Why do physicists believe there are universes besides our own? I get a lot of questions about the idea that we live in this “multiverse”. Is it science, religion, pseudoscience, or just wrong? That’s ...

The five recognized multiverse levels range from alternate Earths within our cosmic horizon to universes outside our space and time that defy known physics.

Somewhere in the vastness of the cosmos, there are planets resembling Earth. And on these planets live other versions of you, who have made radically different life choices. So says the theory of the ...

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 ...