Yegan is a postdoctoral scholar in the Ross lab. She is a biological anthropologist interested in understanding how morphology represents a compromise between function and phylogenetic constraints. Yegan is also interested in comparative biomechanics of locomotor and feeding systems to understand the mechanisms that drive the evolution of these systems. For her dissertation, she examined the evolutionary patterns and selective histories that have shaped human foot evolution. For her postdoctoral work, she studies the feeding system by creating biomechanical modeling of the tongue to test hypotheses about the roles of intrinsic and extrinsic tongue muscles.