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David Kipping

๐Ÿ‘ค Speaker
See mentions of this person in podcasts
3715 total appearances

Appearances Over Time

Podcast Appearances

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

Hmm.

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

nearby stars and found no convincing examples of what looked like a Dyson sphere star.

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

And then Jason Wright and his team extended this, I think using WISE, which is another infrared satellite, to look around galaxies.

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

So could an entire galaxy have been converted into Dyson spheres?

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

or a significant fraction of the galaxy, which is basically the Kardashev type three, right?

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

This is when you've basically mastered the entire galactic pool of resources.

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

And again, out of a hundred thousand nearby galaxies, there appears to be no compelling examples of what looks like a Dyson galaxy, if you wanna call it that.

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

So that by no means proves that they don't exist or don't happen, but it seems like it's an unusual behavior

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

for a civilization to get to that stage of development and start harvesting the entire stellar output.

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

Unusually, yes.

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

Yeah.

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

I mean, it's a whole new window to the universe, not just in terms of astrophysics, but potentially for technosciences as well.

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

I have to say with the warp drives, I am skeptical that warp drives are possible because you have a fundamental problem with relativity.

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

You can either really have relativity, faster-than-light travel, or causality.

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

You can only choose two of those three things.

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

You really can't have all three in a coherent universe.

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

If you have all three, you basically end up with the possibility of these kind of temporal paradoxes and time loops and grandfather paradoxes.

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

Well, can't there be pockets of causality, something like that?

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

Like where there's like pockets of consistent causality?

Lex Fridman Podcast
#355 โ€“ David Kipping: Alien Civilizations and Habitable Worlds

You could design it in that way.