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EPISODE · Jun 20, 2026

Why Haven’t We Found Dyson Spheres Yet?

from Science & Futurism with Isaac Arthur

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/isaacarthurWatch 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/53GAShECredits:Why Haven’t We Found Dyson Spheres Yet?Written, Produced & Narrated by: Isaac ArthurMusic Courtesy of Stellardrone & Chris Zabriskie Select imagery/video supplied by Getty Images, Jeremy Jozwik, Ken York, Sergio BoteroChapters0:00 Intro2:41 What Could We Actually See?9:11 The Timeline Problem12:24 Looking Out Is Looking Back17:42 The Dyson Dilemma26:07 Alternative Paths: Civilizations That Don’t Expand29:26 Energy, Efficiency, and the Problem of Waste Heat33:21 Nebula34:22 The Silence of the SpheresSee 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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This episode was published on June 20, 2026.

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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:...

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