Dormant Alien Empires: Could Advanced Civilizations Be Sleeping?

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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
Lombus, "Cosmic Soup"
Sergey Cheremisinov, "Labyrinth"
Stellardrone, "Red Giant", "The Divine Cosmos"
Select imagery/video supplied by Getty Images