Cosmology and quantum physics both offer tantalizing possibilities that we inhabit just one reality among many. But testing ...

(via PBS Space Time) The multiverse pops out of quite a few theories in physics, and has been proposed as a solution to certain vexing problems. But it’s also been argued that the very idea of a ...

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 ...