I am broadly interested in anything that has to do with the early evolution of mammals. My research focuses on mammals from the Mesozoic ('Age of Dinosaurs') and earliest Cenozoic ('Age of Mammals'), and I am particularly interested in mammalian lineages that have left no modern descendants (e.g., multituberculates, which are the focus of my dissertation).

To get at the who, what, when, where, and why of early mammal evolution, I use methods in ecology, functional morphology, histology, biomechanics, systematics, sedimentology, stratigraphy, geochemistry, etc.. I am also actively involved in field research, currently focused on the Cretaceous and Paleocene of Montana.