My current research is basically three-fold: (1) to study the brain endocasts of fossil hominids to better understand how the human brain evolved; (2) to continue studies on ape brain endocast morphology and variation as a comparative basis for (1); (3) to study modern human brain variation with regard to brain weight, brain organization, and sexual dimorphism.

Representative Publications:

1990. "Sexual dimorphism in the human corpus callosum: its evolutionary and clinical implications." In G. Sperber (Ed.) From Apes to Angels: Essays in Anthropology in Honor of Phillip V. Tobias. New York: Wiley-Liss, pp. 221-228.

1992. "The failure of the gyrification index (GI) to account for volumetric reorganization in the evolution of the human brain." Journal of Human Evolution. 22:163-170.

1994. et al. "Sexual Dimorphisn of the Human Corpus Callosum from three independent autopsy samples: relative size of the corpus collasum." Am. J. Phys. Anthrop. 92: 481-498.

1995. "Towards synthetic theory of human brain evolution." In J.P. Changeaux and C. Chavillon, Eds. Origins of the Human Brain. Oxford: Oxford University Press.

1996. "Evolution of the human brain." In A. Lock and C.R. Peters., eds. Handbook of Human Symbolic Evolution. Clarendon Press, Oxford, pp. 74-107.

1997. "Brain Evolution." In: Encyclopedia of Human Biology. Vol 2., 2nd. Ed. N.Y.:Academic Press, pp. 189-200.

1998. With P. Gannon, D. Broadfield, A. Braun. "Asymmetry of Chimpanzee Planum Temporale: human like Brain Pattern of Language area." Science 279:220-222.

2004. "The Human Fossil Record", Vol. 3, Brain Endocasts. (With D. Broadfield and M.Yuan) Wiley-Liss.

2004. "Posterior lunate sulcus is Australopithecus africanus: was Dart right? (With PV Tobias and RJ Clarke). CR Palvol 3:287-293.