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) Notes from the Underground (Hollywood Undead album) Notes from the Underground is the third studio album by American rap rock band Hollywood Undead. Originally set to release in Summer 2012, "Notes from the Underground" was released on January 8, 2013 in the United States and Canada. The album charted at No. 2 on the Billboard 200 with over 53,000 copies sold in its first week, making it their highest charting album to date, despite its predecessor "American Tragedy" selling around 67,000 copies in its first week. The album has spawned a generally positive reception. Following extensive touring throughout 2011 to