General Webb's Headquarters, Culpepper, Va., December, 1863. by A J Russell https://www.rawpixel.com/image/14285642/general-webbs-headquarters-culpepper-va-december-1863-russellFree Image from public domain licenseBones of the skull: eleven figures. Line engraving, ca. 1850. https://www.rawpixel.com/image/13974586/bones-the-skull-eleven-figures-line-engraving-ca-1850Free Image from public domain licenseMicrographia: or some physiological descriptions of minute bodies made by magnifying glasses. With observations and… https://www.rawpixel.com/image/13975840/image-paper-plant-treeFree Image from public domain licenseHoneybee and purple flower background. Free public domain CC0 image. https://www.rawpixel.com/image/6028238/photo-image-background-flower-public-domainFree Image from public domain licenseA water-wheel for raising water; in the background is the Escorial Palace. Coloured lithograph. https://www.rawpixel.com/image/13958085/image-background-cow-artFree Image from public domain licenseA couple hovering off the ground being observed by a huge goat with two cats. Etching by F. Goya, 1796/1798. https://www.rawpixel.com/image/13979785/image-dog-cat-cartoonFree Image from public domain licenseUpper Saranac Lake - Bartlett's Landing Moonlight by G W Baldwin https://www.rawpixel.com/image/14305147/upper-saranac-lake-bartletts-landing-moonlight-baldwinFree Image from public domain licenseCavalry Camp, Balaklava, looking towards the Plateau of Sebastopol. by Roger Fenton https://www.rawpixel.com/image/14281208/photo-image-horse-cow-personFree Image from public domain licenseA large Walrus (Odobenus rosmarus divergens) resting on sea ice, Bering Sea, Alaska. https://www.rawpixel.com/image/9975891/photo-image-art-vintage-animalFree Image from public domain licenseTwo Chinese farmers feed a family of pigs. Gouache painting by a Chinese artist, ca. 1850. https://www.rawpixel.com/image/13953182/image-dog-cartoon-personFree Image from public domain license'Tis the Rock of Ages, My Protection. by Benjamin West Kilburn https://www.rawpixel.com/image/14295675/tis-the-rock-ages-protection-benjamin-west-kilburnFree Image from public domain licenseR.L. Eddy's Hardware store & Tin shop, Easton, Massachusetts https://www.rawpixel.com/image/14301630/rl-eddys-hardware-store-tin-shop-easton-massachusettsFree Image from public domain licenseHumpback whale, flipping tail. Original public domain image from Flickr https://www.rawpixel.com/image/8752776/photo-image-public-domain-ocean-natureFree Image from public domain licenseA gipsy girl having her hair dressed by an old woman. Reproduction of a wood engraving after G. Doré. https://www.rawpixel.com/image/13994290/image-cartoon-face-tigerFree Image from public domain licenseThe Elephant. (Trunk lost.) - Lookout Mountain, Tennessee by J Birney Linn https://www.rawpixel.com/image/14294167/the-elephant-trunk-lost-lookout-mountain-tennessee-birney-linnFree Image from public domain licenseGroup of bison migrating through the snow near Blacktail Pondsby Jacob W. Frank. Original public domain image from Flickr https://www.rawpixel.com/image/4038794/photo-image-animal-public-domainFree Image from public domain licenseStereocerus haematopus (side view)NPS PhotoUSA: Wyoming, Park CountyYellowstone NP, Washburn TopPitfall Trap, Elev: 2932 m25… https://www.rawpixel.com/image/4038114/photo-image-animal-public-domainFree Image from public domain licenseAbove, a roebuck crossing a shallow stream in the forest, below, its track. Etching by J. E. Ridinger. https://www.rawpixel.com/image/13989002/image-cartoon-plant-treeFree Image from public domain licenseTwo sub-adult members of the Marsh Pride sit atop an earthen mound on the savannah of the Masai Mara National Reserve https://www.rawpixel.com/image/8812037/photo-image-public-domain-natures-prideFree Image from public domain licenseBo, left, and Sunny, the Obama family dogs, on the South Lawn of the White House, Aug. 19, 2013. https://www.rawpixel.com/image/4048875/photo-image-public-domain-dog-animalFree Image from public domain licensePhilbostroma quadrimaculatum (side view)NPS / Alyssa CanovaUSA: Wyoming, Park CountyYellowstone NP04 July 2019. Original… https://www.rawpixel.com/image/4038242/photo-image-animal-public-domainFree Image from public domain licenseSpring 2021 on the U.S. Capitol Campus. Original public domain image from Flickr https://www.rawpixel.com/image/4051525/photo-image-flower-plant-cherry-blossomFree Image from public domain licenseUnidentified little boy standing, with a little black dog seated in a chair by Augustus Morand https://www.rawpixel.com/image/14307003/photo-image-dog-face-personFree Image from public domain licenseAbstract snail hand drawn illustration. Free public domain CC0 image. https://www.rawpixel.com/image/6283175/image-public-domain-abstract-illustrationsFree Image from public domain licenseWoodbridge's, Alpine County, California by Carleton Watkins https://www.rawpixel.com/image/14286167/woodbridges-alpine-county-california-carleton-watkinsFree Image from public domain licenseCushion Buckwheat - Eriogonum ovalifolium. Original public domain image from Flickr https://www.rawpixel.com/image/3309982/free-photo-image-buckwheat-flower-animal-blossomFree Image from public domain licenseAvenue of Stone Animals Leading to the Ming Tombs, Pekin [sic] https://www.rawpixel.com/image/14315564/avenue-stone-animals-leading-the-ming-tombs-pekin-sicFree Image from public domain licenseHorse owned by J.M. Wishart & blown 1000 ft. tied to mang'r. [Tornado of June 17, 1882, at Grinnell, Iowa] by D H Cross https://www.rawpixel.com/image/14290554/photo-image-horse-person-woodFree Image from public domain licenseA bull bison grazes near Clearwater Springs by Jacob W. Frank. Original public domain image from Flickr https://www.rawpixel.com/image/4038113/photo-image-animal-public-domainFree Image from public domain licenseDevil's Lake and Vicinity. Through the Pines on Kirk's Cliff. by Henry Hamilton Bennett https://www.rawpixel.com/image/14288650/photo-image-plant-tree-artFree Image from public domain licenseMeasuring jugs and a funnel hung on a wall in the Red Cross pharmacy in London. Photograph. https://www.rawpixel.com/image/14002289/photo-image-cross-pharmacy-woodFree Image from public domain license