https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13959427Edit ImageSaveSaveEditCropCustom TextSkull of a hippopotamus, with mouth wide open. Chromolithograph by H.J. Ruprecht, 1877.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 970 px | 300 dpiLarge JPEG 3236 x 2616 px | 300 dpiFree DownloadSkull of a hippopotamus, with mouth wide open. Chromolithograph by H.J. Ruprecht, 1877.More