Alternative rock music is a genre that emerged in the 1980s and gained popularity in the 1990s. It encompasses a diverse range of styles, often characterized by its departure from mainstream rock. Bands like Nirvana and Radiohead are notable examples, blending elements from punk, post-punk, and indie rock to create unique sounds. The genre is known for its emphasis on artistic expression and often features unconventional song structures and lyrics. Alternative rock has influenced many subgenres, including grunge, emo, and indie pop, making it a significant part of the modern music landscape.