Last week, it was announced that researchers at HRL Laboratories have developed a new material 100 times lighter than styrofoam, consisting of “micro-lattice cellular architecture” that is 99.99% air. Though technically a metal comprised of nanotubes, the material has surprising elasticity—”including complete recovery from compression exceeding 50% strain”http://www.handeyesupply.com/making it ideal for shock absorption, dampening, and whatever else HRL client DARPA can dream up for the stuff.
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