The scientific study which deals with humans and human behavior, as well as their societies, is known as anthropology. Major branches of anthropology include social, cultural, linguistic and biological anthropology. Social anthropology observes the patterns of behavior, while cultural anthropology studies cultural norms and values. Linguistic anthropology includes the study of languages and how they influence social life. Biological anthropology is the branch of anthropology that focuses on the biological, evolutionary and demographic study of humans and non-human primates. It also examines the biological and social factors that influence the evolution of humans and other primates.