hi, i'm new here. just a random thought. everything in the universe keeps going further away from each other as time goes, which means everything was once at one place until the big bang happened. as far as i know, the universe may not be infinite; there HAS to be a limit to its expansion. if the universe is not infinite and at one day the universe reaches that limit, then two things could happen: either the universe stops expanding or it will come back as one. the question is: is it possible for the universe to come back as one and how can it possibly happen?