appearance of ancient peoples Although students of Gerasimov later used his techniques to aid in criminal investigations, it was Wilton M. Krogman who popularized facial reconstruction's application to the forensic field. Krogman presented his method for facial reconstruction in his 1962 book, detailing his method for approximation. Others who helped popularize three-dimensional facial reconstruction include Cherry (1977), Angel (1977), Gatliff (1984), Snow (1979), and Iscan (1986). In 2004 it was for Dr. Andrew Nelson of the University of Western Ontario, Department of Anthropology that noted Canadian artist Christian Corbet created the first forensic facial reconstruction of an approximately 2,200-year-old mummy based on CT and laser scans. This reconstruction is known as the Sulman Mummy project. Technique for creating a three-dimensional clay reconstruction Because a standard method for creating three-dimensional forensic facial reconstructions has not been widely agreed upon, multiple methods and techniques are used. The process detailed below reflects the method presented by Taylor and Angel from their chapter in Craniofacial Identification in Forensic Medicine, pgs 177–185. This method assumes that the sex, age, and race of the remains to undergo facial reconstruction have already been determined through traditional forensic anthropological techniques. The skull is the basis of facial reconstruction; however, other physical remains that are sometimes available often prove to be valuable. Occasionally, remnants of soft tissue are found on a set of remains. Through close inspection, the forensic artist can easily approximate the thickness of the soft tissue over the remaining areas of the skull based on the presence of these tissues. This eliminates one of the most difficult aspects of reconstruction, the estimation of tissue thickness. Additionally, any other bodily or physical evidence found in association with remains (e.g. jewelry, hair, glasses, etc.) are vital to the final stages of reconstruction because they directly reflect the appearance of the individual in question. Most commonly, however, only the bony skull and minimal or no other soft tissues are present on the remains presented to forensic artists. In this case, a thorough examination of the skull is completed. This examination focuses on, but is not limited to, the identification of any bony pathologies or unusual landmarks, ruggedness of muscle attachments, profile of the mandible, symmetry of the nasal bones, dentition, and wear of the occlusal surfaces. All of these features have an effect on the appearance of an individual's face. Once the examination is complete, the skull is cleaned