Anthropology is a broad and complex social science discipline that includes four distinct subfields as means for studying human beings at all times, in all places and circumstances. Anthropologists study the remains of past cultures through archaeology. Archaeologists recover artifacts and other data by painstakingly excavating sites of past human occupation and looking through the pieces left behind by the people who lived there. Anthropologists study the physical aspects of what it means to be human through biological anthropology. Biological anthropologists study skeletons, DNA, disease, non-human primates and fossil hominids to provide a complete picture of the evolutionary record and the effects of cultural changes like agriculture on the human body. Anthropologists study contemporary human communities through cultural anthropology. Cultural anthropologists typically spend an extended period of time living in a community and writing descriptions of their experience. Anthropologists study the relationships between culture and language through linguistic anthropology. Linguistic anthropologists typically spend time in communities recording language and cultural data and looking for connections between the two sets of data. All of anthropology’s subfields can be brought out of the classroom and into the community through applied anthropology, which seeks to use the knowledge gained through academic research to solve social problems. Some domains of applied anthropology include forensic anthropology, medical anthropology, anthropology of tourism, language revitalization, and even some aspects of public archaeology.