The two heavy bands bring their co-headlining tour to Globe Iron. For 40 years now, Napalm Death has blended grindcore, crust punk and death metal. Not be outdone, the proto-grunge Melvins have delivered album after album of heavy, Sabbath-inspired tunes. The concert begins at 6:30 p.m. Tita to Tachyons and Dark Sky Burial open.