"World's 'lightest material' unveiled
by US engineers" – BBC

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Dezeen Wire:
a team of engineers based in California have created a material made from a lattice of hollow metallic tubes that they claim is the lightest in the world – BBC

The substance is 100 times lighter than Styrofoam and consists of 99.99% air. Tubes with a wall thickness 1,000 times thinner than a human hair are used to create the lattice structure that gives the material it's strength. Potential applications include shock and sound absorption and thermal insulation.

  • d0ub1ed

    I know a material that is lighter. – Hope.