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.

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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

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