Aerogels are the world’s lowest-density solid materials,
composed of up to 99.98% air by volume but also highly
porous and extremely rigid, capable of bearing weight many
times their own. Aerogels are a diverse class of amazing
materials with advanced properties. Transparent superinsulating
silica aerogels exhibit the lowest thermal conductivity of any
solid known. Ultrastrong, bendable x-aerogels are the lowestdensity
structural materials