[ExI] Galactic civilizations may be impossible

[BillK]

Galactic civilizations may be impossible. Here’s why.
December 11, 2024   Adam Frank

The problem for galactic-scale civilizations comes down to two numbers.
For galactic-scale civilizations to exist in our Universe, they would
have to overcome two major hurdles related to physics and biology.
<https://bigthink.com/13-8/galactic-civilizations-may-be-impossible-heres-why/>

One is the sheer distance between each society.
The other is biological life span.
Astronomer Adam Frank outlines the difficulties with each problem.
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Reality is a pain. Spoiling all our fun!
BillK