It looks like glass.

• Position: Science Scene - Silica aerogels - Brief Article

It looks like glass and feels like solidified smoke, but the must interesting features of the new silica aerogels made by Lawrence Livermore (Calif.) National Laboratory researchers are too small to see or feel. Lighter than styrofoam, this material is riddled with pores just nanometers in size, saving it 98% empty. Water can soak into it. but in the confined...