Hot dry rock geothermal energy Hot dry rock geothermal energy Hot dry rock (HDR) is an abundant source of geothermal energy available for use. A vast store of thermal energy is contained within hot - but essentially dry - impervious crystalline basement rocks found almost everywhere deep beneath the earth’s surface. A concept for the extraction of useful amounts of geothermal energy from HDR originated at the Los Alamos National Laboratory in 1970, and Laboratory researchers were awarded a U.S. patent covering it. Although often confused with the relatively limited hydrothermal resource already commercialized to a large extent, HDR geothermal energy is very different. Whereas
Guitar Hero Encore: Rocks the 80s Court judge stating that Activision had obtained the proper licensing for the works and that the band itself no longer held the copyright on the work. Guitar Hero Encore: Rocks the 80s Guitar Hero Encore: Rocks the 80s (titled Guitar Hero: Rocks the 80s in Europe) is a music rhythm game and the third installment in the popular "Guitar Hero" series. It was released in July 2007 in North America and Europe, and in August 2007 in Australia. Players use a guitar-shaped controller (purchased separately) to simulate playing rock music by hitting notes as they scroll towards the player. "Rocks