Breakthrough: This metal is almost as light as air (video)
Tim Barribeau
io9
November 17, 2011
Ultra-lightweight materials are an incredibly cool area of materials science, bringing us crazy substances like aerogel. And now, for the first time, scientists have produced a metal that’s so light it can balance on the fluff of a dandelion. Here’s why this material is revolutionary — and how it’s made.
PN 
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