what I would like to know, is at what distance could webb find the earth's identical twin? and idetify multiple unequivical signs of life. I dont think it's ve

what I would like to know, is at what distance could webb find the earth's identical twin? and idetify multiple unequivical signs of life. I dont think it's very far, and there may be no candidates in range, so whats the best fit we might find, or do we realy need a bigger telescope?