A supreme being and it always existing is my main two. Obviously, i doubt man made "Creators" but not the idea itself. My reasons why are another thread.
Could we be an alien experiment? I think its just as possible as any other guess. Then again, we could be the first intelligent life in the universe. I dont think too many people even consider that..
I agree with all of this...except the part of us being the 1st intelligent life........seems improbable just because of the age and size.
1 thing I've seperated in my thoughts - is existence itself versus the existence of THIS universe....
So, if Aliens made us ~ or, if we're in some Computer model......the answer of where ultimate "existence" came from is left unanswered.
As to a super being, thats one of the many possibilities and it faces the same limitations as any other......like how "itself" came to be.