Diverse, massive-star-associated sources for elements heavier than Fe and the roles of neutrinos

Massive-star-associated models for the production of elements heavier than Fe are reviewed in this paper. The important roles of neutrinos in many of these models are discussed, along with uncertainties in the relevant neutrino physics. Data on elemental abundances in metal-poor stars are presented and their constraints on diverse sources for elements heavier than Fe are emphasized.