Word: silica
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...Earth's. Opportunity discovered deposits of BB-sized pellets - which NASA nicknamed blueberries - that are rich in hematite, a mineral that forms only in watery environments. And by pure serendipity, in 2007 a balky wheel on Spirit dug a shallow trench in the ground, revealing the presence of white silica, another indicator of water. So far, neither rover has uncovered hard evidence of life, but by no means have they ruled it out either...
...even breakdowns can pay dividends. In May 2007, scientists announced the discovery of white silica beneath the Martian soil--a telltale mineral that usually forms in the presence of water--one more bit of proof that Mars was once a wet place. The silica would never have been discovered if Spirit's balky wheel hadn't dug a trench in the soil...
...Silica-fiber compound...
...Mexican glass tiles (tel: [1-800] 888-6100; www.grandwailea.com). Exotic pools are not just the domain of warmer climes: 40 minutes outside of Reykjavik, Iceland, is the year-round, 39°C heat at the Blue Lagoon. Pumped from a geothermal source, it comes complete with silica mud for a do-it-yourself facial (tel: [354] 420 8800; www.bluelagoon.is). All in all, they sure beat those childhood swimming lessons at the local pool...
...NEUTRALIZE THE SPORES Chemicals such as bentonite or silica are added to remove the electrostatic charge and allow the tiny particles to float...