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Aerogel

Submitted by bill on Wed, 2006-03-22 12:24.

Aerogel is the lightest and lowest-density solid known to exist; it weighs only three times that of air. It holds 15 entries in the Guinness Book of World Records, including best insulator. It is 99.8% air, yet is incredibly strong structurally, and can support thousands of times its own weight.

Aerogel is used in various capacities by NASA.

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