Researchers have created a material which they call “Aerographite”, that looks like a wisp of smoke, but this is actually the lightest 
material that has ever been created.
Aerogel, was the lightest material in 2006 which was used by NASA to collect dust from a comet and is 99.9 per cent air with a density of just 1 milligram per centimetre cubed. That too was recently beaten by the metallic microlattice, which has a density 0.9 mg/cm³. This metallic material was also nearly 1,000 times thinner than a human hair.
Now there is Aerographite, which broke the previous record. With a density of less than 0.2 mg/cm³. Researchers at the Hamburg University of Technology and the University of Kiel, both in Germany, made it from a network of hollow carbon tubes grown at nano and micro scales. It is mostly empty space, though if you try to hold it in your hands, it would look like a black sponge.
Due to its ability to conduct electricity it can be a used as part of an ultra-lightweight battery.
