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

Scientists have long pondered on one of the universe's greatest mysteries: Are we alone? They have searched the cosmos, but so far, there has been no sign of extraterrestrial life. Is it possible that ...

Scientists have come up with theories about parallel universes that are so wild they’d make the most creative science fiction writers feel jealous. The idea that there are other worlds exactly like ...