Militaries are likely to be very interested in a new cloaking material capable of making submarines completely ‘invisible’ to detection.

To make an object invisible, one must find a way to overcome the increased distance the light has to travel. To use driving as an analogy, changing one’s speed would solve this problem.

It saved Harry Potter a few times – now scientists have worked out how to make a Cloak of Invisibility. They have invented a material that can be wrapped around an object that makes it invisible ...