Do Aliens Exist or not?

I can't really say they don't- I think they do, we haven't really explored the entire universe and there may be other universe out there with hundreds of galaxies too. So there is a possibility of life out there.. Hope we can communicate with them someday, peacefully.

I wouldn't completely discount the idea that they might exist. I have never seen an alien, but I have witnessed UFO's on two occaisions. Some people have these really weird dark brown reptilian eyes, too--I don't mean big and buggy, just weird. Anyone else notice that?

There is a very high possibility that extra terrestrial life do exist. If a planets environment favors life to grow then it will be possible. There are millions of planets out there and the possibility that a planet that has the same state as ours can possibly sustain life. From billions of stars the possibility is endless.

Considering that the universe is eternal and there is life on one planet wouldn't there also be an eternal number of planets with life on them even though they might be placed with an eternally long distance between them. I don't know if that made much sence, but to be clear. Yes I believe that we are not likely to be the only form of life in the universe or multiverse. :)

This universe is prettttyyy big so i guess other life could exist. I mean we haven't been to other planets so we don't know yet but there is a possibility Aliens might be on some other planets that humans don't know about.