The Science of The Multiverse In Modern Comics

The concept of a multiverse is not uncommon in science fiction or comic books. The very idea that we exist in some other dimension as ourselves but because we went left instead of right one day, the version of ourselves could be strikingly different. 

This concept is not just all comic book fantasy. There is real science to it.  There are two articles below. One is a break down of the multiverse in comic books and the other is about the actual science behind it.