This creates a nanofoam, a foam with most of its bubbles under 100 nanometres in size, giving the aerogel its unusual properties: Silica aerogel is the lowest-density solid yet created, actually lighter than air when in a vacuum (outside of a vacuum, air fills the pores, upping its density to slightly greater than air). Vanished user talk 18:48, 26 August 2007 (UTC) Proposed caption Peter Tsou of NASA's Jet Propulsion Laboratory holding a sample of aerogel - an extremely lightweight substance created by replacing all the liquid in a gel - usually silica gel - with gas, by means of supercritical drying, a process similar to freeze-drying.
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This is one of my favourite science images, and I think well-deserving of an FP. Original Reason This is a little undersize for a normal FP, I know, however, Aerogels are not available in any quantities outside of NASA, the Jet Propulsion Laboratory, and related agencies, so the image is essentially irreplaceable. 78 The smoke from burning moss generated by the advancing lava flow.
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22 Wawadit'la(Mungo Martin House) a Kwakwaka'wakw big house.14 Field Marshall Keitel signs the German Act of Unconditional Surrender.Purge page cache if nominations haven't updated. January - February - March - April - May - June - July - August - September - October - November - December