How people really think that there isn’t life outside earth it’s seem illogical really,(reply>), @Maynard's Spaceship If the simplest self-replicating molecule (or other structure) has, say, 100 elements of 4 kinds, then it will take astronomical number of random combinations (4 to the power of 100) to create it. In such case there's no life in observable universe besides us. Of course, we don't know complexity of the simplest "alive" molecule. Neither do we know if the Universe is infinite or not.,(reply>), @Maynard's Spaceship There is no proof so far,(reply>), Considering how !@#$ it is here, it's quite reasonable to side with Fermi and think it's all dead already.,(reply>), How do?