Quote:
Originally Posted by alnorth
I do think there's a chance that we may detect a faint signal someday. We'd know roughly where it came from, but probably wouldn't be able to make sense of it other than its unnatural.
But then what? We'd be detecting the trace of what a civilization was sending out at least millennia ago, if not millions or billions of years ago, we'd never be able to have a conversation or see each other, and they would probably be dead by the time we got the signal. It would just be stuff for poets and philosophers to talk about.
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Contacting another live civilization would have lots of external impacts. Proving that another live civilization exists would have lots of internal impacts.