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)

187 | Andrew Leigh on the Politics of Looming Disasters

187 | Andrew Leigh on the Politics of Looming Disasters

We're pretty well-calibrated when it comes to dealing with common, everyday-level setbacks. But our brains aren't naturally equipped for dealing with unlikely but world-catastrophic disasters. Yet suc...

7 Maalis 20221h 20min

186 | Sherry Turkle on How Technology Affects Our Humanity

186 | Sherry Turkle on How Technology Affects Our Humanity

Advances in technology have gradually been extending the human self beyond its biological extent, as we augment who we are with a variety of interconnected devices. There are obvious benefits to this ...

28 Helmi 20221h 11min

185 | Arvid Ågren on the Gene's-Eye View of Evolution

185 | Arvid Ågren on the Gene's-Eye View of Evolution

One of the brilliant achievements of Darwin's theory of natural selection was to help explain apparently "purposeful" or "designed" aspects of biology in a purely mechanistic theory of unguided evolut...

21 Helmi 20221h 25min

184 | Gary Marcus on Artificial Intelligence and Common Sense

184 | Gary Marcus on Artificial Intelligence and Common Sense

Artificial intelligence is everywhere around us. Deep-learning algorithms are used to classify images, suggest songs to us, and even to drive cars. But the quest to build truly "human" artificial inte...

14 Helmi 20221h 24min

AMA | February 2022

AMA | February 2022

Welcome to the February 2022 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). I take the large number of qu...

10 Helmi 20224h 15min

183 | Michael Dine on Supersymmetry, Anthropics, and the Future of Particle Physics

183 | Michael Dine on Supersymmetry, Anthropics, and the Future of Particle Physics

Modern particle physics is a victim of its own success. We have extremely good theories — so good that it's hard to know exactly how to move beyond them, since they agree with all the experiments. Yet...

7 Helmi 20221h 39min

182 | Sally Haslanger on Social Construction and Critical Theory

182 | Sally Haslanger on Social Construction and Critical Theory

Reality is just out there — but how we perceive reality and talk about it depends on choices we human beings make. We decide (consciously or not) to conceptualize the world in certain ways, whether it...

31 Tammi 20221h 37min

181 | Peter Dodds on Quantifying the Shape of Stories

181 | Peter Dodds on Quantifying the Shape of Stories

A good story takes you on an emotional journey, with ups and downs along the way. Thanks to science, we can quantify that. Peter Dodds works on understanding the structure of stories and other strings...

24 Tammi 20221h 16min

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