Here's another way of looking at the unanswerable question, dorkus - or at least the one I say is unanswerable and most religious people think they've answered once and for all:

Does evolution have a goal, i.e. is man or is life the goal?

If so, then you'd expect life to be a natural state development all over the universe, even if it's at various stages. Chances are small that there aren't other planets somewhere in some galaxies with mild enough conditions for life.