Sara Walker on The Physics of Life and Planet-Scale Intelligence

What is life, and where does it come from? These are two of the deepest, most vexing, and persistent questions in science, and their enduring mystery and allure is complicated by the fact that scientists approach them from a myriad of different angles, hard to reconcile. Whatever else one might identify as universal features of all living systems, most scholars would agree life is a physical phenomenon unfolding in time. And yet current physics is notorious for its inadequacy with respect to time. Life appears to hinge on information transfer — but, again, what do we mean by “information,” and what it is relationship to energy and matter? If humankind can’t settle fundamental issues with these theoretical investigations, we might be missing other kinds of life (and mind) — not just in outer space, but here on Earth, right beneath our noses. But new models that suggest a vastly wider definition of life offer hope that we might — soon! — not only learn to recognize the biospheres and technospheres of other living worlds, but notice other “aliens” at home, and even find our place amidst a living cosmos. Welcome to COMPLEXITY, the official podcast of the Santa Fe Institute. I’m your host, Michael Garfield, and every other week we’ll bring you with us for far-ranging conversations with our worldwide network of rigorous researchers developing new frameworks to explain the deepest mysteries of the universe. This week on the show, we speak with SFI External Professor Sara Walker (Twitter, Google Scholar), Deputy Director of The Beyond Center at ASU, where she acts as Associate Professor in half a dozen different programs. In this conversation, we discuss her pioneering research in the origins of life and the profound and diverse implications of Assembly Theory — a new kind of physics she’s developing with chemist Leroy Cronin and a team of SFI and NASA scholars.  Sara likes to speculate out loud in public conversation, so strap in for an unusually enthusiastic, animated, and free-roaming conversation at the very bleeding edge of science. And be sure to check out our extensive show notes with links to all our references at complexity.simplecast.com. If you value our research and communication efforts, please subscribe, rate and review us at Apple Podcasts or Spotify, and consider making a donation — or finding other ways to engage with us — at santafe.edu/engage. Thank you for listening! Join our Facebook discussion group to meet like minds and talk about each episode. Podcast theme music by Mitch Mignano. Follow us on social media: Twitter • YouTube • Facebook • Instagram • LinkedIn Mentioned Papers: Intelligence as a planetary scale process by Adam Frank, David Grinspoon & Sara Walker The Algorithmic Origins of Life by Sara Imari Walker & Paul C. W. Davies Beyond prebiotic chemistry: What dynamic network properties allow the emergence of life? by Leroy Cronin & Sara Walker Identifying molecules as biosignatures with assembly theory and mass spectrometry by Stuart Marshall, Cole Mathis, Emma Carrick, Graham Keenan, Geoffrey Cooper, Heather Graham, Matthew Craven, Piotr Gromski, Douglas Moore, Sara Walker & Leroy Cronin Assembly Theory Explains and Quantifies the Emergence of Selection and Evolution by Abhishek Sharma, Dániel Czégel, Michael Lachmann, Christopher Kempes, Sara Walker, Leroy Cronin Quantum Non-Barking Dogs by Sara Imari Walker, Paul C. W. Davies, Prasant Samantray, Yakir Aharonov The Multiple Paths to Multiple Life by Christopher P. Kempes & David C. Krakauer  Other Related Videos & Writing: SFI Seminar - Why Black Holes Eat Information by Vijay Balasubramanian Major Transitions in Planetary Evolution by Hikaru Furukawa and Sara Imari Walker 2022 Community Lecture: “Recognizing The Alien in Us” by Sara Walker Sara Walker and Lee Cronin: The Alien Debate on The Lex Fridman Show If Cancer Were Easy, Every Cell Would Do It SFI Press Release on work by Michael Lachmann The Ministry for The Future by Kim Stanley Robinson Re: Wheeler’s delayed choice experiment Wikipedia On the SFI “Exploring Life’s Origins” Research Project Complexity Explorer’s Origins of Life Free Open Online Course Chiara Marletto on Constructor Theory Simon Saunders, Philosopher of Physics at Oxford Related SFI Podcast Episodes: Complexity 2 - The Origins of Life: David Krakauer, Sarah Maurer, and Chris Kempes at InterPlanetary Festival 2019 Complexity 8 - Olivia Judson on Major Energy Transitions in Evolutionary History Complexity 17 - Chris Kempes on The Physical Constraints on Life & Evolution Complexity 40 - The Information Theory of Biology & Origins of Life with Sara Imari Walker (Big Biology Podcast Crossover) Complexity 41 - Natalie Grefenstette on Agnostic Biosignature Detection Complexity 68 - W. Brian Arthur on Economics in Nouns & Verbs (Part 1) Complexity 80 - Mingzhen Lu on The Evolution of Root Systems & Biogeochemical Cycling Alien Crash Site 015 - Cole Mathis Alien Crash Site 019 - Heather Graham Alien Crash Site 020 - Chris Kempes Alien Crash Site 021 - Natalie Grefenstette