Anthropology is the study of humans, past and present. It is divided into four main subfields: physical/biological anthropology which studies human evolution and biology; cultural anthropology which includes archaeology, linguistics, and ethnology to understand human cultures and societies; linguistics which examines the structure and development of human languages; and applied anthropology which uses anthropological knowledge and methods to analyze and address real-world problems. Anthropologists seek to understand humans as a whole through interdisciplinary and holistic research on our biology, behaviors, beliefs, and environments over time and across cultures.