[Neoxter]

If *intelligent* life were possible elsewhere in the galaxy, then we'd have been aware of it a long time ago. That intelligent life would really only have to succeed on one other occasion to propagate throughout the galaxy by this present point in time. That the speed with which our own human life sprung up was so quick, that if it were easily developed elsewhere in the universe, it would have had many opportunities in the distant past to do so, of which at least one other species would have succeeded by now if it were possible. That it has not, or that we are not aware of any, suggests that either it has never happened, or has happened in a way in which we will never be aware. And that therefore our understanding of other form of life is not likely to ever change.