Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas23 Nov 2020

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.

Support Mindscape on Patreon.

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

Det här avsnittet är hämtat från ett öppet RSS-flöde och publiceras inte av Podme. Det kan innehålla reklam.

Avsnitt(441)

365 | Vitor Cardoso on Why Black Holes Are Special

Black holes, as Stephen Hawking discovered, do grow old: they emit radiation, lose mass, and eventually evaporate away. But our fascination with black holes never grows old. This is especially true to...

24 Aug 1h 5min

364 | Stuart Firestein on How Science Relies on Ignorance and Failure

One of the paradoxes of science is that it seeks objectively true understanding of the world, but its methodology is driven by ignorance, failure, and uncertainty. Some phenomena we understand pretty ...

17 Aug 1h 16min

363 | Chandra Sripada on How LLMs and Humans are Cognitive Cousins

Large Language Models display an uncanny ability to construct human-sounding speech, and can synthesize concepts in novel ways. Is this because they are truly thinking like human beings in some way, o...

10 Aug 1h 51min

Mindscape Ask Me Anything, Sean Carroll | August 2026

Welcome to the August 2026 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 Patr...

3 Aug 3h 57min

362 | Luis Bettencourt on the Universal Properties of Self-Organizing Cities

People who live in large cities produce more patents per person than those who live in small towns. They also walk faster down the street, and use less infrastructure per person. Indeed, the relations...

27 Juli 1h 20min

361 | Bonnie Bassler on How Bacteria Talk and Work Together

One of the characteristics of life is that living organisms gather information and put it to use. Even one of the simplest lifeforms, bacteria, are able to sense features of their surroundings and alt...

20 Juli 1h 15min

Mindscape Ask Me Anything, Sean Carroll | July 2026

Welcome to the July 2026 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 Patreo...

13 Juli 4h 3min

360 | Marc Berman on the Science of Touching Grass

Modern life has, in many ways, removed us from the environments in which our ancestors lived and adapted. Not only do we spend time looking at screens, but we spend time indoors, or outdoors but in ur...

6 Juli 1h 29min