0_Apprentice
When did heavy metal music begin?
1_Wizard
Heavy metal developed in the late 60s and early 70s largely in the United Kingdom.  Part of the British Invasion.
0_Apprentice
Did Led Zepplin lead the way?
1_Wizard
Zeppelin, Black Sabbath and Deep Purple were all founded in 1968
0_Apprentice
Who was the bass player in Zeppelin?
1_Wizard
The bassist was Robert Plant.  Keyboardist John Paul Jones.
0_Apprentice
He also sang most of the songs, right?