[mindcrime]

I think it's highly likely that intelligent life elsewhere in the universe either has existed, does exist, or will exist (or some combination of those).

OTOH, I think it's highly unlikely that UAP's or UFO's - or whatever you want to call them - are alien spacecraft piloted by intelligent extraterrestrials, coming to visit Earth, abduct and probe random humans, mutilate cattle, make crop circles, etc.

That said, over the last 30 years or so, as we've discovered more and more "potentially habitable" planets, some closer to Earth than the ones that were previously known, my skepticism on "alien visitors" as diminished very slightly. But it still seems unlikely to me that any intelligent life that exists, is close enough, or has the means to travel interstellar distances quickly enough, to permit tourist visits to Earth.