Facial approximation of a Late Pleistocene human fossil in the Yahuai Cave, southern China

Abstract

An almost complete human cranium, alongside a partial mandible dating to approximately 16,000 BP, was discovered in the Yahuai (YH) Cave in the Guangxi Zhuang Autonomous Region, southern China. The estimation of facial appearance has captivated both the academic community and the general public, potentially influencing perceptions of the characteristics and evolutionary history of Homo sapiens. The aim of this research was to explore a computerized method integrating geometric morphometrics and three-dimensional (3D) computer graphics to: 1) examine the morphological variations of the YH skull in comparison to contemporary humans; 2) estimate 3D facial appearance using various facial soft tissue thickness depths and the facial morphology of contemporary humans; and 3) capture morphological variations in the approximated face to provide insights into the facial traits of the Late Pleistocene individual. The results indicate that the YH skull is relatively distinct from contemporary human skulls, and this is reflected in morphological dissimilarities in the approximated face. We discuss the methods involved in computerized facial approximation, which has the potential to contribute to estimating the facial appearances of other Late Pleistocene human skulls.