The highest-rated episode of this Cartoon Network animated series explored a popular sci-fi concept years before the Marvel ...

Pick up any science fiction book from the 1960s, and you’ll find parallel dimensions explained through magic portals or mysterious machines that work “just because.” Today’s readers want stories that ...

Dark Matter introduces viewers to a mind-bending way of multiverse travel involving a mysterious box. But even by the end of the series, people are left with multiple questions about how the box works ...