https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13966480Edit ImageSaveSaveEditCropCustom TextHuman skulls: four figures. Line engraving, 1780/1800.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 738 x 1200 px | 300 dpiLarge JPEG 1093 x 1777 px | 300 dpiFree DownloadHuman skulls: four figures. Line engraving, 1780/1800.More