https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13963106Edit ImageSaveSaveEditCropCustom TextA man in an acrobat's outfit teaches a dog a trick while another dog looks on. Colour line block after C. MacIver Grierson.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 867 px | 300 dpiLarge JPEG 3189 x 2305 px | 300 dpiFree DownloadA man in an acrobat's outfit teaches a dog a trick while another dog looks on. Colour line block after C. MacIver Grierson.More