Related Information for Hollow Earth Theory We are The Hollow Earth Theory. A five piece metal band from the West-Midlands, in the United BELOWFinally, a UK band to give the likes of Killswitch Engage and Trivium a run for their money. The Best New Metal Band In Britain!"Metal Hammer"Brilliant and balanced metal. Soaring solos, epic guitar lines with as much growl as melodic singing; as much aggressive chugging as harmonious riffing; as much speed.. read more