I don't think so coz I think we are all aliens. Ha ha ha.... Question would be: "Does Human Being exists?"
do I believe in life in the universe besides ours yes! but do these aliens come to earth in flying saucers and abduct ppl hell no. Theres too many camera phones for there to be no real good evidence.
Maybe, as the universe is soo big. Even if they do, theres no way we can reach them. Even if alien do exist, whats the chance that they are smarter than us. heres a interesting article. http://www.dailymail.co.uk/sciencetech/article-450467/Found-20-light-years-away-New-Earth.html
That doesn't mean they would be technologically advanced with the ability to drop by and create cropcircles.
Okay I may be new here, but I am not new to aliens. Yeah, aliens only exist, in America. I think it has something to do with... probing. And we all know aliens go crazy over American cows. They probably have Cow Bell on their planet like America has Taco Bell. Let me tell you something about aliens, why would they fly half-way across the universe to come talk / probe / or kidnap you? I think you need to be really conceited to believe you are so special in this universe that bored aliens will come and play hide the probe with you. Forgive me for not believe in aliens, I am merely being honest. Really, we are not even a type 1 civilization! We are a zero type civilization who can't even get to Mars. Why should any type 5 or lower aliens want to deal with backwater humans?
Have given it a bit of though, and concluded we CANT be alone....there HAS to be something else out there.