People, plants, and animals travel; so do theories, ideas, and concepts. Concepts migrate across disciplines—from the sciences to the humanities and back—oft en repurposed to theorize new objects in new contexts. Many terms span species and disciplines, from human contexts in ethnic studies, post/colonial studies to scientific/biological terminology: native, alien, local, foreign, colonizer, colonized, naturalized, pioneer, refugee, founder, resident. In this article, I explore concepts around mobility and “migration” and how the values and political contexts accompanying these concepts circulate across geopolitical and scientific terrains. In extending theories of migration to examining the history of science, I explore the migrations and diasporic lives of concepts.