The shock waves are still reverberating from BICEP2's bombshell announcement that they've discovered the holy grail of cosmology: the telltale signature of gravitational waves from inflation.
Although we dont know whether parallel universes exist, we know something else about them with certainty: many people instinctively dislike them, and whenever a physicist writes a book about them, the Web erupts with claims that they are unscientific nonsense.
In this excerpt from his new book, Our Mathematical Universe, M.I.T. professor Max Tegmark explores the possibility that math does not just describe the universe, but makes the universe
Why the multiverse, crazy as it sounds, is a solid scientific idea
Not just a staple of science fiction, other universes are a direct implication of cosmological observations
As quantum theory celebrates its 100th birthday, spectacular successes are mixed with persistent puzzles