https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14007403Edit ImageSaveSaveEditCropCustom TextKangaroo and vulpine opossum skulls: side views. Etching by P. Mazell, 1789.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 875 x 1200 px | 300 dpiLarge JPEG 2362 x 3239 px | 300 dpiFree DownloadKangaroo and vulpine opossum skulls: side views. Etching by P. Mazell, 1789.More