do you believe aliens exist?

I think it's obvious that aliens exist - there are billions galaxies and each of them may have more than billion stars and around each start there could be hundreds of planets. Do you believe that only Earth is capable of containing life? I think that there could be millions of intelligent creatures in the Universe and most of them at a higher level of Evolution process. I even believe that alien influenced life on Earth billions of years ago. But I think that most of people claiming to have seen aliens speculate with it just to become famous and that makes a lot of people being skeptic about it but despite the fake testimonials there are cases that seem to be real and still don't have rational explanation.

The universe is so large that you can't help but wonder if we're alone. But man has been searching for aliens and still there's no proof yet that they exist. What we hear are just rumors and hearsay but there's really no concrete proof that they exist. So that means they don't not unless i see one myself

If you believe in aliens.. then surely they will hit earth by 2012. As far as for me this question, i would like to say , I DON'T KNOW anything about alien. I have not seen one yet..if i will see, then i will believe, and i am sure you will also believe. Just by saying you are male, i can't believe on you, because i have not seen you yet...so i have to see you real , face to face, then i can say truely you are male or female..it is something like that.... there are so many stories about aliens...they are good to read. -vine.

i don't really know if they truly exist but one thing is for sure, if it has been proven that they exist... Earth will be in SHOCK!