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Janna Levin

👤 Person
1392 total appearances

Appearances Over Time

Podcast Appearances

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

A whole kind of variety of possibilities to be explored by nature in the same way that we're describing. And I think you're absolutely right. When life was kicked off, first sparked here on Earth, it was voracious. Now, it took a really long time, though, to get to multicellularity. I think that's interesting.

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

A whole kind of variety of possibilities to be explored by nature in the same way that we're describing. And I think you're absolutely right. When life was kicked off, first sparked here on Earth, it was voracious. Now, it took a really long time, though, to get to multicellularity. I think that's interesting.

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

It's weird. It took a really, really long time to become multicellular. But it did not take long just to start.

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

It's weird. It took a really, really long time to become multicellular. But it did not take long just to start.

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

It's weird. It took a really, really long time to become multicellular. But it did not take long just to start.

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

I would say multicellularity, which is strictly an energy problem, I think. Again, it's just like, can electrons flow the right way? And is it energetically favorable for multicellularity to exist? Because if it's energetically expensive, it's not going to succeed. And if it's energetically favorable, it's going to take off.

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

I would say multicellularity, which is strictly an energy problem, I think. Again, it's just like, can electrons flow the right way? And is it energetically favorable for multicellularity to exist? Because if it's energetically expensive, it's not going to succeed. And if it's energetically favorable, it's going to take off.

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

I would say multicellularity, which is strictly an energy problem, I think. Again, it's just like, can electrons flow the right way? And is it energetically favorable for multicellularity to exist? Because if it's energetically expensive, it's not going to succeed. And if it's energetically favorable, it's going to take off.

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

It's really just... And that's why I also think that going from inanimate to animate is probably gray, right? Like the transition is gray. At what point we call something fully alive? Famously, it's hard to make a nice list of bullet points that need to be met in order to declare something alive. Is a virus alive? I mean, I don't know. Is a prion alive?

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

It's really just... And that's why I also think that going from inanimate to animate is probably gray, right? Like the transition is gray. At what point we call something fully alive? Famously, it's hard to make a nice list of bullet points that need to be met in order to declare something alive. Is a virus alive? I mean, I don't know. Is a prion alive?

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

It's really just... And that's why I also think that going from inanimate to animate is probably gray, right? Like the transition is gray. At what point we call something fully alive? Famously, it's hard to make a nice list of bullet points that need to be met in order to declare something alive. Is a virus alive? I mean, I don't know. Is a prion alive?

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

They seem to do some things, but they kind of rely on stealing other DNA and replicating and I don't know. I guess they're not alive. But I mean, the point is, is that it really, at the end of the day, I really think it's just, you asked if it's just physics. I mean, I think it's just this, these rules of energetics.

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

They seem to do some things, but they kind of rely on stealing other DNA and replicating and I don't know. I guess they're not alive. But I mean, the point is, is that it really, at the end of the day, I really think it's just, you asked if it's just physics. I mean, I think it's just this, these rules of energetics.

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

They seem to do some things, but they kind of rely on stealing other DNA and replicating and I don't know. I guess they're not alive. But I mean, the point is, is that it really, at the end of the day, I really think it's just, you asked if it's just physics. I mean, I think it's just this, these rules of energetics.

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

Carbon is really cool and really useful because it finds a lot. It's nice. It finds a lot of ways to combine with other things. And that's complexity. And complexity is the kind of thing you need for life. You can't have a very simple linear chain and expect to get life. But I don't know. Maybe sulfur would do okay.

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

Carbon is really cool and really useful because it finds a lot. It's nice. It finds a lot of ways to combine with other things. And that's complexity. And complexity is the kind of thing you need for life. You can't have a very simple linear chain and expect to get life. But I don't know. Maybe sulfur would do okay.

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

Carbon is really cool and really useful because it finds a lot. It's nice. It finds a lot of ways to combine with other things. And that's complexity. And complexity is the kind of thing you need for life. You can't have a very simple linear chain and expect to get life. But I don't know. Maybe sulfur would do okay.

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

I think wormholes are a perfectly valid construction to consider. They're just a curve in space-time. Topologically, which has to do with the connectedness of the space, is a little tricky because we know that Einstein's description is completely in terms of local curves and distortions, expansion, contraction, but it doesn't say anything about the global connectedness of the space.

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

I think wormholes are a perfectly valid construction to consider. They're just a curve in space-time. Topologically, which has to do with the connectedness of the space, is a little tricky because we know that Einstein's description is completely in terms of local curves and distortions, expansion, contraction, but it doesn't say anything about the global connectedness of the space.

Lex Fridman Podcast
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

I think wormholes are a perfectly valid construction to consider. They're just a curve in space-time. Topologically, which has to do with the connectedness of the space, is a little tricky because we know that Einstein's description is completely in terms of local curves and distortions, expansion, contraction, but it doesn't say anything about the global connectedness of the space.