Hmm, well my take on all of it is this.
I remember a couple of years ago talking to a religious friend about this and he said, "you know how all the scientists talk about the big bang theory. Well, did you ever think it was too coicendtial that everything worked out so nicely? Somebody or something must have caused the big bang."
AND up until that point, I was comfortable and satisfied with the theory of evolution, big bang, etc, etc. I have to admit that his point sorta stumped me and forced me to think a little bit more.
BTW, hmmm, alien seed theory is possible, but the men in black suits, parked in a black crown victoria in front of my house, would have me say otherwise, lol.