we are not alone . . . just think about universe how big and far it is .. not just us . .The odds are, given the vast size of the universe, and the infinite number of celestial bodies flying around and infinite number of solar systems, we are not alone.
Yet so far we've not found any.
It's possible that Earth is the first life in the universe, after all it has to began somewhere.
Or we could be the last.
It has been covered, sort of, by the Fermi paradox: