Animal, heal thyself
Many Minds
What happens to animals when they get sick? If they’re pets or livestock, we probably call the vet. And the vet may give them drugs or perform a procedure. But what about wild animals? Do they just languish in misery? Well, not so much. It turns out that animals—from bees to butterflies, porcupines to primates—medicate themselves. They seek out bitter plants, they treat wounds, they amputate limbs, they eat clay—the list goes on. This all raises an obvious question: How do they know to do this? How do they know what they know about healing and medicine? It also invites a related...
info_outline
The rise of machine culture
Many Minds
The machines are coming. Scratch that—they're already here: AIs that propose new combinations of ideas; chatbots that help us summarize texts or write code; algorithms that tell us who to friend or follow, what to watch or read. For a while the reach of intelligent machines may have seemed somewhat limited. But not anymore—or, at least, not for much longer. The presence of AI is growing, accelerating, and, for better or worse, human culture may never be the same. My guest today is . Iyad directs the at the Max Planck Institute for Human Development in Berlin. Iyad is a...
info_outline
How should we think about IQ?
Many Minds
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...
info_outline
Rethinking the "wood wide web"
Many Minds
Forests have always been magical places. But in the last couple decades, they seem to have gotten a little more magical. We've learned that trees are connected to each other through a vast underground network—an internet of roots and fungi often called the "wood wide web". We've learned that, through this network, trees share resources with each other. And we've learned that so-called mother trees look out for their own offspring, preferentially sharing resources with them. There's no question that this is all utterly fascinating. But what if it's also partly a fantasy? My guest today is ....
info_outline
Electric ecology
Many Minds
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 . 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...
info_outline
The nature of nurture
Many Minds
The idea of a "maternal instinct"—the notion that mothers are wired for nurturing and care—is a familiar one in our culture. And it has a flipside, a corollary—what you might call “paternal aloofness.” It's the idea that men just aren't meant to care for babies, that we have more, you know, manly things to do. But when you actually look at the biology of caretaking, the truth is more complicated and much more interesting. My guest today is . She is Professor Emerita of Anthropology at the University of California, Davis and the author of the new book, . In it, she examines...
info_outline
The space of (possibly) sentient beings
Many Minds
We may not know what it's like to be a bat, but we're pretty confident that it's like something—that bats (and other mammals) are sentient creatures. They feel pleasure and pain, cold and warmth, agitation and comfort. But when it comes to other creatures, the case is less clear. Is a crab sentient? What about a termite, or a tree? The honest answer is we just don't know—and yet, despite that uncertainty, practical questions arise. How should we treat these beings? What do we owe them? My guest today is . Jonathan is a Professor of Philosophy at the London School of Economics and the...
info_outline
From the archive: Cities, cells, and the neuroscience of navigation
Many Minds
Hi friends, we're still on a brief summer break. We'll have a new episode for you later in August. In the meanwhile, enjoy this pick from our archives! ---- [originally aired September 21, 2022] If your podcast listening habits are anything like mine, you might be out for a walk right now. Maybe you’re wandering the neighborhood, just blocks from home, or maybe you’re further afield. In either case, I’m guessing you’re finding your way without too much trouble—you’re letting some intuitive sense steer you, track how far you’ve gone, tell you where to go next. This inner navigator...
info_outline
From the archive: What does ChatGPT really know?
Many Minds
Hi friends, we're on a brief summer break at the moment. We'll have a new episode for you in August. In the meanwhile, enjoy this pick from our archives! ---- [originally aired January 25, 2023] By now you’ve probably heard about the new chatbot called . There’s no question it’s something of a marvel. It distills complex information into clear prose; it offers instructions and suggestions; it reasons its way through problems. With the right prompting, it can even mimic famous writers. And it does all this with an air of cool competence, of intelligence. But, if you're like me,...
info_outline
From the archive: Medieval monks on memory, meditation, and mind-wandering
Many Minds
Hi friends, we're on a brief summer break at the moment. We'll have a new episode for you in August. In the meanwhile, enjoy this pick from our archives! _____ [originally aired May 17, 2023] You know the feeling. You're trying to read or write or think through a project, maybe even just respond to an email, when your attention starts to drift. You may not even notice it until you've already picked up your phone or jumped tabs, until your mind has already wandered way off-piste. This problem of distraction has become a bit of a modern-day obsession. We now fret about how to stay focused, how...
info_outlineA cluster of brain cells in a dish, pulsing with electrical activity. A bee buzzing its way through a garden in bloom. A newborn baby staring up into his mother's eyes. What all these entities have in common is that we don't quite know what it’s like to be them—or, really, whether it's like anything at all. We don't really know, in other words, whether they’re conscious. But maybe we could know—if only we developed the right test.
My guest today is Dr. Tim Bayne. Tim is Professor of Philosophy at Monash University in Melbourne, Australia. He’s a philosopher of mind and cognitive science, with a particular interest in the nature of consciousness. Along with a large team of co-authors, Tim recently published an article titled 'Tests for consciousness in humans and beyond.' In it, they review the current landscape of consciousness tests—or “C-tests”, as they call them—and outline strategies for building more and better tests down the road.
Here, Tim and I discuss what consciousness is and why theories of it seem to be proliferating. We consider several of the boundary cases that are most hotly debated right now in the field—cases like brain organoids, neonates, and split-brain patients. We sketch a few of the most prominent current consciousness tests: the command following test, the sniff test, the unlimited associative learning test, and the test for AI consciousness. We talk about how we might be able to inch our way, slowly, toward something like a thermometer for consciousness: a universal test that tells us whether an entity is conscious, or to what degree, or even what kind of conscious it is. Along the way, Tim and I talk about zombies, chatbots, brains in vats, and islands of awareness. And we muse about how, in certain respects, consciousness is like temperature, or perhaps more like happiness or wealth or intelligence, and maybe even a bit like fire.
I think you'll enjoy this one, friends—it's a thought-provoking conversation on a foundational topic, and one that takes us far and wide. So without further ado, here's my interview with Dr. Tim Bayne. Enjoy!
A transcript of this episode is available here.
Notes and links
4:45 – The philosopher Dan Dennett, who passed away in April, was known for his writings on consciousness—among them his 1991 book, Consciousness Explained.
7:00 – The classic paper on the neural correlates of consciousness, by Francis Crick and Christof Koch.
9:00 – A recent review of theories of consciousness by Anil Seth and Dr. Bayne.
10:00 – David Chalmers’ classic paper on the “hard problem” of consciousness.
13:00 – Thomas Nagel’s classic paper on what it’s like to be a bat.
20:00 – A recent paper by James Croxford and Dr. Bayne arguing against consciousness in brain organoids.
23:00 – A recent paper by Dr. Bayne and colleagues about the emergence of consciousness in infants.
27:00 – A recent paper by Dr. Bayne and colleagues about consciousness in split-brain patients. An earlier paper by Dr. Bayne on the same topic.
30:00 – A paper by Dr. Bayne, Dr. Seth, and Marcello Massimini on the notion of “islands of awareness.”
35:00 – The classic paper using the “(covert) command following test” in a patient in a so-called vegetative state.
38:00 – A 2020 paper introducing the “sniff test.”
40:00 – A recent primer on the “unlimited associative learning” test.
43:00 – An essay (preview only), by the philosopher Susan Schneider, proposing the AI consciousness test.
50:00 – The history of the scientific understanding of temperature is detailed in Hasok Chang’s book, Inventing Temperature.
53:30 – Different markers of consciousness in infants are reviewed in Dr. Bayne and colleagues’ recent paper.
1:03:00 – The ‘New York Declaration on Animal Consciousness’ was announced in April. Read about it here.
Recommendations
Being You, Anil Seth
Into the Gray Zone, Adrian Owen
Other Minds, Peter Godfrey-Smith
Many Minds is a project of the Diverse Intelligences Summer Institute, which is made possible by a generous grant from the Templeton World Charity Foundation to UCLA. It is hosted and produced by Kensy Cooperrider, with help from Assistant Producer Urte Laukaityte and with creative support from DISI Directors Erica Cartmill and Jacob Foster. Our artwork is by Ben Oldroyd. Our transcripts are created by Sarah Dopierala.
Subscribe to Many Minds on Apple, Stitcher, Spotify, Pocket Casts, Google Play, or wherever you listen to podcasts. You can also now subscribe to the Many Minds newsletter here!
We welcome your comments, questions, and suggestions. Feel free to email us at: [email protected].
For updates about the show, visit our website or follow us on Twitter: @ManyMindsPod.