https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14009996Edit ImageSaveSaveEditCropCustom TextFriedrich Heinrich Alexander von Humboldt. Line engraving by R. Trossin after H. Biow.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 867 x 1200 px | 300 dpiLarge JPEG 2354 x 3260 px | 300 dpiFree DownloadFriedrich Heinrich Alexander von Humboldt. Line engraving by R. Trossin after H. Biow.More