Here is search logs of 650,000 AOL users. It's very interesting to view search history of particular person and analyze his personality. Let's do it together! Read more about AOL search database scandal or view research papers on web searching.
perlite
Perlite is an amorphous volcanic glass that has a relatively high water content, typically forme by the hydration of obsidian. It occurs naturally and has the unusual property of greatly expanding when heated sufficiently.