Super-Thin Invisibility Cloak Has 'Wide' Military Applications

The military has stealth to hide from radar, but planes, boats and even humvees still leave infrared and magnetic signatures. The problem: all the electrical systems hooked up to all that metal. Recently, a team of researchers in China worked to solve that problem. They are developing what they call a "DC Invisibility Cloak" -- not an invisibility cloak in the traditional sense, but one that can hide electrical and magnetic signals that are given off by direct current. As the charged particles t...