult supremacy, adverse childhood experiences, walking the forest and climbing papaya trees, parenting norms, ding dong ditch and "nananabooboo", the pioneering work of the folklorists Iona and Peter Opie, teaching, toys, and the enduring question of what childhood is for.

Alright friends, lots to think about here. On to my conversation with Sheina Lew-Levy and Dorsa Amir. Enjoy…
Science, AI, and illusions of understanding

26 juni 2025 · 1 uur
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AI will fundamentally transform science. It will supercharge the research process, making it faster and more efficient and broader in scope. It will make scientists themselves vastly more productive, more objective, maybe more creative. It will make many human participants—and probably some human scientists—obsolete… Or at least these are some of the claims we are hearing these days. There is no question that various AI tools could radically reshape how science is done, and how much science is done. What we stand to gain in all this is pretty clear. What we stand to lose is less obvious, but no less important. Lees meer

My guest today is Dr. Molly Crockett. Molly is a Professor in the Department of Psychology and the University Center for Human Values at Princeton University. In a recent widely-discussed article, Molly and the anthropologist Dr. Lisa Messeri presented a framework for thinking about the different roles that are being imagined for AI in science. And they argue that, when we adopt AI in these ways, we become vulnerable to certain illusions.

Here, Molly and I talk about four visions of AI in science that are currently circulating: AI as an Oracle, as a Surrogate, as a Quant, and as an Arbiter. We talk about the very real problems in the scientific process that AI promises to help us solve. We consider the ethics and challenges of using Large Language Models as experimental subjects. We talk about three illusions of understanding the crop up when we uncritically adopt AI into the research pipeline—an illusion that we understand more than we actually do; an illusion that we're covering a larger swath of a research space than we actually are; and the illusion that AI makes our work more objective. We also talk about how ideas from Science and Technology Studies (or STS) can help us make sense of this AI-driven transformation that, like it or not, is already upon us. Along the way Molly and I touch on: AI therapists and AI tutors, anthropomorphism, the culture and…
The primeval soil of play

12 juni 2025 · 57 min
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Puppies wrestling and mock-biting each other. Toddlers playing hide and seek. Kittens pouncing—repeatedly—on a toy mouse. You've no doubt looked on at scenes like this with amusement. And you've no doubt seen some of those viral videos—of ravens sledding down hills, of bumble bees playing with balls. All these moments make us smile, maybe even giggle. But the scientific questions they raise merit serious attention. Where do we see play in the animal kingdom? Where do we not? What functions does play serve? Do we—and many other creatures—have an elemental need for play? Lees meer

My guest today is Dr. Gordon Burghardt. Gordon is a longtime Professor in the Department of Psychology and the Department of Ecology and Evolutionary Biology at the University of Tennessee. For decades now, Gordon has been a pioneer in the study of animal play, with a particular focus on play in reptiles and other animals not usually considered playful. His 2005 book, The Genesis of Animal Play, remains a landmark in the field.

Here, Gordon and I talk about the major types of play: locomotor play, object play, and social play. We discuss the five criteria he has proposed for recognizing play across animal taxa. We survey several of the functions of play that have been proposed over the decades, and discuss how—in the end—play doesn't seem to have just one function. We also talk about human play—about what sets it apart, and about the possibility that play lies at the root of many of the capacities and institutions we think of as distinctively, impressively human. Along the way, Gordon and I touch on play in bears, pythons, turtles, fruit flies, and octopuses. We consider play between members of taxonomically distant species. We talk about "self-handicapping"; the surplus resource theory of play; the importance of "risky play" and "free play"; the immersive quality of play; bodily and vocal play signals in mammals; and whether human play is increasingly endangered.

Without further ado, here's my co…
The big five and beyond

29 mei 2025 · 1 uur 47 min
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If you've heard anything about the study of human personality, you've probably heard about the "big five." This is a framework that attempts to characterize human personality in terms of five broad factors or dimensions—neuroticism, extraversion, openness, conscientiousness, and agreeableness. The big five framework has been enormously influential, generating heaps and heaps of data, and study after study on the stability of personality, on the factors that shape our personalities, on how our personalities predict success and satisfaction. But is the big five really the best we can do? What does it miss? What does it mask? Where should the science of human personality go next? Lees meer

My guest today is Dr. René Mõttus. René is Professor of Psychology at the University of Edinburgh, and a leading researcher in the scientific study of human personality. He's also one of the hosts of the Personality Psychology Podcast.

Here, René and I talk about the history and colossal success of the "big five." We consider whether personality is ultimately rooted in our biology—and, if so, how. We dwell on each of the five factors and dig into the facets and nuances within them. These are, actually, technical terms in the field for the more granular aspects of personality that sit within each of these broad dimensions. We talk about personality change across the lifespan, and what factors seem to be driving it. We talk about personality and occupation, personality and birth order, personality and gender. Along the way, René and I touch on the Myers-Briggs; an alternative to the Big 5 known as the HEXACO model; the power of explicit questionnaires over experiments; the concept of "personality age"; the social investment theory; honesty, humility, humor, jealousy; life satisfaction; gene-environment correlations; and why evolutionary stories about personality seem to fail.

Alright friends, I think you'll like this one. On to my conversation with Dr. René Mõttus. Enjoy!

A transcript of th…
Philosophers on psychedelics

15 mei 2025 · 1 uur 41 min
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Some call it the "psychedelic renaissance." In the last decade or so, interest in psychedelic drugs has surged—and not just among Silicon Valley types and psychiatrists and neuroscientists. It's also surged among a stereotypically soberer crowd: academic philosophers. The reasons are clear. With their varied and sometimes transformative effects, psychedelics raise ethical questions, epistemological questions, metaphysical questions, questions about the nature of experience and the nature of the mind. Lees meer

My guest today is Dr. Chris Letheby. Chris is a philosopher of cognitive science at the University of Western Australia and the author of the 2021 book, Philosophy of Psychedelics.

Here, Chris and I talk about the so-called classic psychedelics—LSD, psilocybin, ayahuasca, and others—and how interest in them has gone through three distinct waves. We discuss the effects that these substances seem to have, in particular their capacity to treat certain psychiatric conditions and their tendency to induce "mystical-like" experiences. We consider the idea that psychedelics might serve as agents of moral enhancement. And we dig into the psychological and neural mechanisms by which psychedelics seem to have their diverse—and often salutary—effects. Along the way, we talk about ontological shock, comforting delusions, brain plasticity, unselfing, microdosing, placebo effects and adverse effects, physicalism and idealism, the REBUS model, environmental virtues, plant consciousness, meditation, and much more.

Maybe this is obvious but this episode is not just for the seasoned psychonauts out there. Whatever your personal experience with these substances, they offer a distinctive window into the mind—a new way of grappling with big questions. Perhaps this much is also obvious but we're not encouraging or endorsing the use of psychedelics here—just offering a little fuel for your intellectual fires!

Alright friends, on to my conversation w/ Dr. Chris Letheby. Enjoy!

A transcrip…
The cuttlefish and its coat of many colors

1 mei 2025 · 1 uur 34 min
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We humans have a hard time becoming invisible. For better or worse, we're basically stuck with the skin and body we have; we're pretty fixed in our color, our shape, our overall appearance. And so we're fascinated by creatures that aren't—creatures that morph to meet the moment, that can functionally disappear, that can shape-shift on a dime. And no creatures are more skilled, more astonishing, more bedazzling in their abilities to do this kind of thing than the cephalopods. But how do they do this exactly? What's going on in their skin? What's going on under their skin? And what's going on in their brains that makes this all possible? Lees meer

My guest today is Dr. Tessa Montague. Tessa is a neuroscientist in the Axel Lab at Columbia University; she studies the brain and behavior of the dwarf cuttlefish, with a special focus on the biology of their dynamic skin behaviors.

Here, Tessa and I talk about how cuttlefish and other cephalopods exhibit the most impressive camouflaging abilities on the planet. We discuss how they change their skin's appearance with remarkable speed and fidelity—and not just when trying to blend in, but also when hunting, courting, fighting, and more. We talk about whether these behaviors are flexible and whether they're voluntary. We linger on the cruel irony that cuttlefish seem to be colorblind. We talk about the idea that a cephalopod's skin is kind of a window into their brain. We lay out the cells and organs in the cephalopod skin the make these behaviors possible—especially the tiny pigment-bearing structures called "chromatophores." And of course we also dive deep into the cephalopod brain and its sometimes bizarre and poorly understood structures.

Excited to share it with you friends—I think you'll enjoy it. Without further ado, here's my chat with Dr. Tessa Montague.

A transcript of this episode is available here.

Notes and links

3:00 – For more on Dr. Montague's recent expeditions to the Philippines, including photos, see here.

7:3…
Life, free energy, and the pursuit of goals

17 april 2025 · 1 uur 7 min
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You've probably come across the "free energy principle." It's become one of the most influential ideas in the broader cognitive sciences. Since the neuroscientist Karl Friston first introduced it in 2005, the theory has been fleshed out, extended, generalized, criticized, and cited thousands and thousands of times. But what is this idea, exactly? What does it say about the nature of brains and minds? What does it say about the phenomenon of life itself? And is anything that it says really that new? Lees meer

My guest today is Dr. Kate Nave. Kate is a philosopher at the University of Edinburgh and the author of the new book, A Drive to Survive: The Free Energy Principle and the Meaning of Life. In the book, Kate offers an extended critical analysis of the free energy principle and situates it in a broader landscape of ideas about the nature of life and mind.

In this conversation, Kate and I talk about how the free energy principle has changed over time, from its beginnings as a theory of cortical responses in the brain to its eventual status as a theory of... well, a lot. We discuss why this theory has had such an enormous influence, and we talk about how many of the key ideas behind it actually have a long history. We consider some kindred spirits of the free energy framework— approaches like cybernetics, enactivism, predictive processing, and autopoiesis. We walk through a series of questions that all these approaches have long grappled with. Questions like: What does it mean to be alive? What is the relationship between being alive and being cognitive? What are the roles of prediction and representation in cognition? And we ask how—if it all—the free energy principle gives us new answers to these old questions. Along the way, Kate and I touch on: surprisal, visual phenomenology, vitalism, Husserl and Merleau-Ponty, Maturana and Varela, pendulums and bacteria, computation and models, primordial purposiveness, pancakes, and whether we'll ever be able to create artificial l…
Universal emotions in fact and fiction

3 april 2025 · 1 uur 20 min
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Are human emotions universal? Or do they vary from one place to the next and from one time period to the next? It's a big question, an old question. And every discipline that's grappled with it brings its own take, its own framings and forms of evidence. Some researchers appeal to cross-cultural experiments; others turn to neuroimaging studies or conceptual analysis. Some even look to fiction. Lees meer

My guest today is Dr. Bradley Irish, an Associate Professor of English Literature at Arizona State University. Brad is the author of a new book, The Universality of Emotion: Perspectives from the Sciences and Humanities; in it he maps the landscape of debate around this long-contested topic. Brad is also the author of numerous articles and books on the emotions in Shakespeare's plays, as well as in the work of other early modern authors.

Here, Brad and I talk about both sides of his work—his writing as an observer of cross-disciplinary debates about the universality of emotion and his writing as a scholar of literature. We sketch four prominent theories of emotions—basic emotions theory, appraisal theories, psychological construction theories, and social construction theories. We weigh the idea that some emotions are more universal than others. We talk about the role that language might play in our emotional experience. And we consider why many literary scholars tend to be deeply suspicious of claims about human universality. Along the way, Brad and I also touch on: the theory of ur-emotions, the aims of literary analysis; disgust, anger, schadenfreude, anxiety; frogs and public dissections; Shakespeare as a supposedly universal poet; and Brad's latest project on neurodiversity in literature.

If you're enjoying the show, we would be most grateful if you could give us a rating or review, maybe even a shout-out on your social media platform of choice. For those who listen on Spotify, you can also now leave comments on individual episodes—which is a great way to let us know w…
From the archive: Fermentation, fire, and our big brains

20 maart 2025 · 1 uur 6 min
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Hi friends, Lees meer

We're taking care of some spring cleaning this week. We'll be back in two weeks with a new episode. In the meantime, enjoy this favorite from our archives!

- The Many Minds team

–––––––––

[originally aired February 22, 2024]

Brains are not cheap. It takes a lot of calories to run a brain, and the bigger your brain, the more calories it takes. So how is it that, over the last couple million years, the human brain tripled in size. How could we possibly have afforded that? Where did the extra calories come from? There's no shortage of suggestions out there. Some say it was meat; others say it was tubers; many say it was by mastering fire and learning to cook. But now there's a newer proposal on the table and—spoiler—it's a bit funky.

My guests today are Katherine Bryant, Postdoctoral Fellow at Aix-Marseille University, and Erin Hecht, Assistant Professor in the Department of Human Evolutionary Biology at Harvard. Katherine, Erin, and another colleague are the authors of a new paper titled 'Fermentation technology as a driver of human brain expansion.' In it, they argue that fermented foods could have provided the caloric boost that allowed our brains to expand.

Here, we talk about how the human body differs from the bodies of other great apes, not just in terms of our brains but also in terms of our bowels. We discuss the different mechanisms by which fermented foods provide nutritional benefits over unfermented foods. We consider how fermentation—which basically happens whether you want it to or not—would have been cognitively easier to harness than fire. Along the way, we touch on kiviaq, chicha, makgeolli, hákarl, natto, Limburger cheese, salt-rising bread, and other arguably delectable products of fermentation.

This is a fun one friends. But before we get to it: a friendly reminder about this summer's Diverse Intelligences Summer Institute. This a yearly event in St Andrews, Scotland; it features a rich program of lectures and events devoted to…
Howl, grunt, sing

6 maart 2025 · 1 uur 14 min
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The tree of life is a noisy place. From one branch come hoots and howls, from another come clicks and buzzes and whines. And coming from all over you hear the swell of song. But what is all this ruckus about? Why do so many animals communicate with sound? What kinds of meaning do these sounds convey? And—beyond the case of human speech—do any of these sounds merit the label of "language"? Lees meer

My guest today is Dr. Arik Kershenbaum, a zoologist at Cambridge University. Arik is an expert on vocal communication across the animal kingdom and the author of the recent book Why animals talk: The new science of animal communication.

Here, Arik and I talk about why the acoustic medium is a popular choice for complex communication. We sketch a key difference between forms of communication that are purely expressive and forms that are also referential. We discuss, in turn, Arik's field research on wolves, hyraxes, and gibbons—and talk about what makes each of these animals such a revealing case study. We evaluate our prospects for quote unquote "translating" different kinds of animal communication, and we speculate about what communication systems could look like on other planets. Along the way, Arik and I touch on: noisy versus tonal sounds; short-range versus long-range communication; chorusing and duetting; simplicity and complexity; syntax and meaning; entropy; alarm calls; dolphins, orcas, and cuttlefish; and how you can tell that wolves take a certain pleasure in howling.

Without further ado, here's my chat with Dr. Arik Kershenbaum.

A transcript of this episode is available here.

Notes and links

6:30 – In the human case, of course, our most elaborated form of communication—language—comes in both spoken and signed forms. For more on the different modalities of human language, see, e.g., our earlier episode with Dr. Neil Cohn.

7:30 – The distinction between expressive and referential communication is perhaps most strongly associated with the linguist Roman Jakobson—se…
The development of evolution

20 februari 2025 · 1 uur 37 min
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Evolution is not what it used to be. A lot has changed since Darwin's day. In the first half of the 20th century, evolutionary theory was integrated with an emerging understanding of genetics. Late in the 20th century, biologists started taking seriously the idea that organisms don't just adapt to their environments, they change them. Recently, researchers have started to acknowledge the role of culture in evolutionary processes. And so slowly our understanding of evolution has been reconsidered, updated, expanded. And more updates are underway. But it's not just our understanding of evolution that has changed over time. Evolution itself has changed, too. Lees meer

My guest today is Dr. Kevin Lala. Kevin is an evolutionary biologist at the University of St Andrews in Scotland. Over his long career, Kevin has been at the forefront of key debates about—and updates to—evolutionary theory. He's known, for instance, for his pioneering work on niche construction as well as for his work on gene-culture co-evolution. In a new book titled Evolution Evolving, Kevin and his four co-authors present a new synthesis of evolution, one that places developmental processes front and center.

Here, Kevin and I sketch the notion of a "developmental bias" and why it's central to this new understanding of evolution. We talk about the orthodox gene-centric way of thinking about development—and what it gets wrong. We discuss so-called exploratory processes in development. We dig into the increasingly popular, but much debated construct of "evolvability." And we consider what this newest update to evolutionary theory might tell us about the origins of human cognition. Along the way, Kevin and I talk about floppy ears in mammals and fragmented faces in fish; symbionts and soft inheritance; Mary Jane West-Eberhard, Richard Lewontin, and August Weismann; development as an artist and evolution as curator; maps; plants; manual dexterity; brain size; and why evolution is a bit like walking on a trampolin…
String theories

6 februari 2025 · 1 uur 21 min
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Where would our species be without string? It's one of our most basic technologies—so basic that it's easy to overlook. But humans have used string—and its cousins rope, yarn, cordage, thread, etc.—for all kinds of purposes, stretching back tens of thousands of years. We've used it for knots and textiles and fishing nets and carrier bags and bow-strings and record-keeping devices. It's one of the most ubiquitous, flexible, and useful technologies we have. But we haven't only put string to practical purposes. We've also long used it to tickle our minds. Lees meer

My guest today is Dr. Roope Kaaronen. Roope is a cognitive anthropologist and postdoc at the University of Helsinki in Finland. Along with an interdisciplinary team, Roope recently conducted two studies that showcase the centrality of string in human culture. One is on the history and diversity of "string figures" (which are visual designs made with a loop of string held between the hands, often known to English speakers as "Cat's Cradle"). The other study is on the history and diversity of knots.

Here Roope and I discuss the deep history of string in human culture. We talk about the seemingly universal spread of string figures across the globe. We zoom in on one string figure in particular—the Jacob's ladder—which seems to be the most widespread string figure of all, despite its complexity. We talk about how both knots and string figures are related to the branch of mathematics known as "topology," and about how knots and string figures have evolved under different constraints. Finally, we discuss what our fascination with string designs might tell us about the human mind. And we lament the fact that much of our string-based cultural heritage is headed—quite rapidly—for extinction.

Just a reminder that applications are now open for the 2025 Diverse Intelligences Summer Institute or DISI. If you are an early career researcher and you like this show, you would probably like DISI. Actually, fun fact: our guest today…
The other half of the brain

23 januari 2025 · 1 uur
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Neurons have long enjoyed a kind of rock star status. We think of them as the most fundamental units of the brain—the active cells at the heart of brain function and, ultimately, at the heart of behavior, learning, and more. But neurons are only part of the story—about half the story, it turns out. The other half of the brain is made up of cells called glia. Glia were long thought to be important structurally but not particularly exciting—basically stage-hands there to support the work of the neurons. But in recent decades, at least among neuroscientists, that view has faded. In our understanding of the brain, glia have gone from stage-hands to co-stars. Lees meer

My guest today is Dr. Nicola Allen. Nicola is a molecular neuroscientist and Associate Professor at the Salk Institute in La Jolla, California. She and her lab study the role of glial cells—especially astrocytes—in brain function and dysfunction.

Here, Nicola and I talk about how our understanding and appreciation of glial cells has changed. We do a bit of Brain Cells 101, reviewing the main division between neurons and glia and then sketching the subtypes within each category. We discuss the different shapes and sizes of glial cells, as well as the different functions. Glia are an industrious bunch. They're involved in synapse formation and pruning, the production of myelin, the repair of injuries, and more. We also talk about how glial cells have been implicated in various forms of brain dysfunction, from neurodegeneration to neurodevelopmental syndromes. And how, as a result, these cells are attracting serious attention as a site for therapeutic intervention.

Well, it's that time of year again folks. Applications are now open for the 2025 Diverse Intelligences Summer Institute, or DISI. This is an intense program—highly interdisciplinary, highly international—for scholars and storytellers interested in all forms and facets of intelligence. If you like thinking about minds, if you like thinking about humans an…
A paradox of learning

9 januari 2025 · 1 uur 7 min
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How do we learn? Usually from experience, of course. Maybe we visit some new place, or encounter a new tool or trick. Or perhaps we learn from someone else—from a teacher or friend or YouTube star who relays some shiny new fact or explanation. These are the kinds of experiences you probably first think of when you think of learning. But we can also learn in another way: simply by thinking. Sometimes we can just set our minds to work—just let the ideas already in our heads tumble around and spark off each other—and, as if by magic, come away with a new understanding of the world. But how does this happen exactly? And does it only happen in humans? Lees meer

My guest today is Dr. Tania Lombrozo. Tania is a Professor of Psychology at Princeton University; she and her research group study learning, reasoning, explanation, belief, and more. In a recent paper, Tania outlines this puzzling alternative form of learning—learning by thinking, as it's known—and presents evidence that it happens in both humans and AIs.

In this conversation, Tania and I talk about her longstanding work on explanation, and how it led her to study this less-obvious form of learning. We zoom in on four flavors of learning by thinking—learning through explanation, through simulation, through analogy, and through reasoning. We talk about the evidence that machines also learn in this way, and we consider whether animals could, too. We discuss how to resolve the paradox at the heart of "learning by thinking": how it could be that reshuffling old bits of knowledge can actually lead to new understanding. Along the way, Tania and I touch on: chain-of-thought prompting in LLMs, the Reddit community 'Explain Like I'm Five,' the illusion of explanatory depth, the power of thought experiments, Darwin and Galileo, imagination and rationalization, how psychology and philosophy complement each other, and whether we can also learn—not just by thinking in our proverbial armchairs—but also by writing and talking.

So, hap…
From the archive: The octopus and the android

25 december 2024 · 1 uur 26 min
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Happy holidays, friends! We will be back with a new episode in January 2025. In the meantime, enjoy this favorite from our archives! Lees meer

-----

[originally aired Jun 14, 2023]

Have you heard of Octopolis? It's a site off the coast of Australia where octopuses come together. It's been described as a kind of underwater "settlement" or "city." Now, smart as octopuses are, they are not really known for being particularly sociable. But it seems that, given the right conditions, they can shift in that direction. So it's not a huge leap to wonder whether these kinds of cephalopod congregations could eventually give rise to something else—a culture, a language, maybe something like a civilization.

This is the idea at the center of Ray Nayler's new book, The Mountain in the Sea. It's both a thriller of sorts and a novel of ideas; it's set in the near future, in the Con Dao archipelago of Vietnam. It grapples with the nature of intelligence and meaning, with the challenges of interspecies communication and companionship, and ultimately with what it means to be human.

Here, Ray and I talk about how he got interested in cephalopods and how he came to know the Con Dao archipelago. We discuss some of the choices he made as an author—choices about what drives the octopuses in his book to develop symbols and about what those symbols are like. We consider the major human characters in his book, in particular two ambitious researchers who embody very different approaches to understanding minds. We also talk a fair bit about AI—another central character in the book, after all, is a super-intelligent android. Along the way, Ray and I touch on Arrival, biosemiotics, the nature of symbols, memory and storytelling, embodiment, epigenetics, cephalopod camouflage, exaptation, and the sandbox that is speculative fiction.

This episode is obviously something a little different for us. Ray is a novelist, after all, but he's also an intellectual omnivore, and this conversation, maybe more than…
Your brain on language

12 december 2024 · 1 uur 33 min
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Using language is a complex business. Let's say you want to understand a sentence. You first need to parse a sequence of sounds—if the sentence is spoken—or images—if it's signed or written. You need to figure out the meanings of the individual words and then you need to put those meanings together to form a bigger whole. Of course, you also need to think about the larger context—the conversation, the person you're talking to, the kind of situation you're in. So how does the brain do all of this? Is there just one neural system that deals with language or several? Do different parts of the brain care about different aspects of language? And, more basically: What scientific tools and techniques should we be using to try to figure this all out? Lees meer

My guest today is Dr. Ev Fedorenko. Ev is a cognitive neuroscientist at MIT, where she and her research group study how the brains supports language and complex thought. Ev and her colleagues recently wrote a detailed overview of their work on the language network—the specialized system in our brain that underlies our ability to use language. This network has some features you might have expected, and—as we'll see—other features you probably didn't.

Here, Ev and I talk about the history of our effort to understand the neurobiology of language. We lay out the current understanding of the language network, and its relationship to the brain areas historically associated with language abilities—especially Broca's area and Wernicke's area. We talk about whether the language network can be partitioned according to the subfields of linguistics, such as syntax and semantics. We discuss the power and limitations of fMRI, and the advantages of the single-subject analyses that Ev and her lab primarily use. We consider how the language network interfaces with other major neural networks—for instance, the theory of mind network and the so-called default network. And we discuss what this all tells us about the longstanding controversial c…

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Coming of age in Ngogo

The natural history of linguistic diversity

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The origins of Darwin's ideas

The sparkling deep

Is Man the Hunter just a myth?

Babies, dogs, and the riddles of word learning

The inner life of the hand

From the archive: The cuttlefish and its coat of many colors

Illuminating cave art

What can AI teach us about the mind?

Mutualisms all the way down

Seven metaphors for AI

Origins of the kiss

The aura of metaphor

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From 'On Humans': Can the brain understand itself?

In search of names

The value of animal cultures

What is memory for?

Of breeds and brains

Monsters and their makers

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Brains of a feather

How nature restores the mind

From the archive: Revisiting the dawn of human cognition

From the archive: Of molecules and memories

From the archive: Consider the spider

The shaman with a thousand faces

Varieties of childhood

Science, AI, and illusions of understanding

The primeval soil of play

The big five and beyond

Philosophers on psychedelics

The cuttlefish and its coat of many colors

Life, free energy, and the pursuit of goals

Universal emotions in fact and fiction

From the archive: Fermentation, fire, and our big brains

Howl, grunt, sing

The development of evolution

String theories

The other half of the brain

A paradox of learning

From the archive: The octopus and the android

Your brain on language