Fermi Paradox Disappearing Stars & Cosmic Voids

If the Universe is inhabited by older alien civilizations, those who have ventured out to the stars and colonized galaxies, we would expect to see a footprint of extraterrestrial activity. Could the many stars whose brightness has dimmed be indicative of Dyson Spheres or other Megastructures? Could the Cosmic Voids vastly bigger than any galaxy be the work of even greater and older starfaring species?
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Credits:
The Fermi Paradox: Disappearing Stars & Cosmic Voids
Episode 248; July 23, 2020
Written, Produced & Narrated by Isaac Arthur
Editors:
S. Kopperud
Cooper de Ruiter
Daniel Paul Bobo
Keith Blockus
Cover Art - Jakub Grygier https://www.artstation.com/jakub_grygier
Graphics:
Fishy Tree https://www.deviantart.com/fishytree/
Jarred Eagley
Jeremy Jozwik https://www.artstation.com/zeuxis_of_losdiajana
Mihail Yordanov
Sergio Botero https://www.artstation.com/sboterod?fref=gc
Udo Schroeter
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

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