Robin Hanson - 2022 - Alien Civilizations Are Expanding Rapidly

Robin Hanson explains two kinds of alien civilizations. “Quiet” aliens who don’t expand or change much, and then they die. We have little data on them, and so must mostly speculate, via methods like the Drake equation.

“Loud” aliens, in contrast, visibly change the volumes they control, and just keep expanding fast until they meet each other. They should be easy to see as they will be reorganizing the stars and galaxies they are in.

If these "grabby" aliens exist and start expanding at over one-third the speed of light then we would not see their changes until the aliens get very close. Robin Hanson models that there is intelligent grabby aliens once in every million galaxies.
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This video is excepted from ' Robin Hanson: Alien Civilizations, UFOs, and the Future of Humanity | Lex Fridman Podcast #292 ' - https://youtu.be/KBZP4rLk6bk
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Related video:
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Humanity was born way ahead of its time. The reason is grabby aliens. - https://youtu.be/l3whaviTqqg
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https://rumble.com/v28etbi-robin-hanson-ufo-sightings-explained.html
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https://rumble.com/v28dzli-robin-hanson-2014-the-great-filter.html