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The Shape of the World

The Shape of the World

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A Podcast About Cities, Nature and People Ciencia Ciencias Biológicas Ciencias Sociales Historia Natural Naturaleza y Ecología
Episodios
  • The Warm Glow of Helping (Update)

    The Warm Glow of Helping (Update)
    Dec 18 2025
    On the occasions when we humans go out of our way to help another person who is in distress, we are acting out our biological inheritance. And if we don’t help someone in trouble, that’s because we’ve had to actually actively suppress what is natural for us to do. That was the finding of the neurologist Peggy Mason. whom we interviewed in Shape of the World’s second season. We’ve re-released that episode because that particular finding of Peggy’s and the others she spoke about remain incredibly relevant and still come across as a bit shocking. As a child, Peggy Mason was a biology prodigy. By the age of nine, she was assisting the zoologist Dr. Charles Handley in teaching taxidermy at the Smithsonian. Today, as a neurobiologist, Peggy still works with mammals, but now she’s studying whether they experience empathy and act to help one another. Peggy was studying the subject of pain modulation until a post-doctoral student at the University of Chicago, Inbal Ben-Ami Bartal, asked if she’d be interested in expanding her work to collaborate on a project about empathy. “I went over to see her that same day,” says Peggy, and the upshot was the discovery that, like humans, rats have an aversion to witnessing the distress of others and a strong motivation to help someone else who’s suffering. In addition to leading the research laboratory at the University of Chicago, Peggy is a committed teacher of neurobiology, teaching both formally (at the University) and informally, through her blog and a popular free, online course. “It’s our biological mammalian inheritance to help. It’s not helping that’s the weird thing.” – Dr. Peggy Mason is a professor of neurobiology at the University of Chicago. Want to Learn More, See More, Know More? You’ll love this video from Nova that shows one rat deliberately setting free another rat that’s trapped. Later, the rat is confronted with the question of which to do first: save some rat it had never even met before, or wolf down the chocolate Peggy offered? Also, here’s the article in Science magazine. How can I take a class with Peggy? On Coursera, take “Understanding the Brain: The Neurobiology of Every Day Life,” a free course taught by Peggy. You can also gain more insights from Peggy by subscribing to her blog, which is fascinating and far-reaching in its subject matter. Her most recent post has the full script of her “Aims of Education” address, a prestigious speech given to incoming students. Rats from Dr. Mason and Dr. Bartal’s trapped-rat empathy experiment. Amazingly, the black-and-white rat will venture into the “danger zone” of the arena to help the trapped rat. Photograph of Dr. Mason and Dr. Bartal together. Rat-nibbled Hershey’s kisses. Electrophysiological recordings of a rat, illustrating how different parts of a rat’s body (the right forepaw, the left hindpaw, etc.) respond to certain stimuli.
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    30 m
  • How Thinking Like a Geologist Can Change the World (Update)

    How Thinking Like a Geologist Can Change the World (Update)
    Nov 20 2025

    In 2020, we sat down with structural geologist Marcia Bjornerud on the Shape of the World for a conversation that reshaped how we think about time. We decided to revisit and re-release that episode. Marcia has continued to research and to write, and she has a new book out that we love; it’s called Turning to Stone: Discovering the Subtle Wisdom of Rocks.

    Marcia Bjornerud has published many professional papers (read mainly by expert academics in her field) and wrote two popular books that, in the opinion of this podcast, ought to be read by every inhabitant of our planet: Reading the Rocks (2005) and Timefulness: How Thinking Like a Geologist Can Change the World (2018). The first was an awe-inspiring, sometimes amusing and always relatable way of understanding the Earth itself. The second showed us a way to live on the Earth that respects how remarkable this planet is.

    Acquiring a better grasp of our planet’s long history is what Marcia describes as “timefulness.” The concept of timefulness pushes back against the narrow perspectives and super-short time frames in which our modern societies generally operate. We each tend to think of our everyday life as singular, without precedent. Yet our lives are built upon a series of processes set in motion billions of years ago–and it’s entirely possible that life on Earth may roll comfortably on for another billion.

    “Thinking like a geologist is about expanding our time frame, not seeing ourselves as the center of the cosmos, learning patience, understanding what lasts and what doesn’t.”

    – Dr. Marcia Bjornerud is Professor of Geosciences and Environmental Studies at Lawrence University in Appleton, Wisconsin. She conducts structural geology field research in Norway, New Zealand, arctic Canada, Italy and the Lake Superior region.

    How to Find Out More

    Read Marcia’s books. Order them from your favorite local bookstore. Her first two books, Timefulness: How Thinking Like a Geologist Can Help Save the World (2018) and Geopedia: A Brief Compendium of Geologic Curiosities (2022) were published through Princeton University Press and can be found here. Her most recent book, Turning to Stone: Discovering the Subtle Wisdom of Rocks, was published by Flatiron Books in 2024 and can be found here.

    You can also find some of Marcia’s talks on YouTube.

    In the podcast, Marcia talks about the Surtsey volcano. This could be the exact same film Marcia describes having seen in grammar school.

    • Marcia Bjornerud in front of what she calls her dream house in the Italian Apennines, not far from the famed Carrara Marble quarries. In fall of 2016, she taught a semester-long field course in the Marche region and returned to the United States around the time of the 2016 Presidential election. That election and its outcome was a major catalyst for her to write the book “Timefulness.”
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    34 m
  • Is the Earth Alive?

    Is the Earth Alive?
    Aug 21 2025
    Ferris Jabr Ferris Jabr, author of Becoming Earth, claims that it is alive: that Earth is a vast interconnected living system and we humans (and all other living things) don’t just live on the earth– we are the Earth. We’re an outgrowth of its structure and an engine of its evolution. In this episode, Ferris (a contributor to the New York Times and a bestselling author) explains how we and our environment have coevolved for billions of years, transforming a lump of orbiting rock into a cosmic oasis—a planet that breathes, metabolizes, and regulates climate–and how the Earth isn’t merely a stage where life plays out, but is an actual swirling, bubbling body that’s alive in its own right. There’s no universally agreed-upon definition of “aliveness” in science. But in his new book, Becoming Earth, Ferris argues that this planet meets the mark. He points to the self-regulating chemistry of the atmosphere, to the vast networks of microscopic plankton that alter global climate, and to something as ordinary (and astonishing) as soil, which can turn dead matter into living things. We’ll dig into the ancient myths, the modern science, and the stories that shape the question of Earth’s aliveness. What happens when we stop thinking of the Earth as a rock with stuff growing on it, and start seeing it as a living system — a responsive, complex whole with its own kind of agency? And if the planet really is alive (or at least behaves in a way that’s uncanny to our living peers), how might that change the way we think about it and how we behave? “Life is a planetary phenomenon. It’s not that Earth had life evolve on it, but rather that Earth came to life itself. It is a garden that made itself. It sewed itself. It nurtured itself. It waters itself. And we are all part of that large, living architecture.” – Ferris Jabr, author of Becoming Earth and contributing writer for the New York Times Learn More About Ferris’s Work Ferris’s debut book, Becoming Earth (Penguin Random House, 2025), was a New York Times bestseller and has been selected as a “Best Book of the Year” choice by seven major sellers. You can ask your local independent bookstores to order it for you, take it out of the library, or purchase it here or anywhere linked on this page. Ferris is a contributing writer to over a dozen major publications, including The New York Times, National Geographic, The Atlantic, and The New Yorker. You can find links to his articles on his website here. For more of his writing about ideas from this episode, we recommend reading his piece “The Earth is Just As Alive As You Are” for The New York Times. Other articles by Ferris that particularly piqued our interest include “The Story of Storytelling” and “The Social Life of Forest” Sources of Inspiration Mentioned in the Episode Ferris mentioned the Gaia Hypothesis, the name given to the idea that life on Earth not only emerged but also actively shaped and sustained its environment to support life itself. The theory originated in the 1960s, when James Lovelock, a British atmospheric chemist and inventor, first proposed the concept. At the time, Lovelock was consulting with NASA on a project to detect signs of life on Mars, which required identifying chemical signatures that might indicate a living planet, such as atmospheric composition. He observed that Earth’s atmosphere was far from chemical equilibrium (e.g., with gases like oxygen and methane coexisting), which led him to propose that life plays an active role in regulating planetary conditions. Evolutionary theorist and microbiologist Lynn Margulis later collaborated with Lovelock, helping to develop and support the Gaia Hypothesis with evidence from microbial evolution and Earth’s early biosphere. Watch this video of her presenting it to NASA. At first, many scientists initially rejected or even ridiculed the Gaia Hypothesis; it was viewed by as seeming too anthropomorphic, or unscientific, or simply too mystical-sounding. But as Ferris notes in this episode, today scientists widely acknowledge that life and environment have coevolved, and that feedback loops do exist between biological and geophysical systems. The underlying idea has become much more mainstream. The new scientific field that emerged from this work, and which Ferris mentioned in the episode, is called zoogeochemistry. Here is one article that further describes that field. It’s also worth noting that well before modern Western science began to evolve, worldviews of indigenous people in various parts of the world expressed some similar concepts of the earth as being alive through myths, rituals, and stories. Ferris mentioned one of his favorite authors, Virginia Woolf, who sometimes wrote quite directly about the connectivity of life. Here’s one passage from The Waves (1931), in which one of the central characters, Bernard, speaks to that idea:...
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    21 m
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