Dormant Alien Empires

When listen to void of space, we hear no alien signals, but could the galaxy be quiet because ancient empires slumber inside it?

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Credits:
Dormant Alien Empires
Episode 455a; July 14, 2024
Produced, Narrated & Written: Isaac Arthur
Editors: Darius Said & Mark Surber
Graphics:
Mihail Yordanov
Jeremy Jozwik
Ken York YD Visual
LegionTech Studios
Sergio Botero
Udo Schroeter
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator
Lombus, "Cosmic Soup"
Sergey Cheremisinov, "Labyrinth"
Stellardrone, "Red Giant", "The Divine Cosmos"
Select imagery/video supplied by Getty Images