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The 'Lightest Metal Ever' Is 100 Times Lighter Than Styrofoam

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HRL Laboratories, a subsidiary of Boeing, developed this "microlattice metal," which they say is the world's lightest metal, 100 times lighter than styrofoam. One of the researchers describes it by comparing it to the inside of human bones, explaining that the entire structure is 99.9 percent air. However, it's still resilient against compression, and could be implemented to help make airplanes much lighter, or in a variety of other ways.
· Microlattice metal is "world's lightest material" says Boeing [Dezeen]