Researchers have made a material which is so light it's 99.99% air.
The material has a density of less than 0.2 mg per cubic centimetre - which is about 400 times lighter than styrofoam.
To hold it, the aerographite looks like a black sponge, says New Scientist - though you'd hardly know it was there.
It can also be compressed by 1,000 times before springing back to its original shape, and can support much more weight than competitors like aerogel. According to Phys.org it can actually support up to 40,000 times its own weight.y
Amazingly, it can also conduct electricity, meaning it could be used in batteries or other technology. It is also reportedly resistant to chemical attack.
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