Grunge came about in the late 80's early 90's. Charactarized by people in flannel shirts and torn up jeans. it originated in seattle washington. some may say that the arists were a bunch of teenagers affected by the bad climate in seattle. Grunge is has a sound that sets it aside from the rest. The guitar typicaly has a dirty "mest up" distortion, heavy feed back and useally tuneing is a little off or tuned to D (DADGBE). Drumming has a steady beat mostly influenced by metal drum beats, untill NIRVANA where the beats were more popish. bass was usally alot like punk folled the guitar useing the beat of the drum. although grunge is conciderd to be a product of punk and metal, it developed its own melodic sound. The first real grunge band was Green River. and many more came about during the late 80's/90's. ex. Mudhoney, The Pixies, Sonic Youth, NIRVANA, Stone Roses, Alice In Chains, Sound Garden, Temple of the Dog, L7, Smashin Pumpkins, Hole, Pearl Jam, Candlebox, Live, Collective Soul, Malfunkshun.. etc. Grunge reached its mainstream popularity which NIRVANA, Nirvana released theyr first Album in 1989 "Bleach" on 12" which didnt make it main stream. In 1991 Nevermind was realesed. it was estimated to sell only 500,000 copys, a surprise to the band it went on to sell over 10 million copys, in the U.S. alone. Grunge became populrized and bands from then on have tryed to recreate such a success. Many popular rock bands today have elements of grunge. Grunge is called grunge cause of the dirty sound.. and sometime the artists look dirty. ;-)
Grunge did not die with Kurt Cobain, it only faded away, to be brought back another day.