106 | Stuart Bartlett on What "Life" Means

Someday, most likely, we will encounter life that is not as we know it. We might find it elsewhere in the universe, we might find it right here on Earth, or we might make it ourselves in a lab. Will we know it when we see it? "Life" isn't a simple unified concept, but rather a collection of a number of life-like properties. I talk with astrobiologist Stuart Bartlett, who (in collaboration with Michael Wong) has proposed a new way of thinking about life based on four pillars: dissipation, autocatalysis, homeostasis, and learning. Their framework may or may not become the standard picture, but it provides a useful way of thinking about what we expect life to be.

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Stuart Bartlett received his Ph.D. in complex systems from the University of Southampton. He is currently a postdoctoral researcher in the Division of Geological and Planetary Sciences at Caltech, and was formerly a postdoc at the Earth Life Science Institute at the Tokyo Institute of Technology.


Episoder(418)

40 | Adrienne Mayor on Gods and Robots in Ancient Mythology

40 | Adrienne Mayor on Gods and Robots in Ancient Mythology

The modern world is full of technology, and also with anxiety about technology. We worry about robot uprisings and artificial intelligence taking over, and we contemplate what it would mean for a comp...

1 Apr 20191h 3min

39 | Malcolm MacIver on Sensing, Consciousness, and Imagination

39 | Malcolm MacIver on Sensing, Consciousness, and Imagination

Consciousness has many aspects, from experience to wakefulness to self-awareness. One aspect is imagination: our minds can conjure up multiple hypothetical futures to help us decide which choices we s...

25 Mar 20191h 19min

38 | Alan Lightman on Transcendence, Science, and a Naturalist's Sense of Meaning

38 | Alan Lightman on Transcendence, Science, and a Naturalist's Sense of Meaning

Let's say, for sake of argument, that you don't believe in God or the supernatural. Is there still a place for talking about transcendence, the sacred, and meaning in life? Some of the above, but not ...

18 Mar 20191h 16min

37 | Edward Watts on the End of the Roman Republic and Lessons for Democracy

37 | Edward Watts on the End of the Roman Republic and Lessons for Democracy

When many of us think "Ancient Rome," we think of the Empire and the Caesars. But the Empire was preceded by the Roman Republic, which flourished for a full five centuries. Why, after such a long and ...

11 Mar 20191h 31min

36 | David Albert on Quantum Measurement and the Problems with Many-Worlds

36 | David Albert on Quantum Measurement and the Problems with Many-Worlds

Quantum mechanics is our best theory of how reality works at a fundamental level, yet physicists still can't agree on what the theory actually says. At the heart of the puzzle is the "measurement prob...

4 Mar 20191h 42min

35 | Jessica Yellin on The Changing Ways We Get Our News

35 | Jessica Yellin on The Changing Ways We Get Our News

Everything we think about the world outside our immediate senses is shaped by information brought to us by other sources. In the case of what's currently happening to the human race, we call that info...

25 Feb 20191h 8min

34 | Paul Bloom on Empathy, Rationality, Morality, and Cruelty

34 | Paul Bloom on Empathy, Rationality, Morality, and Cruelty

Within every person's mind there is on ongoing battle between reason and emotion. It's not always a battle, of course; very often the two can work together. But at other times, our emotions push us to...

18 Feb 20191h 10min

33 | James Ladyman on Reality, Metaphysics, and Complexity

33 | James Ladyman on Reality, Metaphysics, and Complexity

Reality is a tricky thing. Is love real? What about the number 5? This is clearly a job for a philosopher, and James Ladyman is one of the world's acknowledged experts. He and his collaborators have b...

11 Feb 20191h 7min

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