Chinese researchers have been busy inventing some of the coolest stuff you couldn't even imagine. Graphene aerogel weighs just 0.16 milligrams — or, if you’re having a problem conceptualizing that, a cubic meter weighs just 160 grams (5.6 ounces) (from here). This material is light, spongey, and has the potential to do a world of good. Imagine a huge oil spill occurs in the middle of the ocean. Now we may have just the material to drop, absorb, and lastly, reclaim the natural resource/pollutant. Scientists are still developing the material more and thinking of uses.