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*“I was born in the wrong generation” ha(i)s turned from edgy to a(nd) sad reality for some
OP’s criteria is for an equal (equivalent) alien civilization.
If they were to have what we have, they would be able to detect (infer) atmospheric composition filled with the byproducts of industrialization. It’s not ideal, but IMO we’re halfway there. I can’t recall the system’s designation, but there was some hubbub about one where the Sun’s light was interrupted by some huge mass which seemed to not follow an irregular (hypothetically artificial and intelligently controlled) orbit. I can’t wait for the tech to improve, this is exciting stuff.
What do you mean if? We’ve been doing that for years, and so far as I understand it, the only reason that we haven’t found any is that there are millions of solar systems to check.
Plot twist, OP is 98 years old, and they’re not talking about the weather.
Most of the ones I know do, but there are plenty without, just not nearly as many as Gen’s Y & Z.