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

If true, the idea would blow past one of physics’ most sacred limits: that parallel versions of reality can never talk to ...

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 ...

Apple TV's sci-fi thriller Dark Matter stars Joel Edgerton in a captivating dual role, offering a refreshing take on ...