Soundgarden carved out a place for heavy metal in alternative rock. They were not the first band to draw upon the heavy, sludgy sounds of the '70s; the group picked up a thread left hanging by fellow Seattle rockers Green River, grunge pioneers who favoured the scuzzy rock of the Stooges, and they shared Jane's Addiction's love of grandiose heavy rock. Nevertheless, Soundgarden popularized metal within alternative rock, even obliterated the line separating the two subcultures. Melding the slow grind of Black Sabbath and cinematic scope of Led Zeppelin with the D.I.Y. aesthetics of punk, Soundgarden played with an intelligence and ironic sense of humour that was indebted to the American underground of the mid-'80s.