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.


Jaksot(424)

352 | Bing Brunton on Connecting the Connectome to the Body

352 | Bing Brunton on Connecting the Connectome to the Body

The connectome is the wiring diagram of a brain, a big matrix that tells us what neurons talk to what other neurons. Understanding it is an important step to understanding how brains work, but a long ...

27 Huhti 1h 14min

351 | Peter Singer on Maximizing Good for All Sentient Creatures

351 | Peter Singer on Maximizing Good for All Sentient Creatures

Peter Singer has been an influential philosopher for a number of decades. He was a significant early voice in animal rights, has been a leading thinker of utilitarianism, and helped inspire the effect...

20 Huhti 1h 15min

350 | J. Eric Oliver on the Self and How to Know It

350 | J. Eric Oliver on the Self and How to Know It

We are more familiar with ourselves than with anything else in the universe, but we generally don't come very close to really understanding what our "self" is. That's not too surprising, as selves are...

13 Huhti 1h 21min

AMA | April 2026

AMA | April 2026

Welcome to the April 2026 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 Patre...

5 Huhti 3h 46min

349 | Daniel Harlow on What Quantum Gravity Teaches Us About Quantum Mechanics

349 | Daniel Harlow on What Quantum Gravity Teaches Us About Quantum Mechanics

There is something special about gravity. After decades of effort, there is still no convergence on the right way to reconcile Einstein's theory of general relativity with the framework of quantum mec...

30 Maalis 1h 25min

348 | Jessica Riskin on Jean-Baptiste Lamarck and Life as Creative Agency

348 | Jessica Riskin on Jean-Baptiste Lamarck and Life as Creative Agency

"Lamarkism" is a term often attached to a seemingly discredited idea in evolutionary biology: that one organism could acquire characteristics (e.g., becoming stronger through exercise) that would then...

23 Maalis 1h 15min

347 | Andrew Guthrie Ferguson on How Your Data Will Be Used Against You

347 | Andrew Guthrie Ferguson on How Your Data Will Be Used Against You

In the 18th century, philosopher Jeremy Bentham suggested the Panopticon as a model of a prison where inmates could be constantly observed by just a single prison guard. Although his original idea was...

16 Maalis 1h 8min

346 | Erica Cartmill on How Human and Animal Minds Think and Play

346 | Erica Cartmill on How Human and Animal Minds Think and Play

Intelligence is a many splendored thing, especially when it comes to comparisons between species. Chimpanzees are better than humans at some numerical tasks, but less good at understanding what number...

9 Maalis 1h 28min

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