4.8 • 4.4K Ratings
🗓️ 19 June 2023
⏱️ 86 minutes
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It's somewhat amazing that cosmology, the study of the universe as a whole, can make any progress at all. But it has, especially so in recent decades. Partly that's because nature has been kind to us in some ways: the universe is quite a simple place on large scales and at early times. Another reason is a leap forward in the data we have collected, and in the growing use of a powerful tool: computer simulations. I talk with cosmologist Andrew Pontzen on what we know about the universe, and how simulations have helped us figure it out. We also touch on hot topics in cosmology (early galaxies discovered by JWST) as well as philosophical issues (are simulations data or theory?).
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Blog post with transcript: https://www.preposterousuniverse.com/podcast/2023/06/19/240-andrew-pontz…and-the-universe/
Andrew Pontzen received his Ph.D. in astronomy from the University of Cambridge. He is currently Professor of Cosmology at University College London. In addition to his research in cosmology, he frequently writes popular articles and appears in science documentaries. His new book is The Universe in a Box: Simulations and the Quest to Code the Cosmos.
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0:00.0 | Hello, everyone and welcome to the Mindscape podcast. I'm your host Sean Carroll. We talk about science a lot here at Mindscape |
0:06.8 | I don't think anyone could avoid getting that impression |
0:10.1 | But you know we talk about other things too. I do try to let people in on the details the real world details of how science |
0:20.6 | gets done |
0:22.0 | It's not always straightforward. It's a little bit less. It's different. Let's say then the |
0:28.3 | Press release model right like the way that we learn about science is very often because some scientists have done something and then if it's a discovery |
0:37.2 | Experimentally or like a really cool theory. They will have a press release or there will be newspaper or |
0:43.1 | Internet articles or whatever or the right to book or have a podcast etc |
0:47.1 | That's not really how science gets done science is much more incremental. It's much more gradual and |
0:54.8 | There's a lot of tools that people use so today's |
0:58.9 | Subject matter is a little bit different. We're talking about cosmology, but we're talking about |
1:03.7 | Specifically the role of computer simulations in cosmology our guest is Andrew Ponson who is a cosmologist at UC London over there in the UK |
1:13.2 | He has a new book that just came out called the universe in a box |
1:17.8 | Simulations and the quest to code the cosmos and I love the topic because he talks a lot about the |
1:24.1 | Big Bang cosmology inflation dark matter etc |
1:27.0 | But the central organizing principle is how we use |
1:31.7 | computer simulations to do this kind of science and |
1:37.2 | That's both crucially important because these days you can't you know that the theories are so complicated that you can't |
1:43.3 | Make very good detailed |
1:45.6 | Predictions with a pencil and paper you really need to use a computer simulation and |
1:49.8 | And because that act which seems kind of innocent. Let's just put it on a computer and simulate it |
1:55.3 | Maybe it's not so innocent after all. I mean not I don't mean not innocent in the sense of guilty |
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