Georgia O’Keeffe – Hands and Horse Skull (1931) by Alfred Stieglitz. Original from The Art Institute of Chicago.… https://www.rawpixel.com/image/3813997/photo-image-art-hands-peopleFree Image from public domain licenseAn x–ray of an ununited anconeal process (UAP) in a dog. UAP is a genetic disease of the canine elbow and commonly… https://www.rawpixel.com/image/2298619/free-photo-image-vintage-xray-photosFree Image from public domain licenseSkeleton of dinosaur with black background. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3340513/free-photo-image-dinosaur-fossil-snakeFree Image from public domain licenseBone fence, Bedrock City, Rts. 64 and 180, Valle, Arizona (1987) photography in high resolution by John Margolies. Original… https://www.rawpixel.com/image/3797142/photo-image-blue-vintage-retroFree Image from public domain licenseGold-inlaid Colt Model 1851 Navy Revolver (serial no. 20133), with Case and Accessories https://www.rawpixel.com/image/9186333/photo-image-paper-aesthetics-frameFree Image from public domain licenseSyncerus caffer, (African buffalo). Skull and neck vertebrae. Galleries of Paleontology and Compared Anatomy. Original… https://www.rawpixel.com/image/3340519/free-photo-image-cc0-creative-commonsFree Image from public domain licenseBull elk skull along the Yellowstone River Trail. Original public domain image from Flickr https://www.rawpixel.com/image/4032686/photo-image-background-nature-mountainFree Image from public domain licenseWoman holding dead animal head image, public domain nature CC0 photo. https://www.rawpixel.com/image/5904626/photo-image-background-public-domain-artFree Image from public domain licenseA cow skull - Original image from Carol M. Highsmith’s America, Library of Congress collection. Digitally enhanced by… https://www.rawpixel.com/image/434231/free-photo-image-die-carol-highsmith-texasFree Image from public domain licenseOpenwork furniture plaque with a striding, ram-headed sphinx, Assyrian https://www.rawpixel.com/image/9184654/photo-image-mesopotamia-wood-carving-african-artFree Image from public domain licenseTwo hands, viewed through x-ray. Photoprint from radiograph after Sir Arthur Schuster, 1896. https://www.rawpixel.com/image/13957681/photo-image-hand-hospital-public-domainFree Image from public domain licenseAbandoned bones in the woods. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3370184/free-photo-image-dead-animal-forest-abandoned-bonesFree Image from public domain licenseSkull (20th century). Original public domain image from The Smithsonian Institution. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/10103530/photo-image-face-vintage-skullFree Image from public domain licenseOpenwork furniture plaque with sphinx striding through a floral landscape https://www.rawpixel.com/image/9085921/photo-image-art-vintage-public-domainFree Image from public domain licenseCloseup on realistic human skeleton in forest. Free public domain CC0 image. https://www.rawpixel.com/image/6032046/photo-image-public-domain-forest-freeFree Image from public domain licenseA skull prepared for demonstration: front view. Photograph. https://www.rawpixel.com/image/13970604/skull-prepared-for-demonstration-front-view-photographFree Image from public domain licenseJosh White Model Guitar and case owned by Josh White, National Museum of African American History and Culture https://www.rawpixel.com/image/8847846/photo-image-texture-paper-artFree Image from public domain licenseDish with Design of Foliate Motifs (c.1600) ornamental design in high resolution by anonymous. https://www.rawpixel.com/image/7728600/photo-image-art-public-domain-artworksFree Image from public domain licenseCloseup on realistic human skulls in black and white. Free public domain CC0 image. https://www.rawpixel.com/image/6032133/photo-image-face-public-domain-blackFree Image from public domain licenseIncised horse frontlet carved into the shape of a flowering, volute palmette tree https://www.rawpixel.com/image/9330908/photo-image-art-vintage-leavesFree Image from public domain licenseThe skeleton of a friar in the role of Death as the reaper, surrounded by skulls, ribs and vertebrae, in a chapel.… https://www.rawpixel.com/image/14008892/photo-image-face-person-crossFree Image from public domain licenseSkeleton of a man, a woman from the Akka tribe and a gorilla (provided by the hunter-naturalist Paul Du Chaillu), displayed… https://www.rawpixel.com/image/13951473/photo-image-person-art-skeletonFree Image from public domain licenseAn Alaskan Inuit skull, showing the effects of syphilis. Photograph by Ales Hrdlicka, ca. 1910. https://www.rawpixel.com/image/13951380/photo-image-face-person-black-backgroundFree Image from public domain license