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(423)

14 | Alta Charo on Bioethics and the Law

14 | Alta Charo on Bioethics and the Law

To paraphrase Ian Malcolm in Jurassic Park, scientists tend to focus on whether they can do something, not whether they should. Questions of what we should do tend to wander away from the pristine bea...

8 Sep 20181h 8min

13 | Neha Narula on Blockchain, Cryptocurrency, and the Future of the Internet

13 | Neha Narula on Blockchain, Cryptocurrency, and the Future of the Internet

For something of such obvious importance, money is kind of mysterious. It can, as Homer Simpson once memorably noted, be exchanged for goods and services. But who decides exactly how many goods/servic...

8 Sep 20181h 6min

12 | Wynton Marsalis on Jazz, Time, and America

12 | Wynton Marsalis on Jazz, Time, and America

Jazz occupies a special place in the American cultural landscape. It's played in elegant concert halls and run-down bars, and can feature esoteric harmonic experimentation or good old-fashioned foot-s...

4 Sep 20181h 1min

11 | Mike Brown on Killing Pluto and Replacing It with Planet 9

11 | Mike Brown on Killing Pluto and Replacing It with Planet 9

Few events in recent astronomical history have had the worldwide emotional resonance as the 2006 announcement that Pluto was no longer considered a planet, at least as far as the International Astrono...

27 Aug 20181h 17min

10 | Megan Rosenbloom on the Death Positive Movement

10 | Megan Rosenbloom on the Death Positive Movement

We're all going to die. But while we are alive, it's up to us how we understand and deal with that fact. In the United States especially, there is a tendency to not face up to the reality of death, an...

20 Aug 20181h 9min

9 | Solo -- Why Is There Something Rather than Nothing?

9 | Solo -- Why Is There Something Rather than Nothing?

It's fun to be in the exciting, chaotic, youthful days of the podcast, when anything goes and experimentation is the order of the day. So today's show is something different: a solo effort, featuring ...

13 Aug 20181h 21min

8 | Carl Zimmer on Heredity, DNA, and Editing Genes

8 | Carl Zimmer on Heredity, DNA, and Editing Genes

Our understanding of heredity and genetics is improving at blinding speed. It was only in the year 2000 that scientists obtained the first rough map of the human genome: 3 billion base pairs of DNA wi...

6 Aug 20181h 31min

7 | Yascha Mounk on Threats to Liberal Democracy

7 | Yascha Mounk on Threats to Liberal Democracy

Both words in the phrase "liberal democracy" carry meaning, and both concepts are under attack around the world. "Democracy" means that they people rule, while "liberal" (in this sense) means that the...

30 Jul 20181h 5min

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