] This guy here is Peter Tsou. He's a scientist at NASA's
] Jet Propulsion Laboratory, and he's holding an amazing
] substance called aerogel. Aerogel is a solid, but it is
] 99.8% empty space. In fact, it very closely approaches
] the density of air. It practically IS air. It's still a
] solid, though, and you can even pick it up or set things
] on it.

Very neat.

Hinterlands.cc - 03/26/04: Aerogel