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

Are parallel universes just a wild theory or something more? In this deep dive, we explore multiverse theory, its many interpretations, and whether we can ever truly know what lies beyond our universe ...

This idea that our universe is not the only existing universe has been an electrifying philosophy simmering in people’s minds for decades. Well, the multiverse theory puts into describing other ...

There may be another universe just a millimeter away from ours, hovering in an extra, hidden dimension. At any moment this second universe (or “membrane,” in M-theory—a relative of superstring theory) ...

The universe is a strange, beautiful place—rich with possibilities and governed by the odd rules of quantum mechanics. One of the most mind-bending ideas from this realm is the many-worlds ...

It’s one quantum leap for mankind. Parallel dimensions are no longer restricted to Marvel flicks. Google’s cutting-edge quantum chip Willow has prompted discussions among scientists about the ...

Multiple universes and parallel worlds are all the rage in film and TV these days from the Marvel cinematic universe toStranger Things. But multiverses are more than just fiction, many scientists are ...

Below, Halpern shares five key insights from his new book, The Allure of the Multiverse: Extra Dimensions, Other Worlds, and Parallel Universes. Listen to the audio version—read by Halpern himself—in ...

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 ...