- last post: 01.01.0001 12:00 AM PDT
i like the alternate dimensions theories, because i don't believe that time travel is possible at all. I think that if we ever discover something similar, it will in fact simply be a doorway into an alternate reality which is however many years we tried to go back behind ours.
You can't change the past, because the ripples could conceivably erase you from existane and stop you going back in time, which would create a paradox, causing the entire universe to collapse in on itself.