[polishdude20]

That's also IF the life is space faring. We haven't even found life anywhere that is at least remotely simple let alone one that has built spacecraft.

[dougmwne]

But to be fair, it’s not like we’ve been able to look very many places. We’ve checked a few of the planets in our own solar system and it could be plausible to detect a civilization within a few light years by radio wave if we were very lucky.

https://physics.stackexchange.com/questions/245505/from-how-...