With a crash of thunder, the ringing of ominous church bells and one of the loudest guitar sounds in history, a heavy new music genre was born in earnest on a Friday the 13th early in 1970. Its roots stretch back to the late Sixties, when artists like Blue Cheer, Iron Butterfly and Led Zeppelin cranked their amps to play bluesy, shit-kicking rockers, but it wasn't until that fateful
This article originally appeared on www.rollingstone.com: The 100 Greatest Metal Albums of All Time