When did heavy metal music begin?
Heavy metal developed in the late 60s and early 70s largely in the United Kingdom.  Part of the British Invasion.
Did Led Zepplin lead the way?
Zeppelin, Black Sabbath and Deep Purple were all founded in 1968
Who was the bass player in Zeppelin?
Led Zeppelin
Led Zeppelin were an English rock band formed in London in 1968. The group consisted of vocalist Robert Plant, guitarist Jimmy Page, bassist/keyboardist John Paul Jones and drummer John Bonham. Along with Black Sabbath and Deep Purple, the band's heavy, guitar-driven sound has led them to be cited as one of the originators of heavy metal. Their style drew from a wide variety of influences, including blues, psychedelia and folk music.
After changing their name from the New Yardbirds, Led
List of heavy metal festivals
This is an incomplete list of heavy metal festivals. Heavy metal (or simply metal) is a genre of rock music that developed in the late 1960s and early 1970s, largely in the United States and the United Kingdom. With roots in blues rock and psychedelic rock, the first heavy metal bands such as Led Zeppelin, Black Sabbath and Deep Purple attracted large audiences, and during the late 1960s and mid-1970s these band and others in their genre were featured at a number of historic rock festivals