According to comic book nerds, there are many universes in which their beloved characters live. For example, there are lots of Supermen living in different worlds simultaneously. Of course, in many of these realities, Superman is from the planet Crouton, which is doomed, so his parents ship him to planet Earth. Even though Superman is supposed to be the last of his kind, a cousin of his happens to show up in two of these realities. His cousin is Power Girl/Supergirl. They’re both blondes, scantily clad, and can fly. Fanboys will insist that they’re different, other than their costumes. Yes, there is a big difference – two of them actually. Power Girl’s breasts are way bigger than Supergirl’s.