Aerogel

Aerogel is basically “a low-density solid-state material derived from gel in which the liquid component of the gel has been replaced with gas.” Video after the break. Click here for first picture in gallery.

It has been used by NASA as insulation for the Mars Pathfinder Rover. Not only is it a great insulator, but it is also made from silicon dioxide, so it can do other glass-like activities.

[via CrunchgearWellsjWiki]