It weighs less than air and is extremely strong, yet flexible enough to bounce back to its original shape, after being compressed. And, it does not float away either, because a 10cm×10cm×10cm cube does not displace 1000 cubic centimeters of air, since a lot of air stays in the pores of the 'sponge'. But best of all, it can absorb up to 250-500 times its own weight of oil at a rapid pace of 68.8 grams per second. This is not a material scientist's dream, but a description of the most recent 'lightest' solid created by a research team from China's Zheijang University.