https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13951446Edit ImageSaveSaveEditCropCustom TextLeft, poisonous fang of an asp viper; right, head of an adder, with mouth wide open and tongue protruding. Chromolithograph by H.J. Ruprecht, 1877.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 963 px | 300 dpiLarge JPEG 3200 x 2567 px | 300 dpiFree DownloadLeft, poisonous fang of an asp viper; right, head of an adder, with mouth wide open and tongue protruding. Chromolithograph by H.J. Ruprecht, 1877.More