All those galaxies in the middle panel took quite a long time to draw. But I think the end result turned out looking rather nice.
Personally, I believe that life of some sort has to exist somewhere else in the universe. Statistically, it would be EXTREMELY unlikely that only one planet in the whole universe could harbor life. Honestly, I don't know which would be cooler: if we're the only ones out there, or if we're just one of millions of alien civilizations.