Aerogel that you can buy! [www.unitednuclear.com]

For those who have no idea what I'm raving about, Aerogel is composed of 99.8% air - it's density is just 3 milligrams per cubic centimeter and weighs only three times that of air. Aerogel can support thousands of times its own weight and its melting point is 2,200 degrees F (1,200 degrees C).

It's just plain cool. Or hot, depending on how you look at it.