https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14003388Edit ImageSaveSaveEditCropCustom TextFriedrich Heinrich Alexander von Humboldt. Stipple engraving by C. Cook after Emma Gaggiotti-Richards, 1854.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 855 x 1200 px | 300 dpiLarge JPEG 2454 x 3446 px | 300 dpiFree DownloadFriedrich Heinrich Alexander von Humboldt. Stipple engraving by C. Cook after Emma Gaggiotti-Richards, 1854.More