Black Holes and Revelations is the fourth studio album by the British rock band Muse and originally appeared in 2006. The band broadened its sound with influences from electronic music, glam rock and Italo disco, while lyrics about politics, power and the cosmos recur. Well-known songs include "Supermassive Black Hole", "Starlight", "Knights of Cydonia" and "Map of the Problematique". The album marked an international breakthrough and cemented the group's reputation as an arena band.