What do you mean by Parallel Universe ?​

Parallel universe, or alternate reality, is a hypothetical self-contained plane of existence, co-existing with one's own

first thing first of the answer is with technology. second thing second thing is that the big bang theory did not happened u see they say it did but what they dont realize is that like dinasures are still a round they might deny it but they and look at these 12 foot human skelteons they find lets see didnt the bible say something about giants. hope this peace.