{"podcast":{"title":"Science & Futurism with Isaac Arthur","slug":"science-futurism-with-isaac-arthur-714313","podcast_index_feed_id":714313,"rss_url":"https://rss.art19.com/science-and-futurism","website_url":"https://art19.com/shows/science-and-futurism","image_url":"https://content.production.cdn.art19.com/images/48/0f/01/7e/480f017e-9153-49c2-bb16-f9a230202d1e/1cf6f04131212d8279d9889b3b48e8c4908df66b5c970381882212f8b03f2040e64de59eabe3965d764340e3e66b7c9d2028bb8bfa1d0181800843205da31286.jpeg","author":"Isaac Arthur","episode_count":1226,"summary":"Science & Futurism with Isaac Arthur explores humanity’s long-term future through space exploration, advanced technology, and big-picture science. Hosted by National Space Society President Isaac Arthur, each episode uses real science and careful speculation to examine space colonization, megastructures, artificial intelligence, post-scarcity economies, and the physics shaping civilization beyond Earth.","last_synced_at":"2026-07-12T12:18:55.946166+00:00","page_url":"https://stenobird.com/podcast/science-futurism-with-isaac-arthur-714313"},"episode":{"title":"Why Haven’t We Found Dyson Spheres Yet? (Narration Only)","slug":"why-haven-t-we-found-dyson-spheres-yet-narration-only","published_at":"2026-06-20T13:00:00+00:00","page_url":"https://stenobird.com/podcast/science-futurism-with-isaac-arthur-714313/why-haven-t-we-found-dyson-spheres-yet-narration-only","show_page_url":"https://stenobird.com/podcast/science-futurism-with-isaac-arthur-714313","url":"https://rss.art19.com/episodes/5b17d046-c04a-4b0d-b0be-de1b488bff54.mp3?rss_browser=BAhJIg90cmFuc2NyaWJyBjoGRVQ%3D--952c5701c84ad333c69d5faa668f8177091704f0","audio_url":"https://rss.art19.com/episodes/5b17d046-c04a-4b0d-b0be-de1b488bff54.mp3?rss_browser=BAhJIg90cmFuc2NyaWJyBjoGRVQ%3D--952c5701c84ad333c69d5faa668f8177091704f0","summary":"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 .","meta_description":"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.…","key_points":[],"chapters":[],"topics":[],"duration_seconds":2314,"processing_state":"not_requested","actions":[{"name":"request_transcript","method":"POST","url":"https://stenobird.com/v1/public/podcasts/science-futurism-with-isaac-arthur-714313/episodes/why-haven-t-we-found-dyson-spheres-yet-narration-only/transcription-requests","description":"Idempotently request low-priority transcript generation for this episode."},{"name":"read_markdown","method":"GET","url":"https://stenobird.com/podcast/science-futurism-with-isaac-arthur-714313/why-haven-t-we-found-dyson-spheres-yet-narration-only.md","description":"Read the agent-friendly Markdown representation of this episode resource."}]}}