We mourn the loss of our beloved friend and colleague, Dennis Stanford, Curator of North American Archaeology and Director of the Paleoindian Program. Dennis joined the Department of Anthropology in 1972, launching a 47-year career at the museum. He became one of the best-known archaeologists in North America, with a gift for communicating research to both scholarly and public audiences. At a time when Paleoindian archaeology was still in its formative stages, Dennis helped advance the field through his studies of lithic materials, especially the distinctive stone tools known as Clovis points. The last few decades of his research focused on the origins of the first inhabitants of North America, along with human adaptations to the changing environment as the last Ice Age was ending. During his career Dennis authored 136 publications, including several books. "Across Atlantic Ice," which described his theory for an Atlantic route taken by the earliest Americans, was his most recent book.