Tryon, ChristianCrevecoeur, IsabelleFaith, J. TylerEkshtain, RavidNivens, JoellePatterson, DavidMbua, Emma N.Spoor, Fred2023-02-072015Tryon, Christian A., Isabelle Crevecoeur, J. Tyler Faith, Ravid Ekshtain, Joelle Nivens, David Patterson, Emma N. Mbua, and Fred Spoor. 2015. “Late Pleistocene Age and Archaeological Context for the Hominin Calvaria from GvJm-22 (Lukenya Hill, Kenya).” Proc Natl Acad Sci USA 112 (9) (February 17): 2682–2687. doi:10.1073/pnas.1417909112.0027-8424https://nrs.harvard.edu/URN-3:HUL.INSTREPOS:37374249The KNM-LH 1 Homo sapiens partial calvaria from site GvJm-22 at Lukenya Hill, Kenya, is a securely dated fossil hominin associated with Late Pleistocene-aged Later Stone Age archaeological deposits from eastern Africa, a time and region important for understanding the origins of modern human diversity. A revised chronology based on 26 AMS radiocarbon dates on ostrich eggshell indicates an age range of 23,576-22,887-years before present (yrBP) for KNM-LH 1, confirming prior attribution to the Last Glacial Maximum. Additional dates extend the maximum age for archaeological deposits at GvJm-22 to >46,000 yr BP. These dates are consistent with new analyses identifying both Middle Stone Age and Later Stone Age lithic technologies at the site, making GvJm-22 a rare eastern African record that spans major human behavioral shifts during the Late Pleistocene. Comparative morphometric analyses of the KNM-LH 1 cranium document the temporal and spatial complexity of early modern human morphological variability. Features of cranial shape distinguish KNM-LH 1 and other Middle and Late Pleistocene African fossil crania from those of recent Africans and samples fromen-USMiddle Stone AgeLater Stone Ageostrich eggshellHomo sapiensmodern human originsJournal Article2023-02-0710.1073/pnas.1417909112