Aerogel, also known as frozen smoke, is the world's lowest density solid, clocking in at about 96% air.

If you hold a small piece in your hand, it's practically impossible to either see or feel, but if you poke it, it's like styrofoam.

It supports up to 4,000 times it's own weight and can widthstand a direct blast from two pounds of dynamite!

It's also the best insulator in existence