i'm willing to believe in many things but i just cant see how anyone would take the subject of UFO's seriously, in my mind in the majority of cases it is people's imagination getting the better of them, its often the case that the people who report sighting are perfectly ordinary people, leading perfectly ordinary lives, and so we're supposed to take their word as truth, i believe that they conjure up these flying saucers and the likes from their overly suppressed imagination, after all they're stuck in the same routine day to day, living their drab exisitence then they catch sight of something unusual and of course it has to be aliens, however in the vast majority of cases what they are seeing can be explained as either regular aircraft, sightings of venus or unusual atmospheric conditions, once u filter all of these out u are left with a handful of cases that cannot be explaned but thats not to say they have to be aliens or flying saucers, and as for roswell, there were no aliens, the most likely scenario was that the US government was testing a new secret aircraft and something went terribly wrong. There are spy satellites watching over every inch of land and sea, if u r to believe in UFO's and alien visitations u would have to conclude that the world's governments were covering it all up, and personnaly i ust dont think that they're smart enough..
however on to the subject of life existing somewhere in the universe other than earth, of course it does, of that i have no doubt, there is nothing particulary remarkable about earth, and all it takes for the creation of life is a few basic minerals and a spark of electricity, nothing so sacred as religion would have us believe, however why would we want to go about searching for extra-terestrials, even if they do exist they would be millions of billions of light years away, we would never reach them, or even communicate with them, anyway whats the point? i believe we can learn much more from searching on the inside and discovering more about who we are...
and then there's always the possiblity that these visitations and sightings are resulted from visitation of beings from parallel dimensions, or perhaps even from the future or the past, inter-dimensional time travel anyone?