Which idiots still think we are alone? Look at 'our' universe, 1 sun and 9(?) planets, one which sustains life (Earth) There are millions of suns (Stars) out there, so the chance that there is another planet out there which sustains life is so big...
First: WRONG SECTION!!!
And now: of course we're not alone, there are enough planets, galaxies ans stars to make another universe. I also think that if some day we get in touch with them, we will not be the 'commanding officer' if you get the idea. I think it would be bad for us. And Stephen Hawkings thinks that too, so...