sambuca, i'm sure you have read about panspermia or exogenesis - the idea that life on earth was seeded from elsewhere in the universe. if not, the wikipedia article on it is pretty good. probably written by a pro-panspermia author, it presents a lot of circumstantial evidence for the idea that you describe:
http://en.wikipedia.org/wiki/Panspermia.
from a programmed reality standpoint, the "seeds of life" are of probably found everywhere in the universe, since, by definition, the universe is the construct in which we play - so it has to contain everything needed to explain our existence. and it would certainly be an interesting aspect of reality to discover our connection to a deeper origin.