Grindcore is a subgenre of heavy metal music that combines elements of hardcore punk and extreme metal. It is characterized by its fast tempos, aggressive guitar riffs, and intense drumming, often featuring blast beats. The lyrics typically address social and political issues, as well as themes of violence and existentialism. The genre emerged in the mid-1980s, with bands like Napalm Death and Carcass leading the way. Grindcore songs are usually very short, often lasting less than a minute, and the vocal style can include growls, screams, and shrieks. This unique sound has influenced various other genres and continues to have a dedicated fanbase.