Nirvana did what all great bands do: they made everyone else catch up. Mainstream radio accommodated alternative music's idiosyncracies, in the case of Nirvana the confrontation of Cobain's distorted guitar, vocal roughness, sonic dissonance, and deliberately nonsensical lyrics. Whatever one's view of Cobain, it is undeniable that he set pop music on a new course.
Twenty years ago, Nirvana released "In Utero," their most controversial and, sadly, final studio album. After the unlikely