well, there is a chance that there might have been some life forms on mars a long long time ago but that species got wiped out...it's also possible that the organisms found on mars could be the first step in evolution (which isn't possible anymore on that planet since it can't support life anymore due to the disappearance of water)....i dont think it will happen in our lifetime though...i highly doubt it...but yes, i do believe that there are life forms in other parts of the universe, and that multiple universes exist, and also that even though the life forms don't exist now, they either existed before or will exist in the future...it just seems really impossible to me that in such a big universe with trillions and trillions of planets and moons, we are the only place with life, that's just too far fetched