Prior to Nirvana, alternative music was consigned to specialty sections of record stores, and major labels considered it to be, at the very most, a tax write-off. After the band's second album, 1991's Nevermind, nothing was ever quite the same, for better and for worse. Nirvana popularized punk, post-punk, and indie rock, unintentionally bringing it into the American mainstream like no other band to date. While their sound was equal parts Black Sabbath (as learned by fellow Washington underground rockers the Melvins) and Cheap ...full biography