Anthropology is a holistic science dedicated to the study of human cultural and biological diversity. Its five sub-fields are: cultural anthropology, physical anthropology, linguistic anthropology, applied anthropology, and archaeology. Anthropologists study human beings in all times and places from their biological make-up and material cultural adaptations to their institutions, behaviors and understanding about the world. Anthropologists investigate human variation and its biological basis by exploring modern human adaptations, our nonhuman primate relatives and the fossil evidence for human evolution.