The (Multi) Universe(s)

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Robert and Brian Greene discuss what's beyond the horizon of our universe, what you might wear in infinite universes with finite pairs of designer shoes, and why the Universe and swiss cheese have more in common than you think.
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3D Lab is supported by AT&T. We all love to connect via video calls or texts. Right now, at AT&T, you can get the new iPhone 18 Pro for $0 with iPhone trading. Any condition. It has the ultimate pro camera system and big leap in battery life so you can turn this deal into a long lasting connection. Learn how you can trade in your iPhone for the new iPhone 18 Pro requires trading of iPhone 14 or higher, excluding iPhone 16E, an eligible plan. Terms and restrictions apply, subject to change, visit an AT&T store for details. Hello, I'm Jad Abumrod. And I'm Robert Crowe. And this is Radio Lab, the podcast. Which means it's not Radio Lab, the beautiful show that we do. No, this is a shorty. In this podcast, we're going to take you to New York City, to the 92nd Street Y, where I do a series called Giants of Science. And on one night, something very cool happened. Is any of these things? I thought you were. I thought I saw you there in Row 3. I can't remember. I can't remember. Anyhow, tell him. I'll shut up. The guest is... Well, I don't have to. Let's just go to the hall, and Robert, on tape, we'll take over from here. The man you are about to meet is he's a professor at Columbia University of Mathematics. He's also a professor of physics at Columbia University. He's also the director of the Institute for Strings, Cosmology, and Astroparticle physics at Columbia University. He's also a best-selling author. He's also done work on what's called mirror asymmetry, which means I'm not sure what exactly. It involves, however, relating two different collabiao manifolds, relating the conifold to one of the arbifolders, which I'm sure you know all about. He's a Rhodes scholar. He's the author of the elegant universe. Basically, he's not a dumb person, not at all, but he does, however, believe the most peculiar things. So, if you ask him, and I will, he believes that if you travel from this point of view, this room, from this auditorium on 92nd Street in Lexington Avenue, in pretty much any direction at all, but if you have to go really, really, really far, like years upon light years upon light years out, you will, if you travel far enough, eventually find a galaxy. But that looks, and I mean exactly like our Milky Way. And in that galaxy, you will find a planet that is an absolute copy, a dead ringer for our planet Earth. And on that planet, you will find a city that is uncannily down to the hairs on the city rats exactly like this city in New York City. And in that city, there will be another 92nd Street YWYMHA with a building that has another auditorium in it that is exactly like this auditorium here.
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Robert and Brian Greene discuss what's beyond the horizon of our universe, what you might wear in infinite universes with finite pairs of designer shoes, and why the Universe and swiss cheese have more in common than you think.