Metal.evolution.s01.complete.720p.amzn.webrip.x... -

The documentary series begins by examining the roots of metal, tracing its origins back to the late 1960s and early 1970s. Bands like Black Sabbath, Led Zeppelin, and Deep Purple are credited with laying the groundwork for the genre. Their heavy, distorted guitar riffs and powerful vocals set the stage for what would become a defining characteristic of metal music.