"i've done an interview with melody maker back in the 70s and they said our band was playing heavy metal. i said we were heavy rock, we call it heavy rock, you call it heavy metal. i wouldn't accept the heavy metal thing for years and, eventually, you have to." tony iommi from black sabbath - feb 2020.

young british musicians in the early 70s are looking for a darker and heavier way to rock. and, as tony said, they just invent something huge without even knowing it.

• heavy metal progenitors:

black sabbath, judas priest, dio.

• important progenitor album:

black sabbath - paranoid (1970).