Europa is very interesting, ever since it's been proven we have life on earth that requires no sunlight, Europa has been the leading candidate for ET life in our solar system In my opinion. If there is as much volcanic activity on Europa as we believe, I see a direct comparison with the scenario we have here in our own oceans, life swarming around the vents below, never seeing the light of our Sun......if that life has or could develop intelligence to the point of communication is not relevant as far as I'm concerned, if it's there in any form, it would be the greatest discovery of our time.