3-D

A holographic display based on a new material can be repeatedly written to and erased. Rewritable holograms have been possible at small sizes, such as for holographic memory devices. But it's been difficult to make these materials at a scale large enough for displays. The new material, developed by researchers at the University of Arizona and at Nitto Denko Technical Corporation, in Oceanside, CA, could eventually allow for life-sized displays of people and objects the size of cars that could be refreshed every few minutes.