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POPSCrystal clear? think again "of fast-moving and slow-moving regions in a solidifying glass were seen in experiments, and computer simulations predicted that this pattern, called dynamical heterogeneity, should exist." interesting stuff.. what amazes me, is as one zooms in (and out:) new levels of complexity that were not seen before, are discovered.
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POPSTalc keeps killer quakes at bay Talc is a watery mineral composed of magnesium, silicon and oxygen. But it is not a major component of the earth's crust. But when present in sufficient quantity it can, at sufficiently high temperatures, forestall a dangerous build-up of pressure, say geologists Diane Moore and Michael Rymer from the US Geological Survey. Talc has a hardness rating of 1, the lowest possible, while diamonds have a rating of 10. Talc is held together by weakly-bonded microscopic platelets that slide past one another, giving talc its soft, almost oily feel. The mineral is used in the production of ceramics, paint, paper and a number of building materials, and is also present is some food and pharmaceutical products.
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