Even if it's as rare as one in a billion we'd still have to map billions of suns, their planets and actually look for it. Other than SETI I don't know any reall

Even if it's as rare as one in a billion we'd still have to map billions of suns, their planets and actually look for it. Other than SETI I don't know any really serious, concerted efforts to looks for other signals of life. Even the discovery here was somewhat random and required someone to start digging through recorded data.