World's lightest material
Researchers from The University of Irvine and The California Institute of Technology have created material that is 100 times lighter than styrofoam.
The material is made from 99.99% air and tiny hollow metallic tubes with walls 1,000 times thinner than a single strand of human hair.
It is strong enough to bounce back to 98% of its original shape, after being compressed to half its size.
This material could be useful for battery electrodes or inside materials that require acoustic, vibration or shock energy absorption.