# Why Haven’t We Found Dyson Spheres Yet?

Page: https://stenobird.com/podcast/science-futurism-with-isaac-arthur-714313/why-haven-t-we-found-dyson-spheres-yet
Text version: https://stenobird.com/podcast/science-futurism-with-isaac-arthur-714313/why-haven-t-we-found-dyson-spheres-yet.md
Podcast: [Science & Futurism with Isaac Arthur](https://stenobird.com/podcast/science-futurism-with-isaac-arthur-714313)
Published: 2026-06-20T13:00:00+00:00
Episode link: https://rss.art19.com/episodes/9d4e081c-a34f-4f50-9db8-60c17f06b718.mp3?rss_browser=BAhJIg90cmFuc2NyaWJyBjoGRVQ%3D--952c5701c84ad333c69d5faa668f8177091704f0
Audio file: https://rss.art19.com/episodes/9d4e081c-a34f-4f50-9db8-60c17f06b718.mp3?rss_browser=BAhJIg90cmFuc2NyaWJyBjoGRVQ%3D--952c5701c84ad333c69d5faa668f8177091704f0
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JSON: https://stenobird.com/v1/public/podcasts/science-futurism-with-isaac-arthur-714313/episodes/why-haven-t-we-found-dyson-spheres-yet
Duration seconds: 2333

## Resource

From Dysonian SETI to waste heat and galactic timelines, we explore why we haven’t found Dyson Spheres—and what their absence reveals about civilization. Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/isaacarthur Watch my exclusive video Nearby Supernovae: https://nebula.tv/videos/isaacarthur-nearby-supernovae-could-one-destroy-earth-and-could-we-stop-it 🛒 SFIA Merchandise: https://isaac-arthur-shop.fourthwall.com/ 🌐 Visit our Website: http://www.isaacarthur.net ❤️ Support us on Patreon: https://www.patreon.com/IsaacArthur ⭐ Support us on Subscribestar: https://www.subscribestar.com/isaac-arthur 👥 Facebook Group: https://www.facebook.com/groups/1583992725237264/ 📣 Reddit Community: https://www.reddit.com/r/IsaacArthur/ 🐦 Follow on Twitter / X: https://twitter.com/Isaac_A_Arthur 💬 SFIA Discord Server: https://discord.gg/53GAShE Credits: Why Haven’t We Found Dyson Spheres Yet? Written, Produced & Narrated by: Isaac Arthur Music Courtesy of Stellardrone & Chris Zabriskie Select imagery/video supplied by Getty Images, Jeremy Jozwik, Ken York, Sergio Botero Chapters 0:00 Intro 2:41 What Could We Actually See? 9:11 The Timeline Problem 12:24 Looking Out Is Looking Back 17:42 The Dyson Dilemma 26:07 Alternative Paths: Civilizations That Don’t Expand 29:26 Energy, Efficiency, and the Problem of Waste Heat 33:21 Nebula 34:22 The Silence of the Spheres See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .

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## Transcript

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