Theoretical physicist Michio Kaku talked about the multiverse at the last IdeaFestival. But in thanking a recent speaker at an Amsterdam event, Inspire! reminded me that we are already, in a sense, exploring many worlds:
Joseph Pine... talked 1 hour about theemerging Multiverse. The multiverse comprises of eight different (physical/virtual) worlds: Physical Reality, Augmented Reality, Augmented Virtuality, Virtual Worlds, Mirror Worlds (Google Earth), Warped Reality, Alternate Reality (Games/ARGs) and Physical Virtuality (3D printers).