Who knows about the multiverse? The multiverse is the set of possible universes, including the universe in which we live. These universes comprise everything that exists: the entirety of space, time, matter, energy, and the physical laws and constants that describe them.
The various universes within the multiverse are called "parallel universes", "other universes" in DC Comics they go into a lot about the multiverse.It is how they can have all their Heros able to exsist at the same time and not interfear with each other. On Earth 1 Barry Allen is The Flash and on Earth 3 Jay Garrick is The Flash. However Barry Allen still exsists on Earth 3 but only as a CSI or maybe on another earth as baseball player. you get the point. If you are into cool shit like this then look into it. Watch all the new DC Comics T.V series's. They make the best use of this theory. Also just great for nerding out. Your favorite SEXY NERD 
