Hints of a mirror cosmos have a way of gripping the imagination, and recent chatter about “first proof” of a parallel ...

Sci-fi loves parallel universes. But could we really be in one? When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Parallel universes are no longer ...

Physicists probing the origins of the cosmos hope that next year they will turn up the first proofs of the existence of concepts long dear to science-fiction writers such as hidden worlds and extra ...