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Forensic anthropology training. Shallow grave containing two skeletons excavated by forensics trainees in a body farm at the University of Tennessee Forensic Anthropology Facility, Knoxville, Tennessee, USA. This body farm facility was founded by anthropologist Dr. William M. Bass in 1971. It is used to assist the trainees in the study of human decomposition. In this staged crime scene, donated bodies have been left for the trainees to uncover after following the clues laid out by the instructors. (KEYSTONE/SCIENCE PHOTO LIBRARY/PETER MENZEL/SCIENCE PHOTO LIBRARY)