Grandmother properly cleaning fresh, uncooked produce under a running tap. Original image sourced from US Government… Free Image from public domain license 
Grandmother properly cleaning fresh, uncooked produce under a running tap. Original image sourced from US Government… Free Image from public domain license 
Studie van bladeren (study of leaves) by Joseph August Knip (1777–1847). Original from The Rijksmuseum. Digitally… Free Image from public domain license 
A woman receiving an influenza vaccination at the Maternal and Child Hospital in Vientiane, Laos. Original image sourced from… Free Image from public domain license 
Shells in seaweed by Mary Altha Nims (1817–1907). Original from The Cleveland Museum of Art. Digitally enhanced by… Free Image from public domain license 
Children holding vaccination tube waiting to get vaccinated. Original image sourced from US Government department: Public… Free Image from public domain license 
Studies of eyes (1630–1640) by Jusepe de Ribera. Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free Image from public domain license 
Russell's Sting Ray (Trygon Russellii) from Illustrations of Indian Zoology (1830-1834) by John Edward Gray (1800-1875).… Free Image from public domain license 
Nurse wearing green latex gloves to protect herself. Original image sourced from US Government department: Public Health… Free Image from public domain license 
Illustration of the collier from The Costume of Yorkshire (1814) by George Walker (1781-1856). This image features also… Free Image from public domain license 
Chinese butterfly and insect painting from the Qing Dynasty (1644–1911) by anonymous. Original from The MET Museum.… Free Image from public domain license 
Roseate Spoonbill from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University… Free Image from public domain license 
Asiatic Elephant and Caparisoned Elephant from A history of the earth and animated nature (1820) by Oliver Goldsmith (1730… Free Image from public domain license 
Game Cock, Silver Spangled, White Feathered Bantam Hen, Dorking Hen, Black Polish Hen, Malay Cock, and Hen from A history of… Free Image from public domain license 
Bactrian Camel, Arabian Camel Or Dromedary, Dromedaries Caparisoned, and Post Camel of India from A history of the earth and… Free Image from public domain license 
Opah (Lampris guttatus) illustration from The Natural History of British Fishes (1802) by Edward Donovan (1768-1837).… Free Image from public domain license 
Great White Heron from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University… Free Image from public domain license 
Witch of Endor raising the spirit of Samuel illustration by William Blake (1752-1827). Original from The New York Public… Free Image from public domain license 
Collection of various dogs and cocker from A history of the earth and animated nature (1820) by Oliver Goldsmith (1730-1774).… Free Image from public domain license 
Salmon, Gilse, Salmon Trout, Great Lake Trout, Lake Trout, River Trout, and Parr from A history of the earth and animated… Free Image from public domain license 
Illustration of jockies from The Costume of Yorkshire (1814) by George Walker (1781-1856). Original from The New York Public… Free Image from public domain license 
Illustration of the dog breaker from The Costume of Yorkshire (1814) by George Walker (1781-1856). Original from The New York… Free Image from public domain license 
1. Spotted Bearded Shark (Scyllium maculatum); 2. Ornamented Bearded Shark (Scyllium ornatum) from Illustrations of Indian… Free Image from public domain license 
Brown Pelican from Birds of America (1827) by John James Audubon (1785 - 1851), etched by Robert Havell (1793 - 1878).… Free Image from public domain license 
Illustration of the east riding or wolds waggon from The Costume of Yorkshire (1814) by George Walker (1781-1856). Original… Free Image from public domain license 
Coats and a cowboy hat at the "Hole-in-the-Wall" Cabin at Old Trail Town, a historic museum complex in Cody, Wyoming. Hole-in… Free Image from public domain license 
Illustration of leech finders from The Costume of Yorkshire (1814) by George Walker (1781-1856). Original from The New York… Free Image from public domain license 
Indian Armed Rhinobatos (Rhinobatos armatus) from Illustrations of Indian Zoology (1830-1834) by John Edward Gray (1800… Free Image from public domain license 
Overgrown Rocks (ca. 1809–1812) by Joseph August Knip. Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free Image from public domain license 
Honey Bee, Worker, Male, Queen, Common Humble Bee, Lapidary Bee, Male, Female, Moss or Carder Bee, Donovan's Humble Bee… Free Image from public domain license 
Hager Selsilis (Gebel el Silsila) illustration by David Roberts (1796–1864). Original from The New York Public Library.… Free Image from public domain license 
Snow Storm in Vermont by Mary Altha Nims (1817–1907). Original from The Cleveland Museum of Art. Digitally enhanced by… Free Image from public domain license 
Drie vliegende vogels (1878–1917) print in high resolution by Theo van Hoytema. Original from The Rijksmuseum.… Free Image from public domain license 
Red Orang-Outang, Diana Monkey, Guereza Monket, Veried Monkey, Collared White-Eyelid Monkey, and Green Monkey from A history… Free Image from public domain license 
Wenskaart met twee uilen (1890) print in high resolution by Theo van Hoytema. Original from The Rijksmuseum. Digitally… Free Image from public domain license 
The Cross by Moonlight by Mary Altha Nims (1817–1907). Original from The Cleveland Museum of Art. Digitally enhanced by… Free Image from public domain license 
Brown Ray (Raja miraletus) illustration from The Natural History of British Fishes (1802) by Edward Donovan (1768-1837).… Free Image from public domain license 
Bar-Tailed Humming Bird, Stoke Humming Bird, Underwood's Humming Bird, Gould's Humming Bird, and Topaz Throated Humming Bird… Free Image from public domain license 
The gate of Citzenib looking towards the desert of Suez Cairo illustration by David Roberts (1796–1864). Original from… Free Image from public domain license 
American Wild Turkey, Crested Curassow, Galeated Curassow, and Red Curassow from A history of the earth and animated nature… Free Image from public domain license 
Lesser Redpole, Goldfinch Male & Female, Siskin, Reed Bunting, and Golden Crested Wren from A history of the earth and… Free Image from public domain license 
Grisly Bear, European Brown Bear ,American Black Bear, Polar Bear from A history of the earth and animated nature (1820) by… Free Image from public domain license 
Mallard Duck from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University of… Free Image from public domain license 
Blue Winged Shoveler or Broad Bill, Teal, Harlequin Duck, Scaup Duck, Female Scaup Duck, and Red Headed Pochard from A… Free Image from public domain license 
Great Sea Eagle, Golden Eagle, Small Cape Eagle, and Wedge Tailed Eagle from A history of the earth and animated nature… Free Image from public domain license 
Rooster by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free Image from public domain license 
Illustration of woman making oat cakes from The Costume of Yorkshire (1814) by George Walker (1781-1856). Original from The… Free Image from public domain license 
Long-billed Curlew from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from… Free Image from public domain license 
Great Auk from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University of… Free Image from public domain license 
Ruffed Grouse from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University of… Free Image from public domain license 
Black Vulture, or Carrion Crow from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original… Free Image from public domain license 
Indian Jerboa Rat (Gerbillus Indicus) from Illustrations of Indian zoology (1830-1834) by John Edward Gray (1800-1875).… Free Image from public domain license 
Illustration of Sheffield cutler from The Costume of Yorkshire (1814) by George Walker (1781-1856). Original from The New… Free Image from public domain license 
American Pied-billed from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from… Free Image from public domain license 
Trumpeter Swan from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University of… Free Image from public domain license 
Tufted-tailed Porcupine (Hystrix fasiculata) from Illustrations of Indian zoology (1830-1834) by John Edward Gray (1800… Free Image from public domain license 
Canvas backed Duck from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from… Free Image from public domain license 
Long-tailed or Dusky Grous from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from… Free Image from public domain license 
Chinese butterfly and insect painting from the Qing Dynasty (1644–1911) by anonymous. Original from The MET Museum.… Free Image from public domain license 
Chinese butterfly and insect painting from the Qing Dynasty (1644–1911) by anonymous. Original from The MET Museum.… Free Image from public domain license 
Vintage European style key engraving from Six Semaines de vacances by Paul Poiré (1880). Original from the British… Free Image from public domain license 
Modern bedroom from Mrs. Beeton's Book of Household Management. Digitally enhanced from our own 1923 edition. Free Image from public domain license 
Plants from Five Capitals in the Villa Mattei in Rome, The Baths of Caracalla and Two Capitals from the Villa Mattei in Rome… Free Image from public domain license 
Illustration of Constrictor boa from Zoological lectures delivered at the Royal institution in the years 1806-7 illustrated… Free Image from public domain license 
Vintage European style key engraving from Six Semaines de Vacances by Paul Poiré. Original from the British Library.… Free Image from public domain license 
The Great Temple of Aboo Simble Nubia illustration by David Roberts (1796–1864). Original from The New York Public… Free Image from public domain license 
Chinese butterfly and insect painting from the Qing Dynasty (1644–1911) by anonymous. Original from The MET Museum.… Free Image from public domain license 
Ducks (1873–1917) print in high resolution by Theo van Hoytema. Original from The Rijksmuseum. Digitally enhanced by… Free Image from public domain license 
Front elevation of the Great Temple of Aboosimble Nubia illustration by David Roberts (1796–1864). Original from The… Free Image from public domain license 
Interior of the Temple of Aboo Simbel Nubia illustration by David Roberts (1796–1864). Original from The New York… Free Image from public domain license 
A Part of an Aqueduct in Rome (ca. 1809–1812) by Joseph August Knip. Original from The Rijksmuseum. Digitally enhanced… Free Image from public domain license 
Vintage European style steam locomotive engraving from The Tourists' Handy Guide to Scotland by William Paterson (1880).… Free Image from public domain license 
Temple of Egyptian illustration by David Roberts (1796–1864). Original from The New York Public Library. Digitally… Free Image from public domain license 
Illustration of Elephant from Zoological lectures delivered at the Royal institution in the years 1806-7 illustrated by… Free Image from public domain license 
Ruins of Karnack Temple illustration by David Roberts (1796–1864). Original from The New York Public Library. Digitally… Free Image from public domain license 
Temple of Dandour (Dendur) Nubia illustration by David Roberts (1796–1864). Original from The New York Public Library.… Free Image from public domain license 
Vintage European style horseback riding race engraving by Charles Simon Pascal Soullier (1861). Original from the British… Free Image from public domain license 
Twaite Shad, Herrings, Sprats or Garvies, Pilchard, Anchovy, and White Bait from A history of the earth and animated nature… Free Image from public domain license 
Illustration of the cranberry girl from The Costume of Yorkshire (1814) by George Walker (1781-1856). Original from The New… Free Image from public domain license 
Collection of various rodents from A history of the earth and animated nature (1820) by Oliver Goldsmith (1730-1774).… Free Image from public domain license 
Winter Hawk from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University of… Free Image from public domain license 
Illustration of the cloth hall from The Costume of Yorkshire (1814) by George Walker (1781-1856). Original from The New York… Free Image from public domain license 
Red-breasted Merganser from Birds of America (1827) by John James Audubon (1785 - 1851), etched by Robert Havell (1793 -… Free Image from public domain license 
Seated Breton Woman (1886) by Paul Gauguin. Original from The Art Institute of Chicago. Digitally enhanced by rawpixel. Free Image from public domain license 
European Oyster Catcher, Grey Phalarope (Summer Plumage), Purre or Dunlin (Summer Plumage), Ringed Dotterel, Turnstone… Free Image from public domain license 
Illustration of line swinglers from The Costume of Yorkshire (1814) by George Walker (1781-1856). Original from The New York… Free Image from public domain license