According to astronomers, the theory is that there are many planets in the universe other than Earth (see Earthlike planets ‘common in Universe’ ) and that many may harbor life. Some or many of these planets life forms might even be more “intelligent” than humans. I agree that this seems plausible based on our current knowledge but what I have been unable to reconcile, if this is so, is why at least a few of these advanced races haven’t openly visited Earth yet (like landed in Washington D.C… Moscow, Beijing or wherever).
Given that there IF there are a reasonably large number of other sentient life forms, statistically speaking, it would seem that at least a few should have passed through this region of space during our recorded history and should have dropped in and tried to say hello. Hell, at least we should have discovered a clear attempt at communication via radio or whatever.
Following classic science fiction, perhaps the good races really don’t want to influence our development, so they hide from us. But one would think that there must also be some evil races that would have said, screw it, let’s invade and take this thing/stuff that is useful to us.
So perhaps there really AREN’T any other life forms (at least in this galaxy)? Maybe we are all alone in the universe, an evolutionary stroke of luck? Or maybe interstellar travel isn’t really possible? Or maybe there were other races but as each race reaches a certain technological level, they wind up destroying themselves back into their equivalent of our stone age?
Anyone else ever ponder these questions?