An invisibility cloak under development at Duke University is a new and improved version of one announced in 2006 by the same researchers. This latest version, developed by Scientists at Duke's Pratt School of Engineering, solves some of the problems the earlier one had with reflections of light. The previous device, which used parallel and intersecting strips of fiberglass etched with copper, reflected light along the edges and corners of the material and left a vague image.
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