Hot dry rock geothermal energy makes use of hot fluids found naturally in basement rock; but such HWR conditions are rare. By far the bulk of the world’s geothermal resource base (over 98%) is in the form of basement rock that is hot but dry—with no naturally available water. This means that HDR technology is applicable almost everywhere on earth (hence the claim that HDR geothermal energy is ubiquitous). Typically, the temperature in those vast regions of the accessible crystalline basement rock increases with depth. This geothermal gradient, which is the principal HDR resource variable, ranges from less than 20 °C/km to over 60 °C/km,
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