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)

273 | Stefanos Geroulanos on the Invention of Prehistory

273 | Stefanos Geroulanos on the Invention of Prehistory

Humanity itself might be the hardest thing for scientists to study fairly and accurately. Not only do we come to the subject with certain inevitable preconceptions, but it's hard to resist the temptat...

22 Huhti 20241h 19min

272 | Leslie Valiant on Learning and Educability in Computers and People

272 | Leslie Valiant on Learning and Educability in Computers and People

Science is enabled by the fact that the natural world exhibits predictability and regularity, at least to some extent. Scientists collect data about what happens in the world, then try to suggest "law...

15 Huhti 20241h 8min

AMA | April 2024

AMA | April 2024

Welcome to the April 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 Patre...

8 Huhti 20243h 14min

271 | Claudia de Rham on Modifying General Relativity

271 | Claudia de Rham on Modifying General Relativity

Einstein's theory of general relativity has been our best understanding of gravity for over a century, withstanding a variety of experimental challenges of ever-increasing precision. But we have to be...

1 Huhti 20241h 21min

270 | Solo: The Coming Transition in How Humanity Lives

270 | Solo: The Coming Transition in How Humanity Lives

Technology is changing the world, in good and bad ways. Artificial intelligence, internet connectivity, biological engineering, and climate change are dramatically altering the parameters of human lif...

25 Maalis 20242h 9min

269 | Sahar Heydari Fard on Complexity, Justice, and Social Dynamics

269 | Sahar Heydari Fard on Complexity, Justice, and Social Dynamics

When it comes to social change, two questions immediately present themselves: What kind of change do we want to see happen? And, how do we bring it about? These questions are distinct but related; the...

18 Maalis 20241h 11min

AMA | March 2024

AMA | March 2024

Welcome to the March 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 Patre...

11 Maalis 20243h 55min

268 | Matt Strassler on Relativity, Fields, and the Language of Reality

268 | Matt Strassler on Relativity, Fields, and the Language of Reality

In the 1860s, James Clerk Maxwell argued that light was a wave of electric and magnetic fields. But it took over four decades for physicists to put together the theory of special relativity, which cor...

4 Maalis 20241h 30min

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