Extremely-Bad-Idea t1_itf3vdp wrote on October 23, 2022 at 4:13 AM

Might "signatures of alien technology" include gigantic orbiting garbage dumps? LOL

I hate to say it, but evidence of pollution might be a strong indication of advanced life forms. Squirrels and birds don't produce mountains of plastic, paper, and industrial waste.

evildork t1_ith5nvt wrote on October 23, 2022 at 4:51 PM

One possible technosignature that we could detect is high levels of CFCs in the atmosphere of an exoplanet. They're industrially useful chemicals with no known natural means of production.