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
Echoes from the Underground Echoes from the Underground Echoes from the Underground is the sixth studio album from the band Vertical Horizon, released on October 8, 2013. "Broken Over You" was released as the lead single. Rush drummer Neil Peart played the drums on two songs on the album, including "Instamatic". After the band's 2009 album, "Burning the Days", band co-founder Keith Kane left the band shortly after in 2010, to pursue solo projects. The band's other co-founder, and frontman Matt Scannell turned to crowdfunding to financially support the creation of the album. Supporters who put down money ahead of time were allowed first