Heavy metal music is a genre that emerged in the late 1960s and early 1970s, characterized by its loud, aggressive sound and powerful guitar riffs. It often features distorted electric guitars, strong rhythms, and emphatic vocals. Bands like Black Sabbath and Led Zeppelin are considered pioneers of this style, which has since evolved into various subgenres, including thrash metal and death metal. Lyrically, heavy metal often explores themes such as fantasy, mythology, and social issues. The genre has a dedicated fan base and is known for its energetic live performances. Festivals like Download Festival and Wacken Open Air celebrate heavy metal culture, showcasing both established and emerging artists.