All this talk about creationism vs. evolutionism makes me wonder what you guys think about aliens...
Mormons believe God created as many worlds as the sands of the sea, and he put people on all of them which were of course created in his image. (they are all human)
If you are an evolutionist, then my argument would be that nature repeats itself all over, so naturally if one world exists, then many would exist, and the beings on each planet would resemble those on Earth, with only minor differences.
It isnt logical to me that only one planet in the entire universe would have life on it. Thats so egotistical, just like when people thought earth was the center of the universe. And in fact many individuals still see themselves as the center of the universe.