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The study of animal remains, especially bones, from archaeological contexts, including the identification and analysis of faunal species as an aid to reconstructing human diets, determining the impact of animals on past economies, and in understanding the environment at the time of deposition. Animal remains are collected, cleaned, sorted, identified, and measured for their study and interpretation. The study of bones involves calculations of minimum numbers of individuals belonging to each species found; their size, age, sex, stature, dentition, and whether the bones have any marks from implements implying butchering and eating. Archaeologists attempt to answer questions such as how many species of domesticated animals there were, how far wild animals were exploited, how many very young animals there were to determine kill patterns and climate changes, in what way bones were butchered, what the sex ratios there were in determining breeding strategies, and if there were any animals of unusual size. By analyzing remains from different parts of a site it may be possible to understand some of the internal organization of the settlement, while a comparison between sites within a region may show areas of specialization.