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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

In some sense, it says there's no interior to the black hole, nothing ever crosses. So I gave you this very nice story that there's no drama. Sometimes that's how it's described at the event horizon and you fall through and there's nothing there. This other idea says, well, hold on a second.

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

In some sense, it says there's no interior to the black hole, nothing ever crosses. So I gave you this very nice story that there's no drama. Sometimes that's how it's described at the event horizon and you fall through and there's nothing there. This other idea says, well, hold on a second.

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

If it's really strings, as I get close to this magnifying quality and the slowing time down near the event horizon, it is as though I put a magnifying glass on things and now the strings aren't so microscopic. They kind of smear around and then they get caught like a tangle around the event horizon and they just actually never fall through. I don't think that either, but it was interesting.

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

If it's really strings, as I get close to this magnifying quality and the slowing time down near the event horizon, it is as though I put a magnifying glass on things and now the strings aren't so microscopic. They kind of smear around and then they get caught like a tangle around the event horizon and they just actually never fall through. I don't think that either, but it was interesting.

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

If it's really strings, as I get close to this magnifying quality and the slowing time down near the event horizon, it is as though I put a magnifying glass on things and now the strings aren't so microscopic. They kind of smear around and then they get caught like a tangle around the event horizon and they just actually never fall through. I don't think that either, but it was interesting.

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

There are no teeny tiny marbles to fall through.

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

There are no teeny tiny marbles to fall through.

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

There are no teeny tiny marbles to fall through.

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

Nothing falls in. So the information gets out because it never went in in the first place.

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

Nothing falls in. So the information gets out because it never went in in the first place.

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

Nothing falls in. So the information gets out because it never went in in the first place.

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

There's a strong statement there, yeah.

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

There's a strong statement there, yeah.

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

There's a strong statement there, yeah.

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

Worth trying, but I also don't think that that's the case. So the no hair theorems are formal proofs that the black hole is this featureless perfect fundamental particle that we talked about, that all you can ever tell about the black hole is its electrical charge, its mass, and its spin, and that it cannot possess other features. It has no hair, is one way of describing it.

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

Worth trying, but I also don't think that that's the case. So the no hair theorems are formal proofs that the black hole is this featureless perfect fundamental particle that we talked about, that all you can ever tell about the black hole is its electrical charge, its mass, and its spin, and that it cannot possess other features. It has no hair, is one way of describing it.

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

Worth trying, but I also don't think that that's the case. So the no hair theorems are formal proofs that the black hole is this featureless perfect fundamental particle that we talked about, that all you can ever tell about the black hole is its electrical charge, its mass, and its spin, and that it cannot possess other features. It has no hair, is one way of describing it.

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

And those are proven mathematical proofs in the context of general relativity. So the idea is, well, therefore I can know nothing about what goes into the black hole, so the information is lost. But if they could have hair, I could say that's my black hole, because it'd have features that I could distinguish, and it could encode the information that went in in this way.

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

And those are proven mathematical proofs in the context of general relativity. So the idea is, well, therefore I can know nothing about what goes into the black hole, so the information is lost. But if they could have hair, I could say that's my black hole, because it'd have features that I could distinguish, and it could encode the information that went in in this way.

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

And those are proven mathematical proofs in the context of general relativity. So the idea is, well, therefore I can know nothing about what goes into the black hole, so the information is lost. But if they could have hair, I could say that's my black hole, because it'd have features that I could distinguish, and it could encode the information that went in in this way.