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

Watch my exclusive video Planetary Archives & Stasis Vaults: https://nebula.tv/videos/isaacarthur...
Get Nebula using my link for 40% off an annual subscription: https://go.nebula.tv/isaacarthur'>https://go.nebula.tv/isaacarthur
Get a Lifetime Membership to Nebula for only $300: https://go.nebula.tv/lifetime?ref=isa...
Use the link gift.nebula.tv/isaacarthur to give a year of Nebula to a friend for just $30.

Join this channel to get access to perks:
   / @isaacarthursfia  
Visit our Website: http://www.isaacarthur.net
Join Nebula: https://go.nebula.tv/isaacarthur'>https://go.nebula.tv/isaacarthur
Support us on Patreon:   / isaacarthur  
Support us on Subscribestar: https://www.subscribestar.com/isaaca...
Facebook Group:   / 1583992725237264  
Reddit:   / isaacarthur  
Twitter:   / isaac_a_arthur   on Twitter and RT our future content.
SFIA Discord Server:   / discord  

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