If life was on Mars, it seems a bigger problem for evolutionists and bibleists than creationists.
You just randomly pulled that out your ...., didn't you?
Then again, you're probably right. Evolutionists actually study the phenomenal world, so every new discovery provides additional fields of inquiry. Biblical literalists have enough problems as it is from an empirical standpoint, so this would just be yet one more nail. As for creationists, they just make it up as they go along.
Sorry for my earlier snark!
I don't know what a "bibleist" is, or in what manner that "they" differ from creationists. As far as evolution goes, life on Mars would not be a problem at all. Quite the opposite. I don't know where you got that from.
It would be utterly fascinating, especially on the genetic level. Is their DNA related to ours? Do they even use DNA? How do they reproduce? What do they eat? How do they breathe? It would be a truly major discovery, and would have absolutely have no negative effect on the Theory of Evolution whatsoever.