https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13993309Edit ImageSaveSaveEditCropCustom TextKarl Wilhelm Theodor Richard Hertwig. Photograph by Müller- Milsdorf, 1930.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 854 x 1200 px | 300 dpiLarge JPEG 2362 x 3318 px | 300 dpiFree DownloadKarl Wilhelm Theodor Richard Hertwig. Photograph by Müller- Milsdorf, 1930.More