Do Parallel Universes really exsit

Answer 1

Ah, a question which science cannot answer yet. In theory's such as quantum mechanic's string theory they do, but string theory is exactly that... A theory. In many ways, it makes sense that a multiverse would exist, due to the fact that if we live in an eternal void with eternal possibilities then it has to be probable that the same conditions which caused the big bang (also a theory) would have occured/are going to occur more than once. However, that doesn't necessarily mean that other universes would share even the slightest similarities with ours. Some could be comprised of purely matter, others could be purely gamma radiation, but some might have followed the exact course of ours.

Unfortunately no one can prove anything just yet, and we won't be able to until we discover the beginning and end of our universe (that's assuming there is a beginning and end). But the evidence thus far is compelling.