Portrait of Sir Major-General William Rose Mansfield, 1st Baron Sandhurst by Felice Beato https://www.rawpixel.com/image/14324884/photo-image-rose-face-personFree Image from public domain licenseSea Lamprey from the Cheboygan River Trap SitePhoto by Karla Bartelt/USFWS. Original public domain image from Flickr https://www.rawpixel.com/image/4029112/photo-image-plant-food-snakeFree Image from public domain licenseUnidentified small woman standing, holding a vase on a table by C Rummel https://www.rawpixel.com/image/14306451/unidentified-small-woman-standing-holding-vase-table-rummelFree Image from public domain licenseBlue splash texture in microscope. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3298322/free-photo-image-texture-ocean-swirlFree Image from public domain licenseTwo black-footed ferret standing in soil looking at something. Original public domain image from Flickr https://www.rawpixel.com/image/3261393/free-photo-image-prairie-dog-weasel-animalFree Image from public domain licenseA woman having her hair dressed by a male hairdresser who is assisted by a black servant-boy. Coloured lithograph by G.… https://www.rawpixel.com/image/13959539/image-cartoon-person-artFree Image from public domain licenseJellyfish in dark blue ocean. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3304397/free-photo-image-jellyfish-animal-animals-images-picturesFree Image from public domain licenseFree penguin with a baby chick image, public domain animal CC0 photo. https://www.rawpixel.com/image/5903845/photo-image-background-public-domain-natureFree Image from public domain licenseA preserved skull of a woman who had been suffering from syphilis, died in 1796. Line engraving. https://www.rawpixel.com/image/13964187/image-cartoon-face-personFree Image from public domain licenseRuby-crowned kinglet (Regulus calendula) along Artists Paintpots Trail by Jacob W. Frank. Original public domain image from… https://www.rawpixel.com/image/4038622/photo-image-tree-plant-birdFree Image from public domain licenseFree Puente General Rafael Urdaneta bridge image, public domain CC0 photo. https://www.rawpixel.com/image/5905724/photo-image-background-public-domain-freeFree Image from public domain licenseA girl born without an arm. Reproduction, 1905, of a photograph by G. Kelly. https://www.rawpixel.com/image/13995288/girl-born-without-arm-reproduction-1905-photograph-kellyFree Image from public domain licenseGreen Tree Python (2007) by Smithsonian Institution. Original from Smithsonian's National Zoo. Digitally enhanced by… https://www.rawpixel.com/image/3060888/free-photo-image-snake-zoo-artFree Image from public domain licenseCheetah (2014) by Ronda Gregorio. Original from Smithsonian's National Zoo. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/3060055/free-photo-image-cheetah-cat-photographyFree Image from public domain licenseA witch surfing on a sieve. Mezzotint by C. Turner, 1807, after J.J. Halls. https://www.rawpixel.com/image/14021243/witch-surfing-sieve-mezzotint-turner-1807-after-jj-hallsFree Image from public domain licenseA pug wrapped in a plaid blanket sitting on the forest floor. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3304941/free-photo-image-animal-pug-bagFree Image from public domain licenseBlack and white macro of modern line building architecture with windows in Toronto. Original public domain image from… https://www.rawpixel.com/image/3283222/free-photo-image-modern-symbol-facadeFree Image from public domain licenseFree view of Westminster bridge and Big Ben in London image, public domain CC0 photo. https://www.rawpixel.com/image/5924003/photo-image-background-public-domain-skyFree Image from public domain licenseGroup portrait of four servants of Jean-Gabriel Eynard by Jean Gabriel Eynard https://www.rawpixel.com/image/14280142/group-portrait-four-servants-jean-gabriel-eynard-jean-gabriel-eynardFree Image from public domain licenseLouis Pasteur. Wood engraving by Ch. Baude after A.G.A. Edelfelt, 1885. https://www.rawpixel.com/image/13980065/louis-pasteur-wood-engraving-ch-baude-after-aga-edelfelt-1885Free Image from public domain licenseAylmer Bourke Lambert. Stipple engraving by W. Evans, 1810, after H. Edridge. https://www.rawpixel.com/image/14000550/aylmer-bourke-lambert-stipple-engraving-evans-1810-after-edridgeFree Image from public domain license"Horror" from Le Brun, Bowles's Passions of the soul, circa 1785 https://www.rawpixel.com/image/13979078/horror-from-brun-bowless-passions-the-soul-circa-1785Free Image from public domain licenseGiuseppe Mangili. Line engraving by V. Rolla after G. Garavaglia. https://www.rawpixel.com/image/13976460/giuseppe-mangili-line-engraving-rolla-after-garavagliaFree Image from public domain licenseA hind standing on a crag in the forest belling with a group of stags and deer resting on patch of grass below. Etching by… https://www.rawpixel.com/image/14004912/image-dog-horse-cartoonFree Image from public domain licenseA chemist examining a flask of golden liquid, with a book and chemical apparatus. Colour process print. https://www.rawpixel.com/image/13951414/image-face-person-booksFree Image from public domain licenseMonarch instar larva on milkweed. Original public domain image from Flickr https://www.rawpixel.com/image/3261855/free-photo-image-caterpillar-honey-bee-animalFree Image from public domain licenseOutlines of lectures on mental diseases / By Alexander Morison. https://www.rawpixel.com/image/14021505/outlines-lectures-mental-diseases-alexander-morisonFree Image from public domain licenseThomas Pennant. Mezzotint by C. Tomkins, 1869, after T. Gainsborough, 1776. https://www.rawpixel.com/image/13991148/thomas-pennant-mezzotint-tomkins-1869-after-gainsborough-1776Free Image from public domain licenseAn attendant standing with a hookah (smoking pipe). Gouache painting by an Indian painter. https://www.rawpixel.com/image/13955704/image-cartoon-face-personFree Image from public domain licenseFranz Ernst Brueckmann. Line engraving by E. L. Creite, 1727. https://www.rawpixel.com/image/13991032/franz-ernst-brueckmann-line-engraving-creite-1727Free Image from public domain licenseAn apothecary with instruments of his profession seated in an arched window. Lithograph by M. Vernaut after G. Metsu. https://www.rawpixel.com/image/13976784/image-cartoon-face-personFree Image from public domain licenseJan.11, 2013: "President Obama walks with President Hamid Karzai of Afghanistan on the White House Colonnade after their… https://www.rawpixel.com/image/4051172/image-public-domain-people-manFree Image from public domain licenseAnthony Ashley Cooper, 7th Earl of Shaftesbury. Engraving. https://www.rawpixel.com/image/13987370/anthony-ashley-cooper-7th-earl-shaftesbury-engravingFree Image from public domain licenseSaint Peter in prison visited by Saint Paul. Etching by T. Patch, 1770, after Filippino Lippi. https://www.rawpixel.com/image/13958616/image-face-person-artFree Image from public domain licenseSir Benjamin Collins Brodie. Engraving by J. Brain after H. Room. https://www.rawpixel.com/image/13987953/sir-benjamin-collins-brodie-engraving-brain-after-roomFree Image from public domain license