Cinnamon teal pair (Anas cyanoptera) on Yellowstone River by Jacob W. Frank. Original public domain image from Flickr https://www.rawpixel.com/image/4038623/photo-image-bird-waterFree Image from public domain licenseA treatise on operative surgery comprising a description of the various processes of the art, including all the new… https://www.rawpixel.com/image/13967496/image-hand-person-artFree Image from public domain licenseMikroskopische Untersuchungen über die Uebereinstimmung in der Struktur und dem Wachsthum der Thiere und Pflanzen / Von Th.… https://www.rawpixel.com/image/13987863/image-background-paper-cartoonFree Image from public domain licenseAnatomie comparée du système nerveux considéré dans ses rapports avec l'intelligence / Par Fr. Leuret et P. 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Howship, 1808. https://www.rawpixel.com/image/14008105/image-paper-art-patternFree Image from public domain licenseAttic Red-Figure Kylix Fragment (comprised of 6 Joined Fragments) https://www.rawpixel.com/image/14269193/attic-red-figure-kylix-fragment-comprised-joined-fragmentsFree Image from public domain licenseFlatirons 20 min exposure Night Sky with Stars Jacob HolgersonCredit NPS/Jacob Holgerson. Original public domain image from… https://www.rawpixel.com/image/4033514/photo-image-light-plant-spaceFree Image from public domain licenseEpistola anatomica, problematica, duodecima / authore Mich. Ernesto Ettmullero ... ad virum clarissimum Fredericum Ruyschium… https://www.rawpixel.com/image/13981704/image-cartoon-plant-treeFree Image from public domain license10.U.S. Navy Seaman Kyle Taylor, an operations specialist, observes passing ships through the ?Big Eyes? during sunset… https://www.rawpixel.com/image/3318668/free-photo-image-big-eyes-cc0-creative-commonsFree Image from public domain licenseJuliste saksalaiseen taidenäyttelyyn ateneumissa 1922, 1922, by Akseli Gallen-Kallela https://www.rawpixel.com/image/8864256/image-art-public-domain-paintingFree Image from public domain licenseAn Indian snake of the Boa genus, Gedi Paragoodoo. Coloured engraving by W. Skelton, ca. 1796. https://www.rawpixel.com/image/13979649/image-paper-art-patternFree Image from public domain licenseDissection of the groin and lower abdomen of a man, with the muscles and blood vessels indicated. 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Watercolour. https://www.rawpixel.com/image/13958953/lotus-root-nelumbo-nucifera-part-rhizome-watercolourFree Image from public domain licenseDe formato foetu. [De brutorum loquela. De venarum ostiolis. De locutione et eius instrumentis liber / a J. Ursino editus]. https://www.rawpixel.com/image/13975340/image-paper-cartoon-personFree Image from public domain licenseAttic Black-Figure Neck Amphora Fragment by Nessos Painter https://www.rawpixel.com/image/14270020/attic-black-figure-neck-amphora-fragment-nessos-painterFree Image from public domain licenseMale Coaster Brook TroutMale coaster brook trout reared at Iron River National Fish Hatchery in Wisconsin. 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