don't have enough information to have a truly defendable position one way or the other. i think it's probable there is some form of life at there, like bacteria under a rock type life. however i think it improbable there is intelligent, sophisticated life like humans out there. i don't say that to be narcissistic, i say it because of how unlikely it is that there are suitable conditions out there, like those on earth, in many locations.

Yes, at least in a unicelular level.

who says life like humans aren't adapting to something we never heard about before? Who says it has to be a certain measure away from a light source with lots of water etc

could be, but even so, it's unlikely to be on a barren gassy rock. it still has certain requirements which are likely to be very specific, even if they differ from ours. i really doubt there's life out there that isn't based on carbon or at least silicon, though.

I think it's highly unlikely that doesn't exist SOMEWHERE else in the universe, and I'd bet it occurs many times in our own galaxy.

Yes, because:

N = R* x fp x ne x fl x fi x fc x L

http://en.wikipedia.org/wiki/Drake_equation

The Drake equation is closely related to the Fermi paradox in that Drake suggested that a large number of extraterrestrial civilizations would form, but that the lack of evidence of such civilizations (the Fermi paradox) suggests that technological civilizations tend to destroy themselves rather quickly.

There are very many planets. This inevitably will include some Earth-like planets.

(….)The anthropic alternative to the design hypothesis is statistical. Scientists invoke the magic of large numbers. It has been estimated that there are between 100 billion and 300 billion planets in our galaxy, and about 100 billion galaxies in the universe. Knocking a few noughts off for reasons of ordinary prudence, a billion billion is a conservative estimate of the number of available planets in the universe. Now suppose the origin of life, the spontaneous arising of something equivalent to DNA, really was quite a staggeringly improbable event. Suppose it was so improbable as to occur on only one in a billion planets. (….) But here we are talking about odds of one in a billion. And yet … even with such absurdly long odds, life will still have arisen on a billion planets – of which Earth of course, is one. The conclusion is so surprising I’ll say it again. If the odds of life originating spontaneously on a planet were a billion to one against, nevertheless that stupefying improbable event would still happen on a billion planets. The chance of finding any one of those billion life-bearing planets recalls the proverbial needle in a haystack. But we don’t have to go out of our way to find a needle because (back to the anthropic principle) any beings capable of looking must necessarily be sitting on one of these prodigiously rare needles before they even start the search.