Leaping Brook Trout chromolithograph (1874) by Samuel Kilbourne. Original from Museum of New Zealand. Digitally enhanced by…Free from public domain license
Red Drum chromolithograph (1878) by Samuel Kilbourne. Original from Museum of New Zealand. Digitally enhanced by rawpixel.Free from public domain license
Gigantic Whale: The Greenland Whale (or Baloena Musculus), Blue Whale, Balaenoptera musculus (Linnaeus,1758) (1832) by George…Free from public domain license
Ultrastructural morphology shown by coronavirus. Original image sourced from US Government department: Public Health Image…Free Photo from public domain license
Ultrastructural morphology exhibited by coronaviruses similar to COVID-19 which became pandemic. Original image sourced from…Free Photo from public domain license
Trochilidae–Kolibris from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress. Digitally…Free from public domain license
Masks worn during experiments with plague. Manila, Philippines (1912). Original image from National Museum of Health and…Free Photo from public domain license
Ascidiae–Seescheiden from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress. Digitally…Free from public domain license
Emergency hospital during influenza epidemic, Camp Funston, Kansas (1918). Original image from National Museum of Health and…Free Photo from public domain license
The American Soldiers in Presence of Gas during World War I (1918). Original image from National Museum of Health and…Free Photo from public domain license
Cranes from Momoyogusa–Flowers of a Hundred Generations (1909) by Kamisaka Sekka. Original from the The New York Public…Free from public domain license
Insects and Flowers (Qing dynasty ca. 1644–1911) by Ju Lian. Original from The Getty. Digitally enhanced by rawpixel. Free from public domain license
Women wearing surgical masks during the influenza epidemic, Brisbane (1919). Original image from State Library of Queensland.…Free Photo from public domain license
Star-glory Morning–glory (1827) by Pierre-Joseph Redouté and Henry Joseph Redouté. Original from The…Free from public domain license
Cerfs et arbres, papier peint. Écureuil oiseaux et sorbier, bordure from L'animal dans la décoration (1897)…Free from public domain license
Orchideae–Denusblumen / A. Giltsch, gem from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of…Free from public domain license
Mount Fuji from Momoyogusa–Flowers of a Hundred Generations (1909) by Kamisaka Sekka. Original from the The New York…Free from public domain license
Mäda Primavesi (ca. 1912–1913) by Gustav Klimt. Original from The MET Museum. Digitally enhanced by rawpixel.Free from public domain license
American Red Cross canteen workers taking food for family infected with the flu, Charlotte, North Carolina (1918). Original…Free from public domain license
Scarlet Ibis with an Egg (1699–1700) by Maria Sibylla Merian. Original from The Rijksmuseum. Digitally enhanced by…Free from public domain license
The American Soldiers in Presence of Gas suring World War I (1918). Original image from National Museum of Health and…Free Photo from public domain license
Siphonophorae–Staatsquallen from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress.…Free from public domain license
Sand dunes in Southern California. Original image from Carol M. Highsmith’s America, Library of Congress collection.…Free Photo from public domain license
Card Depicting Flowers in Blue Background (1865–1899) by L. Prang & Co. Original from The New York Public Library.…Free from public domain license
Nova totius terrarum orbis geographica ac hydrographica tabula (1635–1649) by Jan Aertse van den Ende. Original from…Free from public domain license
Passiflore Ailee (1827) by Pierre-Joseph Redouté and Henry Joseph Redouté. Original from The Cleveland Museum…Free from public domain license
Deer from Momoyogusa–Flowers of a Hundred Generations (1909) by Kamisaka Sekka. Original from the The New York Public…Free from public domain license
Novel Coronavirus SARS-CoV-2–
This scanning electron microscope image shows SARS-CoV-2 (yellow)—also known as…Free Photo from public domain license
Leptomedusae–Faltenquallen from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress.…Free from public domain license
Chest X–ray of patient with influenza during World War I. Original image from National Museum of Health and Medicine.…Free Photo from public domain license
Camellia: No. 171 from Iconographie du Genre Camellia ou Description et Figures (1839–1843) by Lorenzo Berlèse.…Free from public domain license
Volunteer nurses from The American red cross during flu epidemic (1918). Original image from Oakland Public Library.…Free Photo from public domain license
Scientist testing with coronavirus through test tubes. Original image sourced from US Government department: Public Health…Free Photo from public domain license
Woman using a damp sponge to clean dust collected on a window sill. Original image sourced from US Government department:…Free Photo from public domain license
Bowles's new pocket map of the world: laid down from the latest observations and comprehending the new discoveries to the…Free from public domain license
Columbine, Marigold and Pheasant's Eye from The Language of Flowers, or, Floral Emblems of Thoughts, Feelings, and Sentiments…Free from public domain license
Interior of a hospital ward at the Base Hospital, Camp Jackson, South Carolina, during the influenza epidemic (1918).…Free Photo from public domain license
Reproduction of the "Ladies in Blue" fresco
ca. 1525–1450 B.C. by Emile Gilliéron. Original from The MET Museum.…Free from public domain license
Plattegrond van Parijs (ca. 1721–1774) by Guillaume Delisle. Original from The Rijksmuseum. Digitally enhanced by…Free from public domain license
清 佚名 台南地區荷蘭城堡 Forts Zeelandia and Provintia and the City of Tainan (ca. 1900s) by anonymous. Original from The MET Museum.…Free from public domain license
Discomedusae–Schweibenquallen from Kunstformen der Natur (1904) Ernst Haeckel. Original from Library of Congress.…Free from public domain license
Antilopina–Antilopen from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress. Digitally…Free from public domain license
Cygne sauvage from L'animal dans la décoration (1897) illustrated by Maurice Pillard Verneuil. Original from the The…Free from public domain license
Woman using a damp sponge to clean dust collected on a window sill. Original image sourced from US Government department:…Free Photo from public domain license
Orbis terrae compendiosa descriptio : quam ex magna universali Gerardi Mercatoris Domino Richardo Gartho, geographie ac…Free from public domain license
Scientist removes cell growth medium from a 6–well plate in preparation for a plaque assay, which is a test that allows…Free Photo from public domain license
Healthcare workers donning a pair of protective goggles and protective equipment. Original image sourced from US Government…Free Photo from public domain license
Grandmother properly cleaning fresh, uncooked produce under a running tap. Original image sourced from US Government…Free Photo from public domain license
Acrostichum Alienum from Ferns: British and Exotic (1856-1860) by Edward Joseph Lowe. Original from Biodiversity Heritage…Free from public domain license
Stephoidea–Ringelstrahlinge from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress.…Free from public domain license
A 3D graphic representation of a spherical-shaped, measles virus particle, that was studded with glycoprotein tubercles.…Free Photo from public domain license
Bacon's standard map of Europe by George Washington Bacon (1830–1922). Original from Library of Congress. Digitally…Free from public domain license
A worker wearing a protective mask and suit. Original image sourced from US Government department: Public Health Image…Free Photo from public domain license
Four diagrams of Solar eclipses (1711) by Johannes Buno. Original from Library of Congress. Digitally enhanced by rawpixel.Free from public domain license
Green mountains from Momoyogusa–Flowers of a Hundred Generations (1909) by Kamisaka Sekka. Original from the The New…Free from public domain license
Achillea Clypeolata (Yarrow) enlarged 15 times from Urformen der Kunst (1928) by Karl Blossfeldt. Original from The…Free Photo from public domain license
Asteridea–Seesterne from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress. Digitally…Free from public domain license
MERS Coronavirus Particles–Colorized transmission electron micrograph showing particles of the Middle East respiratory…Free Photo from public domain license
Iris Pumila from The genus Iris by William Rickatson Dykes (1877-1925). Original from The Biodiversity Heritage Library.…Free from public domain license
Lab technician adding a solution to an Enzyme–Linked Immunosorbent Assay (ELISA) plate Original image sourced from US…Free Photo from public domain license
New York City, photographed from two miles up in the air (1922) from The Lionel Pincus and Princess Firyal Map Division.…Free from public domain license
MERS Coronavirus Particle–Middle East Respiratory Syndrome Coronavirus particle envelope proteins immunolabeled with…Free Photo from public domain license
Edwin Aldrin walking on the lunar surface. Neil Armstrong, who took the photograph, can be seen reflected in Aldrin’s…Free Photo from public domain license
Frost from Momoyogusa–Flowers of a Hundred Generations (1909) by Kamisaka Sekka. Original from the The New York Public…Free from public domain license
This photo was assembled from three black and white negatives by the Image Processing Lab at Jet Propulsion Laboratory.…Free Photo from public domain license
Pappagallo detto arara rossa del Brasile (Macaw) by Saverio Manetti (1723–1785). Original from The Beinecke Rare Book &…Free from public domain license
Up-to-date map of the world war (1942) by Manila Shinbun-sha. Original from The Beinecke Rare Book & Manuscript Library.…Free from public domain license
Clinical photograph of a cyst of conjunctiva. Original image from National Museum of Health and Medicine. Digitally enhanced…Free Photo from public domain license
Snow from Momoyogusa–Flowers of a Hundred Generations (ca. 1909–1910) by Kamisaka Sekka. Original from the The…Free from public domain license
Maple from Momoyogusa–Flowers of a Hundred Generations (ca. 1909–1910) by Kamisaka Sekka. Original from the The…Free from public domain license
A medical illustration of drug–resistant, Neisseria gonorrhoeae bacteria. Original image sourced from US Government…Free Photo from public domain license
Map of Zeppelin and aeroplane bombs on London. From: World War I photograph album (1919) by Herbert Green. Original from…Free from public domain license
Schematismus geographiae mathematicae, id est repraesentatio (1753) by Johann Baptista Homann. Original from The Rijksmuseum.…Free from public domain license
Ultrastructural morphology shown by coronavirus. Original image sourced from US Government department: Public Health Image…Free Photo from public domain license
Leaping Brook Trout chromolithograph (1874) by Samuel Kilbourne. Original from Museum of New Zealand. Digitally enhanced by… Free from public domain license 
Red Drum chromolithograph (1878) by Samuel Kilbourne. Original from Museum of New Zealand. Digitally enhanced by rawpixel. Free from public domain license 
Gigantic Whale: The Greenland Whale (or Baloena Musculus), Blue Whale, Balaenoptera musculus (Linnaeus,1758) (1832) by George… Free from public domain license 
Ultrastructural morphology shown by coronavirus. Original image sourced from US Government department: Public Health Image… Free Photo from public domain license 
Ultrastructural morphology exhibited by coronaviruses similar to COVID-19 which became pandemic. Original image sourced from… Free Photo from public domain license 
St. Louis Red Cross Motor Corps on duty during influenza epidemic (1918). Original from Library of Congress. Digitally… Free from public domain license 
Trochilidae–Kolibris from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress. Digitally… Free from public domain license 
Masks worn during experiments with plague. Manila, Philippines (1912). Original image from National Museum of Health and… Free Photo from public domain license 
Ascidiae–Seescheiden from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress. Digitally… Free from public domain license 
Emergency hospital during influenza epidemic, Camp Funston, Kansas (1918). Original image from National Museum of Health and… Free Photo from public domain license 
The American Soldiers in Presence of Gas during World War I (1918). Original image from National Museum of Health and… Free Photo from public domain license 
Space Travel Poster (2015). Original from Official SpaceX Photos. Digitally enhanced by rawpixel. Free from public domain license 
Sempervivum Canariense Image from Histoire des Plantes Grasses (1799) by Pierre-Joseph Redouté. Original from… Free from public domain license 
Rozen by Margaretha Roosenboom (1853 –1896). Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free from public domain license 
Cranes from Momoyogusa–Flowers of a Hundred Generations (1909) by Kamisaka Sekka. Original from the The New York Public… Free from public domain license 
Insects and Flowers (Qing dynasty ca. 1644–1911) by Ju Lian. Original from The Getty. Digitally enhanced by rawpixel. Free from public domain license 
Women wearing surgical masks during the influenza epidemic, Brisbane (1919). Original image from State Library of Queensland.… Free Photo from public domain license 
Star-glory Morning–glory (1827) by Pierre-Joseph Redouté and Henry Joseph Redouté. Original from The… Free from public domain license 
The Kiss (1895) by Edvard Munch. Original from The MET Museum. Digitally enhanced by rawpixel. Free from public domain license 
Cerfs et arbres, papier peint. Écureuil oiseaux et sorbier, bordure from L'animal dans la décoration (1897)… Free from public domain license 
Orchideae–Denusblumen / A. Giltsch, gem from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of… Free from public domain license 
Walter Reed Hospital flu ward (ca. 1910–1920). Original from Library of Congress. Digitally enhanced by rawpixel. Free from public domain license 
Mount Fuji from Momoyogusa–Flowers of a Hundred Generations (1909) by Kamisaka Sekka. Original from the The New York… Free from public domain license 
Mäda Primavesi (ca. 1912–1913) by Gustav Klimt. Original from The MET Museum. Digitally enhanced by rawpixel. Free from public domain license 
American Red Cross canteen workers taking food for family infected with the flu, Charlotte, North Carolina (1918). Original… Free from public domain license 
Scarlet Ibis with an Egg (1699–1700) by Maria Sibylla Merian. Original from The Rijksmuseum. Digitally enhanced by… Free from public domain license 
The American Soldiers in Presence of Gas suring World War I (1918). Original image from National Museum of Health and… Free Photo from public domain license 
Noua, et integra uniuersi orbis descriptio (1531) by Oronce Finé. Original from Library of Congress. Digitally… Free from public domain license 
Siphonophorae–Staatsquallen from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress.… Free from public domain license 
Baby (Cradle) (ca. 1917–1918) by Gustav Klimt. Original from The National Gallery of Art. Digitally enhanced by… Free from public domain license 
Sand dunes in Southern California. Original image from Carol M. Highsmith’s America, Library of Congress collection.… Free Photo from public domain license 
Card Depicting Flowers in Blue Background (1865–1899) by L. Prang & Co. Original from The New York Public Library.… Free from public domain license 
Nova totius terrarum orbis geographica ac hydrographica tabula (1635–1649) by Jan Aertse van den Ende. Original from… Free from public domain license 
Passiflore Ailee (1827) by Pierre-Joseph Redouté and Henry Joseph Redouté. Original from The Cleveland Museum… Free from public domain license 
Adiantum Assimile and A. Lunulatum from Ferns: British and Exotic (1856-1860) by Edward Joseph Lowe. Original from… Free from public domain license 
Deer from Momoyogusa–Flowers of a Hundred Generations (1909) by Kamisaka Sekka. Original from the The New York Public… Free from public domain license 
Novel Coronavirus SARS-CoV-2–
This scanning electron microscope image shows SARS-CoV-2 (yellow)—also known as… Free Photo from public domain license 
Leptomedusae–Faltenquallen from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress.… Free from public domain license 
Chest X–ray of patient with influenza during World War I. Original image from National Museum of Health and Medicine.… Free Photo from public domain license 
Camellia: No. 171 from Iconographie du Genre Camellia ou Description et Figures (1839–1843) by Lorenzo Berlèse.… Free from public domain license 
Cactus Cochenillifer Image from Histoire des Plantes Grasses (1799) by Pierre-Joseph Redouté. Original from… Free from public domain license 
Volunteer nurses from The American red cross during flu epidemic (1918). Original image from Oakland Public Library.… Free Photo from public domain license 
Noordpool (ca. 1869–1907) by Nijgh & Van Ditmar. Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free from public domain license 
Scientist testing with coronavirus through test tubes. Original image sourced from US Government department: Public Health… Free Photo from public domain license 
Insects and Fruits (1660–1665) by Jan van Kessel. Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free from public domain license 
Woman using a damp sponge to clean dust collected on a window sill. Original image sourced from US Government department:… Free Photo from public domain license 
Bowles's new pocket map of the world: laid down from the latest observations and comprehending the new discoveries to the… Free from public domain license 
Columbine, Marigold and Pheasant's Eye from The Language of Flowers, or, Floral Emblems of Thoughts, Feelings, and Sentiments… Free from public domain license 
Interior of a hospital ward at the Base Hospital, Camp Jackson, South Carolina, during the influenza epidemic (1918).… Free Photo from public domain license 
Reproduction of the "Ladies in Blue" fresco
ca. 1525–1450 B.C. by Emile Gilliéron. Original from The MET Museum.… Free from public domain license 
Plattegrond van Parijs (ca. 1721–1774) by Guillaume Delisle. Original from The Rijksmuseum. Digitally enhanced by… Free from public domain license 
清 佚名 台南地區荷蘭城堡 Forts Zeelandia and Provintia and the City of Tainan (ca. 1900s) by anonymous. Original from The MET Museum.… Free from public domain license 
Discomedusae–Schweibenquallen from Kunstformen der Natur (1904) Ernst Haeckel. Original from Library of Congress.… Free from public domain license 
Antilopina–Antilopen from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress. Digitally… Free from public domain license 
Oiseaux. Libellules. Mouches. Chauve-souris. Écureuils et noisettes. Cygnes, bordures from L'animal dans la… Free from public domain license 
Cygne sauvage from L'animal dans la décoration (1897) illustrated by Maurice Pillard Verneuil. Original from the The… Free from public domain license 
Woman using a damp sponge to clean dust collected on a window sill. Original image sourced from US Government department:… Free Photo from public domain license 
Orbis terrae compendiosa descriptio : quam ex magna universali Gerardi Mercatoris Domino Richardo Gartho, geographie ac… Free from public domain license 
Scientist removes cell growth medium from a 6–well plate in preparation for a plaque assay, which is a test that allows… Free Photo from public domain license 
Healthcare workers donning a pair of protective goggles and protective equipment. Original image sourced from US Government… Free Photo from public domain license 
Grandmother properly cleaning fresh, uncooked produce under a running tap. Original image sourced from US Government… Free Photo from public domain license 
Thalamophora–Kammerlinge from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress.… Free from public domain license 
Acrostichum Alienum from Ferns: British and Exotic (1856-1860) by Edward Joseph Lowe. Original from Biodiversity Heritage… Free from public domain license 
Aloe Ferox Image from Histoire des Plantes Grasses (1799) by Pierre-Joseph Redouté. Original from Biodiversity… Free from public domain license 
Stephoidea–Ringelstrahlinge from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress.… Free from public domain license 
A 3D graphic representation of a spherical-shaped, measles virus particle, that was studded with glycoprotein tubercles.… Free Photo from public domain license 
Bacon's standard map of Europe by George Washington Bacon (1830–1922). Original from Library of Congress. Digitally… Free from public domain license 
A worker wearing a protective mask and suit. Original image sourced from US Government department: Public Health Image… Free Photo from public domain license 
Four diagrams of Solar eclipses (1711) by Johannes Buno. Original from Library of Congress. Digitally enhanced by rawpixel. Free from public domain license 
Green mountains from Momoyogusa–Flowers of a Hundred Generations (1909) by Kamisaka Sekka. Original from the The New… Free from public domain license 
Siberian apple by Mary Altha Nims (1817–1907). Original from The Cleveland Museum of Art. Digitally enhanced by… Free from public domain license 
Achillea Clypeolata (Yarrow) enlarged 15 times from Urformen der Kunst (1928) by Karl Blossfeldt. Original from The… Free Photo from public domain license 
Asteridea–Seesterne from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress. Digitally… Free from public domain license 
MERS Coronavirus Particles–Colorized transmission electron micrograph showing particles of the Middle East respiratory… Free Photo from public domain license 
Iris Pumila from The genus Iris by William Rickatson Dykes (1877-1925). Original from The Biodiversity Heritage Library.… Free from public domain license 
Whitbread's new plan of London: drawn from authentic survey (1853) by J. Whitbread. Original from Library of Congress.… Free from public domain license 
Lab technician adding a solution to an Enzyme–Linked Immunosorbent Assay (ELISA) plate Original image sourced from US… Free Photo from public domain license 
Image of a nebula taken using a NASA telescope -
Original from NASA. Digitally enhanced by rawpixel. Free Photo from public domain license 
New York City, photographed from two miles up in the air (1922) from The Lionel Pincus and Princess Firyal Map Division.… Free from public domain license 
MERS Coronavirus Particle–Middle East Respiratory Syndrome Coronavirus particle envelope proteins immunolabeled with… Free Photo from public domain license 
Edwin Aldrin walking on the lunar surface. Neil Armstrong, who took the photograph, can be seen reflected in Aldrin’s… Free Photo from public domain license 
Frost from Momoyogusa–Flowers of a Hundred Generations (1909) by Kamisaka Sekka. Original from the The New York Public… Free from public domain license 
This photo was assembled from three black and white negatives by the Image Processing Lab at Jet Propulsion Laboratory.… Free Photo from public domain license 
Pappagallo detto arara rossa del Brasile (Macaw) by Saverio Manetti (1723–1785). Original from The Beinecke Rare Book &… Free from public domain license 
Up-to-date map of the world war (1942) by Manila Shinbun-sha. Original from The Beinecke Rare Book & Manuscript Library.… Free from public domain license 
Clinical photograph of a cyst of conjunctiva. Original image from National Museum of Health and Medicine. Digitally enhanced… Free Photo from public domain license 
Warming Seas and Melting Ice Sheets. Original from NASA. Digitally enhanced by rawpixel. Free Photo from public domain license 
Snow from Momoyogusa–Flowers of a Hundred Generations (ca. 1909–1910) by Kamisaka Sekka. Original from the The… Free from public domain license 
Maple from Momoyogusa–Flowers of a Hundred Generations (ca. 1909–1910) by Kamisaka Sekka. Original from the The… Free from public domain license 
A medical illustration of drug–resistant, Neisseria gonorrhoeae bacteria. Original image sourced from US Government… Free Photo from public domain license 
Map of Zeppelin and aeroplane bombs on London. From: World War I photograph album (1919) by Herbert Green. Original from… Free from public domain license 
Schematismus geographiae mathematicae, id est repraesentatio (1753) by Johann Baptista Homann. Original from The Rijksmuseum.… Free from public domain license 
Ultrastructural morphology shown by coronavirus. Original image sourced from US Government department: Public Health Image… Free Photo from public domain license