Artist s conception of the exoplanet Proxima b, orbiting Proxima Centauri (Credit: ESO/M. Kornmesser)
Late in 2020 remember 2020? We had so much fun astronomers reported radio signals from Proxima Centauri, which, as you know, is at present the closest star to the Sun. This sort of thing cannot be due to aliens (of course)… but just suppose it were.
If the signal is from entities native to the Proximan system (which is now known to have at least two worlds, one of which is a terrestrial world in the liquid water zone) then either we got stupendously lucky or technological life is very, very common. If the aliens are not native to Proxima, then they got there somehow, which strongly suggests that: