According to some theories, meteors may be the motherships of planet-populating microorganisms. No one knows whether life started on earth, or came from meteors from a far away solar system, or both.

I was watching a documentary about the creation of Earth on the Discovery Channel last night, and I was disappointed that they didn't touch on how life started. It jumped from creating conditions needed to sustain life and the prescence of amino acids, to single celled organisms. The story between those points is extremely important. How did it go from simple amino acids to a self-replicating acid that is contained within the complex structure of a cell?

Anyway, I really want this finding to be true, because I want there to be other planets with life, but I'll have to wait on that.