This is my favorite YouTube video.
If that doesn't work above here's the link:
http://www.youtube.com/watch?v=17jymDn0W6U
I think the universe is something humans will never understand fully. We may come across life but I highly doubt we'll know the true extent of the universe. It seems that the universe is never ending, but I wonder whether there is something beyond the universe, may be there are a collection of universes all within something else that is unknown? It's possible.
Us coming across life is certain though, not in our life time I don't think but possible in the future of humans. We have only explored as far as Mars in terms of studying planets atmospheres, there are signs that suggest life was once on Mars so I think that is our solar system it's possible there is life.
Ahh, the wonders of space, so many endless possibilities.