Aerogel, developed in the 1930s, is 99.9%
air and 0.1% silica dioxide. It's often referred to as "frozen smoke" due to its
phantom-like appearance. Its incredibly large internal surface area means that a
sugar cube size volume of the stuff would "unfold" to fill the area of a football
field. Aerogel can support tremendous weight for its mass and provides 39 times
the insulation rating as fiberglass. It is so fragile that it has to be handled
with gloves to avoid permanent fingerprinting.