Scientists at the University of California in Berkeley have developed, on a nano scale, a material that can bend light around 3D objects theoretically rendering them invisible. According to a BBC article "The new system works like water flowing around a rock, the researchers said.Because light is not absorbed or reflected by the object, a person only sees the light from behind it - rendering the object invisible. The new material produces has "negative refractive" properties. It has a multi-layered "fishnet" structure which is transparent over a wide range of light wavelengths." The research is of course being funded by the US government and if reproducable on a large scale could have many military and covert applications. This conjures up images of the Predator movies...
