Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas

Latest Episodes:

AMA | December 2021 Dec 15, 2021

Show notes

Welcome to the December 2021 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). I take the large number of questions asked by Patreons, whittle them down to a more manageable size — based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good — and sometimes group them together if they are about a similar topic. Note that there will be no January AMA, for purposes of a holiday break. Enjoy!

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177 | Monika Schleier-Smith on Cold Atoms and Emergent Spacetime Dec 13, 2021

Show notes

When it comes to thinking about quantum mechanics, there are levels. One level is shut-up-and-calculate: find a wave function, square it to get a probability. One level is foundational: dig deeply into the underlying ontology. But there's a level in between, long neglected but recently coming to life. In this level you think about — or do experiments with — entangled quantum systems in the real world, putting entanglement to use. Monika Schleier-Smith is an experimental physicist specializing in cold atoms, which can be both entangled and manipulated. We discuss how to use such systems to study everything from metrology to quantum gravity.

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Monika Schleier-Smith received her Ph.D. in physics from the Massachusetts Institute of Technology. She is currently an Associate Professor of Physics at Stanford University. Among her awards are a MacArthur Fellowship, a Sloan Fellowship, and the I. I. Rabi Prize in Atomic, Molecular, and Optical Physics from the American Physical Society.

176 | Joshua Greene on Morality, Psychology, and Trolley Problems Dec 06, 2021

Show notes

We all know you can't derive "ought" from "is." But it's equally clear that "is" — how the world actual works — is going to matter for "ought" — our moral choices in the world. And an important part of "is" is who we are as human beings. As products of a messy evolutionary history, we all have moral intuitions. What parts of the brain light up when we're being consequentialist, or when we're following rules? What is the relationship, if any, between those intuitions and a good moral philosophy? Joshua Greene is both a philosopher and a psychologist who studies what our intuitions are, and uses that to help illuminate what morality should be. He gives one of the best defenses of utilitarianism I've heard.

Bonus! Joshua is a co-founder of Giving Multiplier, an effective-altruism program that lets you donate to your personal favorite causes and also get matching donations to charities that have been judged to be especially effective. He was kind enough to set up a special URL for Mindscape listeners, where their donations will be matched at a higher rate of up to 100%. That lets you get matching donations when you donate to a personal favorite cause along with a charity that has been judged to be especially effective. Check out https://givingmultiplier.org/mindscape.

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Joshua Greene received his Ph.D. in philosophy from Princeton University. He is currently Professor of Psychology and a member of the Center for Brain Science faculty at Harvard University. His an originator of the dual-process model of moral reasoning. Among his awards are the the Stanton Prize from the Society for Philosophy and Psychology and Harvard's Roslyn Abramson Award for teaching. He is the author of Moral Tribes: Emotion, Reason, and the Gap Between Us and Them.

175 | William Ratcliff on Multicellularity, Physics, and Evolution Nov 29, 2021

Show notes

We've talked about the very origin of life, but certain transitions along its subsequent history were incredibly important. Perhaps none more so than the transition from unicellular to multicellular organisms, which made possible an incredible diversity of organisms and structures. Will Ratcliff studies the physics that constrains multicellular structures, examines the minute changes in certain yeast cells that allows them to become multicellular, and does long-term evolution experiments in which multicellularity spontaneously evolves and grows. We can't yet create life from non-life, but we can reproduce critical evolutionary steps in the lab.

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William Ratcliff received his Ph.D. in Ecology, Evolution, and Behavior at the University of Minnesota. He is currently Associate Professor in the School of Biological Sciences at Georgia Tech. Among his awards are a Packard Fellowship and being named in Popular Science's "Brilliant 10" of 2016.

174 | Tai-Danae Bradley on Algebra, Topology, Language, and Entropy Nov 22, 2021

Show notes

Mathematics is often thought of as the pinnacle of crisp precision: the square of the hypotenuse of a right triangle isn't "roughly" the sum of the squares of the other two sides, it's exactly that. But we live in a world of messy imprecision, and increasingly we need sophisticated techniques to quantify and deal with approximate statistical relations rather than perfect ones. Modern mathematicians have noticed, and are taking up the challenge. Tai-Danae Bradley is a mathematician who employs very high-level ideas — category theory, topology, quantum probability theory — to analyze real-world phenomena like the structure of natural-language speech. We explore a number of cool ideas and what kinds of places they are leading us to.

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Tai-Danae Bradley received her Ph.D. in mathematics from the CUNY Graduate Center. She is currently a research mathematician at Alphabet, visiting research professor of mathematics at The Master's University, and executive director of the Math3ma Institute. She hosts an explanatory mathematics blog, Math3ma. She is the co-author of the graduate-level textbook Topology: A Categorical Approach.

AMA | November 2021 Nov 17, 2021

Show notes

Welcome to the November 2021 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). I take the large number of questions asked by Patreons, whittle them down to a more manageable size — based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good — and sometimes group them together if they are about a similar topic. Enjoy!

173 | Sylvia Earle on the Oceans, the Planet, and People Nov 15, 2021

Show notes

It's a well-worn cliché that oceans cover seventy percent of the surface of Earth, but we tend to give them secondary consideration when thinking about the environment. But climate change is wreaking havoc on the oceans, not to mention pollution and overfishing — 90% of the world's marine fish stocks are fully exploited or depleted. Today's guest, Sylvia Earle, is a well-known ocean scientist, a celebrated underwater explorer, and a tireless advocate for the world's oceans. We talk about the current state of our oceans, what we know and have yet to learn about them, and what we can do individually and collectively to make things better.

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Sylvia Earle received her Ph.D. in phycology from Duke University. She is currently National Geographic's Rosemary and Roger Enrico Chair for Ocean Exploration, as well as founder of Mission Blue, SEAlliance and Deep Ocean Exploration and Research. She formerly served as Chief Scientist for the National Oceanic and Atmospheric Administration. Among her awards are the TED Prize, the National Women's Hall of Fame, and the inaugural Lifetime Achievement Award from the Seattle Aquarium. She is the author of several books, the most recent of which is National Geographic Ocean: A Global Odyssey.

172 | David Goyer on Televising the Fall of the Galactic Empire Nov 08, 2021

Show notes

Science and storytelling have a long and tumultuous relationship. Scientists sometimes want stories to be just an advertisement for how awesome science is; storytellers sometimes want to use science for a few cheap thrills before abandoning it in the morning. But science is about ideas, and ideas can make for thrilling stories when done well. David Goyer is an accomplished screenwriter and director who has taken up a daunting task: adapting Isaac Asimov's famous Foundation series for TV. (Available on Apple TV now.) We talk about the challenge of making a television version of a beloved series whose central character is a mathematician, and how science and storytelling relate to each other more generally.

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David Goyer graduated from the University of Southern California's School of Cinematic Arts. He has written stories or screenplays for a number of well-known films, including Dark City, Blade, the Dark Knight trilogy, Man of Steel, and Batman v Superman, as well as TV series such as FlashForward and Constantine. He has also directed and produced numerous films and shows. He has written novels, comic books, and video games such as Call of Duty: Black Ops. In addition to Foundation, he is currently working on a TV adaptation of Neil Gaiman's Sandman graphic novels. Episodes of Foundation are released every Friday; the finale of the first season will be available Nov. 19.

171 | Christopher Mims on Our Interconnected Industrial Ecology Nov 01, 2021

Show notes

As the holidays approach, we are being reminded of the fragility of the global supply chain. But at the same time, the supply chain itself is a truly impressive and fascinating structure, made as it is from multiple components that must work together in synchrony. From building an item in a factory and shipping it worldwide to transporting it locally, processing it in a distribution center, and finally delivering it to an address, the system is simultaneously awe-inspiring and deeply dehumanizing. I talk with Christopher Mims about how things are made, how they get to us, and what it all means for the present and future of our work and our lives.

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Christopher Mims received a bachelor's degree in neuroscience and behavioral biology from Emory University. He is currently a technology columnist at The Wall Street Journal. He has previously written for publications such as Wired, Scientific American, The Atlantic, and Smithsonian. His new book is Arriving Today: From Factory to Front Door — Why Everything Has Changed About How and What We Buy.

170 | Priya Natarajan on Galaxies, Black Holes, and Cosmic Anomalies Oct 25, 2021

Show notes

There is so much we don't know about our universe. But our curiosity about the unknown shouldn't blind us to the incredible progress we have made in cosmology over the last century. We know the universe is big, expanding, and accelerating. Modern cosmologists are using unprecedentedly precise datasets to uncover more details about the evolution and structure of galaxies and the distribution and nature of dark matter. Priya Natarajan is a cosmologist working at the interface of data, theory, and simulation. We talk about the state of modern cosmology, and how tools like gravitational lensing are providing us with detailed views of what's happening in the distant universe.

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Priya Natarajan received her Ph.D. in astrophysics from the University of Cambridge. She is currently professor of astronomy at Yale University, the Sophie and Tycho Brahe Professor at the Niels Bohr Institute of the University of Copenhagen, and an honorary professor for life at the University of Delhi, India. She is an Affiliate at the Black Hole Initiative at Harvard University and an Associate Member of the Center for Computational Astrophysics at the Flatiron Institute in New York. She is a frequent contributor to the New York Review of Books and other publications. Among her awards are a Guggenheim Fellowship, the India Abroad Foundation's "Face of the Future" Award, and an India Empire NRI award for Achievement in the Sciences. She is the author of Mapping the Heavens: The Radical Scientific Ideas That Reveal the Cosmos.

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