Dr Michio Kaku draws up blueprints for a working time machine that will let us visit the past and travel back to the future.

Dr Michio Kaku is on a quest to build a spacecraft that can travel across the universe; he wants to prove to the world that it is not just a sci-fi dream, but can also be a reality.

Dr Michio Kaku investigates the possibilities of creating a real-life lightsaber: using cutting-edge technology, bundled light needs to be transformed into pure energy that can be kept under control.