Some of the best science fiction revolves around the notion of a parallel universe: where things are slightly different from the universe you are used to. Popular on Star Trek, a surprising number of scientists have recently become convinced that the theory is grounded in hard science.

Scientists believe that when the universe began, instead of a gravitational pull to keep things together, there was a reverse type of gravitation working and instead repelled everything from it, which has been coined a “false vacuum.” As scientists have proven our world is constantly expanding, this theory seems plausible.

DocumentaryStorm explores with some help from National Geographic!

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