Though the idea of a multiverse has existed for years — remember evil Spock with the goatee? — the concept is, as the kids say, “having a moment.” Or multiple moments as the case may be. And now they’re having another with the new science fiction short story anthology Multiverses: An Anthology Of Alternate Realities (paperback, Kindle). In the following email interview, Multiverses editor Preston Grassmann discusses what went into assembling this sci-fi collection.