I was addressing your post:
“. . . all the amenities of earth – right temps, air composition, etc, where dangerous or intelligent (and selfish) life has not yet evolved…”
I suppose I misuderstood. It sounded like you were suggesting that given the right conditions, life might spontaneously emerge. This has not been shown to be possible, although it is a commonly held idea in our culture. Treading close to a banned topic, this is all I will say about it. Life exists in this world as created by God. It has not been revealed whether He did so elsewhere.
I have the credentials to speak from a position of authority with regards to science, but for these purposes simply consider what I say.