A paradox of learning
Many Minds
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 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, is if by magic, come away with a new understanding of the world. But...
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From the archive: The octopus and the android
Many Minds
Happy holidays, friends! We will be back with a new episode in January 2025. In the meantime, enjoy this favorite from our archives! ----- [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...
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Your brain on language
Many Minds
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...
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Nestcraft
Many Minds
How do birds build their nests? By instinct, of course—at least that's what the conventional wisdom tells us. A swallow builds a swallow's nest; a robin builds a robin's nest. Every bird just follows the rigid template set down in its genes. But over the course of the last couple of decades, scientists have begun to take a closer look at nests—they've weighed and measured them, they've filmed the building process. And the conventional wisdom just doesn't hold up. These structures vary in all kinds of ways, even within a species. They're shaped by experience, by learning, by cultural...
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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...
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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...
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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...
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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 ....
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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...
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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_outlineHow do birds build their nests? By instinct, of course—at least that's what the conventional wisdom tells us. A swallow builds a swallow's nest; a robin builds a robin's nest. Every bird just follows the rigid template set down in its genes. But over the course of the last couple of decades, scientists have begun to take a closer look at nests—they've weighed and measured them, they've filmed the building process. And the conventional wisdom just doesn't hold up. These structures vary in all kinds of ways, even within a species. They're shaped by experience, by learning, by cultural tradition. When we look at a bird's nest, we're looking at the product of a flexible mind.
My guest today is Dr. Susan Healy. Sue is a Professor in the School of Biology at the University of St Andrews and an expert in birds—their behavior, their cognition, and their evolution. For more than a decade now, Sue has been pioneering a new chapter in the study of birds' nests.
Here, Sue and I talk about some of the most impressive nests (as well as some of the least impressive). We do a bit of Birds' Nests 101—the different forms they take, the functions they serve, which sex does the building, how these structures evolved, and more. We dig into the mounting evidence that birds are in fact quite flexible in their building practices, that they learn from others and from their own experience. We discuss recent evidence from Sue's team that cultural traditions shape the weaver nests of the Kalahari. And we talk about what nests might have in common with songs and tools. Along the way, we touch on: pigeon nests and hummingbird nests, dinosaur nests and chimpanzee nests; Alfred Russel Wallace; commonalities in the techniques of human weavers and weaver birds; whether bird personality might be reflected in nest style; the brain basis of nest-building; and a whole lot else.
Hope you enjoy this one, friends. On to my conversation with Dr. Sue Healy.
A transcript of this episode is availalble here.
Notes and links
2:30 – An example of a post on the (seemingly inadequate) nests of pigeons.
7:30 – An article featuring a variety of weaverbird nests.
10:30 – Alfred Russel Wallace’s essay on birds' nests is available here.
15:00 – A paper from another branch of Dr. Healy’s work, on hummingbirds.
16:00 – The 1902 book by Charles Dixon on the science of “caliology.”
17:00 – An example of research done by the Colliases on weavers.
19:00 – For an up-to-date primer on birds’ nests—covering a number of the questions we discuss here—see Dr. Healy’s recent primer.
22:30 – An article about hummingbird eggs.
28:30 – A paper by Dr. Healy and colleagues on the use of human materials in birds’ nests. Our episode on animal medication is here.
31:30 – An article about bowerbirds and how they decorate their bowers.
35:00 – An article on the evolution of birds’ nests, covering the question of what dinosaur nests were like.
43:00 – A paper by Dr. Healy and colleagues on the impact of temperature and earlier breeding success on nest size.
51:00 – For more discussion of personality in animals, including in clonal fish, see our episode with Kate Laskowski.
55:00 – A study by Dr. Healy and colleagues showing that zebra finches build nests that match the color of the walls.
58:00 – A study by Dr. Healy and colleagues looking at how zebra finches learn aspects of nest-building from familiar individuals.
59:00 – A study by Dr. Healy and colleagues, led by Maria Tello-Ramos, about architectural traditions in an African sociable weaver species.
1:07:00 – An article by Michael Arbib, Dr. Healy, and colleagues on connections between tool use, language, and nest-building.
1:11:00 – An initial study on the brain basis of nest-building in zebra finches. A further study on the same topic.
1:12:30 – A paper by Hopi E. Hoekstra and colleagues on the genetics of burrow-building in deer mice.
1:14:00 – An exploration of the idea that humans initially learned their weaving skills from weaver birds.
Recommendations
Books by Mike Hansell (see here, here, and here)
Birds’ nests, Charles Dixon
Avian architecture, Peter Goodfellow
Animal architects, James Gould & Carol Gould
Many Minds is a project of the Diverse Intelligences Summer Institute, which is made possible by a generous grant from the John Templeton Foundation to Indiana University. The show 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.
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