Are there alien visotors that appear like us that mix amongst us,inour world on earth and civilization, that are not the same species, genetically.And are there some that are incarnated in our own genetic kind, if this is possible?And whether or not they work for another system or us or what would be the reason.?
I do not know.
Another question is it possible for life to evolve from one panet/star system to another or from one planet to another in the same system , particularly higher life forms.
Or is a life form trapped in its system, to end its evolution there.?
My view is that evolution have a beggining and an end.