Anthropology's central aims are to describe, interpret, and make meaningful human behavior in socio-cultural systems. It also seeks to explain the similarities and differences in human behavior patterns among all peoples and cultures, both in the present and the past. Social-cultural anthropology studies human society in the present, using participant-observation, interviewing, and other techniques to understand life in a single culture, a subculture, or a multicultural system. Archaeology explores deep human history and attempts to document and understand the range of cultural patterns practiced by peoples no longer living. Archaeology accomplishes this through methods unique to the field and with techniques borrowed from other disciplines. These goals make archaeology an important part of the anthropological family of special skills and interests.