 Teuku argued these characteristics correspond to the Australo-Melanesian population proposed by Koenigswald that predated the East Asian immigrants of the Neolithic; also suggesting the initial inhabitants were likely forced south of Southeast Asia's mainland by the second wave of migrants, due to resource competition or conflict.Excavations at Moh Khiew Cave resulted in the discovery of a Late Pleistocene female human skeleton, an AMS radiocarbon date on a charcoal sample that was gathered from the burial grave gave an age of 25,800 +/- 600 BP.Measurements such as the bimaxillary breadth, upper facial height, bicondylar breadth, mandibular length, nasal breadth and height, palatal height, and mandibular angle were compared from the cranial and dental area to other female human specimens from East Asia and the Southwest Pacific regions.