Aerogel is cool !

Whoa look at this stuff: It's a solid but it's lighter then air. It was developed for a space mission to collect particles of dust from a deep space comet. It also protects these crayons from the heat. it feels like styrofoam to touch but it is very tough. Here is a pic of Aerogel holding up a Brick Wonder what would happen if you touched it? "Silica aerogel is semi-elastic because it returns to its original form if slightly deformed. If further deformed, a dimple will be created. However, if the elastic limit is exceeded, it will shatter catastrophically, like glass." Check out the Jet Propulsion Laboratories here