Fig. 3.

Comparison of human and chimpanzee mean configurations of brain and neurocranial features. (A–C) Human brain (A), neurocranium (C), and neurocranium+brain (B); (I–K) chimpanzee brain (I), neurocranium (K), and neurocranium+brain (J); (E–G) differences between human (blue) and chimpanzee (red) configurations for brain (E), neurocranium (G), and neurocranium+brain (F). (D, H, and L) Tensor maps visualizing the relative amount and direction of local variation of brain (green) and neurocranial (blue) features in humans (D), chimpanzees (L), and in the pooled sample of humans and chimpanzees (H); features only sampled in 1 species are rendered in yellow ellipsoids. Abbreviations as in SI Appendix, Table S1. The arrowhead in E indicates the position of the human po.