124 | Solo: How Time Travel Could and Should Work

124 | Solo: How Time Travel Could and Should Work

Time! It doesn't stop, psychological effects of being under lockdown notwithstanding. How we experience time depends on our situation, but time itself just marches forward. Unless, of course, it's possible to travel to the past, as countless science-fiction scenarios have depicted. But does that really make sense? Couldn't we then change the past, even so dramatically that our own existence would never have happened? In this solo podcast I talk about both the physics and fiction of time travel. I point out that it might be allowed by the laws of physics, and explain how that would work, but that we really don't know. And I try to make sense of some of the less-sensible depictions of cinematic time travel. Coming up with a logical theory that could account for Back to the Future isn't easy, but podcasting isn't for the squeamish.

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But wait, there's more! I was contacted by Janna Levin, who we fondly remember from Episode 27. Janna moonlights as Chair and Director of Sciences at Pioneer Works, an institution dedicated to bringing together creative people in art and science. Like the rest of us, they've been looking for ways to offer more online content in these pandemic times, so we thought about ways to collaborate. Here's what they came up with: artist Azikiwe Mohammed has created an animated video backdrop to this podcast episode. The visuals are trippy, colorful, and inspired by (without trying to directly illustrate) what I talk about in the episode. You can check out a brief write-up at the Pioneer Works site, or view the video directly below.

https://www.youtube.com/watch?v=kHy1j4LiyGQ

Jaksot(416)

267 | Benjamin Breen on Margaret Mead, Psychedelics, and Utopia

267 | Benjamin Breen on Margaret Mead, Psychedelics, and Utopia

The twentieth century was something, wasn't it? Margaret Mead, as well as her onetime-husband Gregory Bateson, managed to play roles in several of its key developments: social anthropology and its imp...

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266 | Christoph Adami on How Information Makes Sense of Biology

266 | Christoph Adami on How Information Makes Sense of Biology

Evolution is sometimes described -- not precisely, but with some justification -- as being about the "survival of the fittest." But that idea doesn't work unless there is some way for one generation t...

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AMA | February 2024

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Welcome to the February 2024 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). We take questions asked by Pa...

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265 | John Skrentny on How the Economy Mistreats STEM Workers

265 | John Skrentny on How the Economy Mistreats STEM Workers

Universities and their students are constantly being encouraged to produce more graduates majoring in STEM fields -- science, technology, engineering, and mathematics. That's the kind of training that...

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264 | Sabine Stanley on What's Inside Planets

264 | Sabine Stanley on What's Inside Planets

The radius of the Earth is over 6,000 kilometers, but the deepest we've ever dug below the surface is only about 12 km. Yet we have a quite reliable idea of the structure of the Earth's interior -- in...

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263 | Chris Quigg on Symmetry and the Birth of the Standard Model

263 | Chris Quigg on Symmetry and the Birth of the Standard Model

Einstein's theory of general relativity is distinguished by its singular simplicity and beauty. The Standard Model of Particle Physics, by contrast, is a bit of a mess. So many particles and interacti...

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262 | Eric Schwitzgebel on the Weirdness of the World

262 | Eric Schwitzgebel on the Weirdness of the World

Scientists and philosophers sometimes advocate pretty outrageous-sounding ideas about the fundamental nature of reality. (Arguably I have been guilty of this.) It shouldn't be surprising that reality,...

15 Tammi 20241h 20min

261 | Sanjana Curtis on the Origins of the Elements

261 | Sanjana Curtis on the Origins of the Elements

In mid-20th-century cosmology, there was a debate over the origin of the chemical elements. Some thought that they could be produced in the Big Bang, while others argued that they were made inside sta...

8 Tammi 20241h 7min

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