https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13966443Edit ImageSaveSaveEditCropCustom TextSkull of an orang-utang: four figures. Chromolithograph, 1877.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 975 x 1200 px | 300 dpiLarge JPEG 2728 x 3356 px | 300 dpiFree DownloadSkull of an orang-utang: four figures. Chromolithograph, 1877.More