20 April 2015

No Supercivilizations in 100,000 nearest galaxies?


I am of the view that the apparent absence of "supercivilizations" within a pretty great distance from the Milky Way says virtually nothing about the possibility that spacefaring civilizations, which may have reached a steady state or slow growth but remain essentially undetectable at great distance, could well exist in some numbers. This is one more nail in the coffin, though, for Carl Sagan's prediction that millions of civilizations exist out there in our Galaxy, with its 100-300 billion stars. It's now pretty clear that intelligent life is at best rare.

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