https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13980760Edit ImageSaveSaveEditCropCustom TextHuman skulls in silhouette: four figures. Line engraving, 1780/1800.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 748 x 1200 px | 300 dpiLarge JPEG 2125 x 3411 px | 300 dpiFree DownloadHuman skulls in silhouette: four figures. Line engraving, 1780/1800.More