"""Comparison of skull features of Homo naledi and other early human species"" by Chris Stringer, Natural History Museum, United Kingdom - Stringer, Chris (10 September 2015). ""The many mysteries of Homo naledi"". eLife 4: e10627. DOI:10.7554/eLife.10627. PMC: 4559885. ISSN 2050-084X.. Licensed under CC BY 4.0 via Commons - https://commons.wikimedia.org/wiki/File:Comparison_of_skull_features_of_Homo_naledi_and_other_early_human_species.jpg#/media/File:Comparison_of_skull_features_of_Homo_naledi_and_other_early_human_species.jpg"