79 | Sara Imari Walker on Information and the Origin of Life

79 | Sara Imari Walker on Information and the Origin of Life

We are all alive, but "life" is something we struggle to understand. How do we distinguish a "living organism" from an emergent dynamical system like a hurricane, or a resource-consuming chemical reaction like a forest fire, or an information-processing system like a laptop computer? There is probably no one crisp set of criteria that delineates life from non-life, but it's worth the exercise to think about what we really mean, especially as the quest to find life outside the confines of the Earth picks up steam. Sara Imari Walker planned to become a cosmologist before shifting her focus to astrobiology, and is now a leading researcher on the origin and nature of life. We talk about what life is and how to find it, with a special focus on the role played by information and computation in living beings.

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Sara Imari Walker received her Ph.D. in physics from Dartmouth college. She is currently Associate Professor in the School of Earth and Space Exploration at Arizona State University, Deputy Director of the Beyond Center for Fundamental Concepts in Science, and Associate Director of the ASU-Santa Fe Institute Center for Biosocial Complex Systems. She is the co-founder of the astrobiology social network SAGANet, and serves on the Board of Directors for Blue Marble Space.


Episoder(418)

329 | Steven Pinker on Rationality and Common Knowledge

329 | Steven Pinker on Rationality and Common Knowledge

Getting along in society requires that we mostly adhere to certainly shared norms and customs. Often it's not enough that we all know what the rules are, but also that everyone else knows the rules, a...

22 Sep 20251h 16min

328 | Mary Roach on Replacing Parts of Our Bodies

328 | Mary Roach on Replacing Parts of Our Bodies

Like any machine, bodies occasionally break down, and it's natural to go in search of a replacement part. Ancient societies featured simple prosthetics for teeth, noses, and limbs, while modern medici...

15 Sep 20251h 7min

AMA | September 2025

AMA | September 2025

Welcome to the September 2025 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). We take questions asked by P...

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327 | Cass Sunstein on Liberalism

327 | Cass Sunstein on Liberalism

"Liberalism," divorced from its particular connotations in this or that modern political context, refers broadly to a philosophy of individual rights, liberties, and responsibilities, coupled with res...

1 Sep 20251h 10min

326 | Natalie Batalha on What We Know and Will Learn About Exoplanets

326 | Natalie Batalha on What We Know and Will Learn About Exoplanets

In a relatively short period of time, exoplanets (planets around stars other than our Sun) have gone from an intriguing conjecture to an active field of scientific study, with over 5,000 confirmed dis...

25 Aug 20251h 12min

325 | Alvy Ray Smith on Pixar, Pixels, and the Great Digital Convergence

325 | Alvy Ray Smith on Pixar, Pixels, and the Great Digital Convergence

The world is becoming pixelated. As computers and other digital devices become ubiquitous, human knowledge and communication and information is gradually being converted into, and manipulated as, stri...

18 Aug 20251h 26min

324 | Elizabeth Mynatt on Universities and the Importance of Basic Research

324 | Elizabeth Mynatt on Universities and the Importance of Basic Research

It is not manifestly obvious that universities should be where most scholarly research is performed. One could imagine systems that separated out the tasks of "teaching students" and "generating new k...

11 Aug 20251h 13min

AMA | August 2025

AMA | August 2025

Welcome to the August 2025 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). We take questions asked by Patr...

4 Aug 20253h 39min

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