For nearly 30 years, Earth's Dylan Carlson, its lone constant member, has inhabited a uniquely elastic role in rock. From the very beginning, Earth has been both an exponent of experimental drone-based guitar music and a signature practitioner of the detuned riff inspired by Black Sabbath's Tony Iommi. They remain a singular entity, even though bands such as Sunn 0))) and Boris credit Earth's influence as inseparable from their existences. The only constant in this band's aesthetic is change, an odd point of irony given that their recorded music relies on heavy yet hypnotic fo...