A group of scientists have created a new metallic material that they claim is the lightest in the world–lighter than Styrofoam, aerogels, and even carbon nanotubes. The new material is the result of a collaborative effort between HRL; The California Institute of Technology; and the University of California, Irvine. The material’s lightness comes from its extremely low density of 0.9 milligrams per cubic centimeter (mg/cc), which makes carbon nanotubes seem heavyset at 1.3-mg/cc. Click here for more details on the story.