What does one of the world's leading quantum physicists have to say about parallel universes and time travel? In this video, Michio Kaku takes on the topic in his dynamic and engaging style. As he writes in his new book, "Physics of the Impossible," the technologies of science fiction and fantasy - invisibility, teleportation, precognition, star ships, antimatter engines, time travel and more — all regarded as things that are not possible today, might be very possible in the future.