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
Notes from the Underground (Hollywood Undead album) 3rd song off of "Notes From The Underground's" "Another Way Out" was the official theme song for WWE's pay-per-view event Payback on June 16, 2013. The music video for "Dead Bite" was released on August 20, 2013. Much of the music on this album remains rooted in hip-hop. Notes from the Underground received generally positive reviews from music critics. Rick Florino of Artistdirect gave "Notes from the Underground" 5 out of 5 stars, noting that it is the best album of 2013 and best album Hollywood Undead has done to date, describing that the album "practically bubbles over with intoxicating,