Fig. 2 Schematic drawings of Göbekli Tepe skulls. Schematic drawings of Göbekli Tepe skulls. Gray, preserved elements; red, modifications. (A) Frontal, superior, and posterior view of skull 1. (B) Frontal, superior, and lateral view of skull 2. (C) Frontal, superior, and lateral view of skull 3. Julia Gresky et al. Sci Adv 2017;3:e1700564 Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).