NASA’s ‘frozen smoke’ named lightest solid

imageCooked up in a NASA laboratory, a gel that is 99.8 percent air has been designated the least dense solid in the world by Guinness World Records.

Aerogel, one of the world’s lightest solids, can withstand a direct blast of 1kg of dynamite and protect against heat from a blowtorch at more than 1,300C.

The substance, described as “frozen smoke” for its hazy blue appearance, is a new variety of a silicon-based material designed to collect particles in deep space.

http://archives.cnn.com/2002/TECH/space/05/09/record.gel/

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