Add Yahoo as a preferred source to see more of our stories on Google. Since ancient times, people have experimented with light, cherishing shiny metals like gold and cutting gemstones to brighten ...

How do you make an object invisible? Professor Sir John Pendry worked out that it involves guiding and bending light in precise ways by changing the structure of the material it is travelling through.

A new research field called transformation optics may usher in a host of radical advances including a cloak of invisibility and ultra-powerful microscopes and computers by harnessing nanotechnology ...