Theoretical physicist Michio Kaku supports the concept of parallel universes, but he says people shouldn’t get their hopes up about meeting their doppelganger in another dimension, like Marvel ...

Wonder Woman teams up with Terruna to fight the evil Duke Dazam before returning to her own universe. This issue marks the first of many parallel-world adventures in comic books and cartoons.

Caltech theoretical physicist Sean Carroll stopped by Business Insider to talk about string theory, parallel universes, and other exciting topics he discusses in his new book, "The Big Picture ...