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)

161 | W. Brian Arthur on Complexity Economics

161 | W. Brian Arthur on Complexity Economics

Economies in the modern world are incredibly complex systems. But when we sit down to think about them in quantitative ways, it's natural to keep things simple at first. We look for reliable relations...

23 Elo 20211h 35min

160 | Edward Slingerland on Confucianism, Daoism, and Wu Wei

160 | Edward Slingerland on Confucianism, Daoism, and Wu Wei

Plato and Aristotle founded much of what we think of as Western philosophy during the fourth and fifth centuries BCE. Interestingly, that historical period also witnessed the foundation of some of the...

16 Elo 20211h 23min

AMA | August 2021

AMA | August 2021

Welcome to the August 2021 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 ques...

12 Elo 20213h 11min

159 | Mari Ruti on Lack, Love, and Psychoanalysis

159 | Mari Ruti on Lack, Love, and Psychoanalysis

Neuroscience has given us great insights into how our brains work. But there is still room for purely humanistic disciplines to help us think through our thoughts and emotions, not to mention the mean...

9 Elo 20211h 49min

158 | David Wallace on the Arrow of Time

158 | David Wallace on the Arrow of Time

The arrow of time — all the ways in which the past differs from the future — is a fascinating subject because it connects everyday phenomena (memory, aging, cause and effect) to deep questions in phys...

2 Elo 20211h 47min

157 | Elizabeth Strychalski on Synthetic Cells and the Rules of Biology

157 | Elizabeth Strychalski on Synthetic Cells and the Rules of Biology

Natural selection has done a pretty good job at creating a wide variety of living species, but we humans can't help but wonder whether we could do better. Using existing genomes as a starting point, b...

26 Heinä 20211h 17min

156 | Catherine D'Ignazio on Data, Objectivity, and Bias

156 | Catherine D'Ignazio on Data, Objectivity, and Bias

How can data be biased? Isn't it supposed to be an objective reflection of the real world? We all know that these are somewhat naive rhetorical questions, since data can easily inherit bias from the p...

19 Heinä 20211h 28min

155 | Stephen Wolfram on Computation, Hypergraphs, and Fundamental Physics

155 | Stephen Wolfram on Computation, Hypergraphs, and Fundamental Physics

It's not easy, figuring out the fundamental laws of physics. It's even harder when your chosen methodology is to essentially start from scratch, positing a simple underlying system and a simple set of...

12 Heinä 20212h 40min

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