Image credits and licences

Every photograph, micrograph and historical plate on this site is either in the public domain or published under a Creative Commons Attribution licence. Each one is listed below with its author, the page it came from, the licence it carries, and any change we made to it. Drawn diagrams and charts are our own work.

• A phylogenetic tree of dog breeds — Tulumnes. Source, CC BY 4.0. Served at 1200x643 from the 1798x964 original. Resized from 1798×964 to 1200×643 and re-encoded as JPEG for the web.
• Chloroplasts inside living moss cells — Original: Kelvinsong Labels: IsadoraofIbiza with labels: Sapphaline. Source, CC BY 3.0. Served at 1200x654 from the 2200x1200 original. Resized from 1920×1047 to 1200×654 and re-encoded as JPEG for the web.
• Onion root tip cells caught at different stages of division — UAF Center for Distance Education. Source, CC BY 2.0. Re-encoded as JPEG for the web (1002 KB to 211 KB).
• Chromosome-symbol pair for Rob — OpenSciEd · 8.5 Genetics, Lesson 6 chromosome model. Source, CC BY 4.0. Figure excerpt only: page 1, PDF rectangle [68, 340, 216, 536]. Rendered at 8× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Chromosome-symbol pair for Yukia — OpenSciEd · 8.5 Genetics, Lesson 6 chromosome model. Source, CC BY 4.0. Figure excerpt only: page 2, PDF rectangle [68, 340, 216, 536]. Rendered at 8× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Historical US corn and soybean planted acreage — OpenSciEd · 7.5 Ecosystem Dynamics, Lesson 10 graph; data source retained in image. Source, CC BY 4.0. Figure excerpt only: page 7, PDF rectangle [290, 252, 553, 405]. Rendered at 4× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Historical Masai giraffe observations in Kenya — OpenSciEd · 7.5 Ecosystem Dynamics, Lesson 10 graph; data source retained in image. Source, CC BY 4.0. Figure excerpt only: page 4, PDF rectangle [119, 456, 491, 669]. Rendered at 4× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Historical American tree sparrow abundance indicator — OpenSciEd · 7.5 Ecosystem Dynamics, Lesson 10 graph; data source retained in image. Source, CC BY 4.0. Figure excerpt only: page 7, PDF rectangle [272, 450, 570, 620]. Rendered at 4× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Brussels sprouts growing on the stem — Nick Saltmarsh from London, UK. Source, CC BY 2.0. Served at 1100x825 from the 3648x2736 original. Resized from 1920×1440 to 1100×825 and re-encoded as JPEG for the web.
• A single-celled alga in a transmission electron micrograph — Mohammad Moniruzzaman, Maria P. Erazo-Garcia, Frank O. Aylward. Source, CC BY 4.0. Served at 1200x830 from the 1774x1227 original. Resized from 1774×1227 to 1200×830 and re-encoded as JPEG for the web.
• Gould's drawings of Galapagos finches — John Gould, 1845, from the Voyage of the Beagle. Source, Public domain. Served at 1200x905 from the 1748x1319 original. Resized from 1748×1319 to 1200×905 and re-encoded as JPEG for the web.
• Escherichia coli at 10,000× — Photo by Eric Erbe, digital colorization by Christopher Pooley, both of USDA, ARS, EMU.. Source, Public domain. Served at 1400x1018 from the 2598x1889 original. Resized from 1920×1396 to 1400×1018 and re-encoded as JPEG for the web.
• Elodea leaf cells under a light microscope — Lilyviolet. Source, CC BY 4.0. Served at 1100x1338 from the 2448x3264 original. Cropped to the 1167x1420 field of view. Resized from 1167×1420 to 1100×1338 and re-encoded as JPEG for the web.
• A fossil shell — Wilson44691 at English Wikipedia. Source, Public domain. Resized from 1230×1227 to 1000×998 and re-encoded as JPEG for the web.
• Hooke's engraving of cork, Micrographia (1665) — Robert Hooke, Micrographia (1665); scanned by Wellcome Collection. Source, CC BY 4.0. Served at 1000x1464 from the 2697x3947 original. Resized from 1920×2810 to 1000×1464 and re-encoded as JPEG for the web.
• A human karyotype, 46 chromosomes in 23 pairs — Courtesy: National Human Genome Research Institute. Source, Public domain. Served at 1200x941 from the 3084x2417 original. Resized from 1920×1505 to 1200×941 and re-encoded as JPEG for the web.
• A kelp forest — oliver.dodd. Source, CC BY 2.0. Served at 1200x799 from the 4256x2832 original. Resized from 1920×1278 to 1200×799 and re-encoded as JPEG for the web.
• A multipolar neuron — BruceBlaus, Blausen Medical. Source, CC BY 3.0. Served at 1200x774 from the 2500x1612 original. Resized from 1920×1238 to 1200×774 and re-encoded as JPEG for the web.
• Filtration, reabsorption and secretion along a nephron — OpenStax College, Anatomy & Physiology. Source, CC BY 3.0. Resized from 1138×2171 to 1000×1908 and re-encoded as JPEG for the web.
• Onion cells after water returns — Kristina Tsimlyakowa. Source, CC BY 4.0. Served at 1200x674 from the 2592x1456 original. Resized from 1920×1079 to 1200×674 and re-encoded as JPEG for the web.
• Onion epidermis under a light microscope, 40× — loganrickert. Source, CC BY 2.0. Served at 1400x1050 from the 2560x1920 original. Resized from 1920×1440 to 1400×1050 and re-encoded as JPEG for the web.
• Onion root tip cells dividing, 20× — UAF Center for Distance Education. Source, CC BY 2.0. Re-encoded as JPEG for the web (1002 KB to 211 KB).
• Paramecium caudatum, a single-celled organism — MTadey. Source, CC BY 4.0. Served at 1400x1050 from the 3264x2448 original. Resized from 1920×1440 to 1400×1050 and re-encoded as JPEG for the web.
• A sea urchin — Author not recorded on Commons; released into the public domain. Source, Public domain. Resized from 1273×843 to 900×596 and re-encoded as JPEG for the web.
• Seeds of many species — Alexander Klepnev. Source, CC BY 4.0. Served at 1200x1029 from the 5600x4800 original. Resized from 1920×1646 to 1200×1029 and re-encoded as JPEG for the web.
• Skeletal muscle fibres — OpenStax College, Anatomy & Physiology. Source, CC BY 4.0. Used unchanged.
• Villi of the small intestine in cross-section — Mikael Häggström, M.D. Author info - Reusing images- Conflicts of interest: None Mikael Häggström, M.D.Consent note: Consent from the patient or patient's relatives is regarded as redundant, because of absence of identifiable features (List of HIPAA identifiers) in the media and case information (See also HIPAA case reports guidance).. Source, CC0. Served at 1200x898 from the 2048x1532 original. Resized from 1920×1436 to 1200×898 and re-encoded as JPEG for the web.
• Snow's map of cholera deaths in Soho, 1854 — John Snow, 1854; scanned by Wellcome Collection. Source, CC BY 4.0. Served at 1200x1349 from the 3047x3426 original. Resized from 1920×2159 to 1200×1349 and re-encoded as JPEG for the web.
• A soil profile showing distinct layers — Rivadavia.vila. Source, CC0. Served at 1000x1333 from the 3456x4608 original. Resized from 1920×2560 to 1000×1333 and re-encoded as JPEG for the web.
• A coprolite — fossilised droppings — United States Geological Survey. Source, Public domain. Served at 1000x667 from the 1536x1024 original. Resized from 1536×1024 to 1000×667 and re-encoded as JPEG for the web.
• Stomata on the underside of a leaf — AioftheStorm. Source, CC0. Resized from 1280×1024 to 1200×960 and re-encoded as JPEG for the web.
• The electromagnetic spectrum — NASA. Source, Public domain. Served at 1300x848 from the 2750x1793 original. Resized from 1920×1252 to 1300×848 and re-encoded as JPEG for the web.
• Iron filings revealing a magnetic field — Newton Henry Black, Practical Physics (1913). Source, Public domain. Resized from 1106×751 to 1100×747 and re-encoded as JPEG for the web.
• Bath-bomb matter model at visible and particle scales — OpenSciEd · 7.1 Chemical Reactions & Matter, Lesson 1. Source, CC BY 4.0. Figure excerpt only: page 1, PDF rectangle [223, 162, 657, 499]. Rendered at 4× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Coil and magnet before force arrows are added — OpenSciEd · 8.3 Forces at a Distance, Lesson 2. Source, CC BY 4.0. Figure excerpt only: page 2, PDF rectangle [579, 144, 667, 221]. Rendered at 8× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Inverted triangular stack of cushioning rings — OpenSciEd · 8.1 Contact Forces, Lesson 13. Source, CC BY 4.0. Figure excerpt only: page 1, PDF rectangle [168, 533, 255, 618]. Rendered at 8× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• One ring between a plate and a table — OpenSciEd · 8.1 Contact Forces, Lesson 13. Source, CC BY 4.0. Figure excerpt only: page 1, PDF rectangle [168, 183, 255, 233]. Rendered at 8× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Triangular stack of cushioning rings — OpenSciEd · 8.1 Contact Forces, Lesson 13. Source, CC BY 4.0. Figure excerpt only: page 1, PDF rectangle [168, 420, 255, 506]. Rendered at 8× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Three rings sharing a load — OpenSciEd · 8.1 Contact Forces, Lesson 13. Source, CC BY 4.0. Figure excerpt only: page 1, PDF rectangle [168, 341, 255, 393]. Rendered at 8× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Two rings sharing a load — OpenSciEd · 8.1 Contact Forces, Lesson 13. Source, CC BY 4.0. Figure excerpt only: page 1, PDF rectangle [168, 262, 255, 313]. Rendered at 8× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Particles leaving a liquid during evaporation — OpenSciEd · 6.2 Thermal Energy, Lesson 15. Source, CC BY 4.0. Figure excerpt only: page 1, PDF rectangle [369, 457, 524, 675]. Rendered at 8× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Gas-bottle model: room temperature, cooling and warming — OpenSciEd · 6.3 Weather, Climate & Water Cycling, Lesson 5. Source, CC BY 4.0. Figure excerpt only: page 1, PDF rectangle [132, 410, 480, 681]. Rendered at 4× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Glass structure in a light model — OpenSciEd · 6.1 Light & Matter, Lesson 4. Source, CC BY 4.0. Figure excerpt only: page 1, PDF rectangle [391, 541, 524, 675]. Rendered at 8× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Flameless-heater model at visible and particle scales — OpenSciEd · 7.2 Chemical Reactions & Energy, Lesson 1. Source, CC BY 4.0. Figure excerpt only: page 1, PDF rectangle [35, 240, 578, 698]. Rendered at 4× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Two-room light-path model — OpenSciEd · 6.1 Light & Matter, Lesson 2. Source, CC BY 4.0. Figure excerpt only: page 1, PDF rectangle [139, 215, 451, 421]. Rendered at 4× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Light-sensor positions for incoming, reflected and transmitted light — OpenSciEd · 6.2 Thermal Energy, Lesson 8. Source, CC BY 4.0. Figure excerpt only: page 5, PDF rectangle [95, 225, 518, 447]. Rendered at 4× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Continuous coating on an ordinary mirror — OpenSciEd · 6.1 Light & Matter, Lesson 4. Source, CC BY 4.0. Figure excerpt only: page 1, PDF rectangle [391, 205, 524, 338]. Rendered at 8× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Mirror, one-way mirror and glass at a microscopic scale — OpenSciEd · 6.1 Light & Matter, Lesson 4. Source, CC BY 4.0. Figure excerpt only: page 2, PDF rectangle [95, 174, 524, 413]. Rendered at 4× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Partial coating on a one-way mirror — OpenSciEd · 6.1 Light & Matter, Lesson 4. Source, CC BY 4.0. Figure excerpt only: page 1, PDF rectangle [391, 381, 524, 514]. Rendered at 8× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Sound-source vibration graph A — OpenSciEd · 8.2 Sound Waves, Lesson 5. Source, CC BY 4.0. Figure excerpt only: page 1, PDF rectangle [323, 174, 518, 318]. Rendered at 8× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Sound-source vibration graph B — OpenSciEd · 8.2 Sound Waves, Lesson 5. Source, CC BY 4.0. Figure excerpt only: page 1, PDF rectangle [323, 349, 518, 495]. Rendered at 8× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Sound-source vibration graph C — OpenSciEd · 8.2 Sound Waves, Lesson 5. Source, CC BY 4.0. Figure excerpt only: page 1, PDF rectangle [323, 524, 518, 671]. Rendered at 8× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Corroded iron on a bridge — Anna Frodesiak. Source, CC0. Served at 1100x825 from the 4000x3000 original. Resized from 1920×1440 to 1100×825 and re-encoded as JPEG for the web.
• Columnar jointing in basalt — Richard Allaway. Source, CC BY 2.0. Served at 1000x667 from the 4752x3168 original. Resized from 1920×1280 to 1000×667 and re-encoded as JPEG for the web.
• The Crab Nebula, remnant of a supernova — NASA, ESA, J. Hester and A. Loll, Arizona State University. Source, Public domain. Served at 1000x1000 from the 3864x3864 original. Resized from 1920×1920 to 1000×1000 and re-encoded as JPEG for the web.
• A cumulonimbus cloud — National Oceanic and Atmospheric Administration. Source, Public domain. Served at 1200x783 from the 1840x1200 original. Resized from 1840×1200 to 1200×783 and re-encoded as JPEG for the web.
• Columns of gas and dust where stars form — NASA, Jeff Hester and Paul Scowen, Arizona State University. Source, Public domain. Served at 1000x986 from the 2434x2400 original. Resized from 1920×1893 to 1000×986 and re-encoded as JPEG for the web.
• Earth photographed from lunar orbit — NASA, Apollo 8. Source, Public domain. Served at 1100x880 from the 3000x2400 original. Resized from 1920×1536 to 1100×880 and re-encoded as JPEG for the web.
• Horizontal sedimentary layers exposed in a butte — Kent G. Budge. Source, CC0. Served at 1200x900 from the 2816x2112 original. Resized from 1920×1440 to 1200×900 and re-encoded as JPEG for the web.
• The Hubble Extreme Deep Field — NASA, ESA and the Hubble Extreme Deep Field team. Source, Public domain. Served at 1200x1047 from the 2382x2078 original. Resized from 1920×1675 to 1200×1047 and re-encoded as JPEG for the web.
• World relief and the Himalayan region — NOAA relief map; OpenSciEd · 6.4 Plate Tectonics & Rock Cycling, Lesson 1 annotation/layout. Source, CC BY 4.0. Figure excerpt only: page 2, PDF rectangle [35, 55, 754, 463]. Rendered at 4× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• Observed station weather in the Fort Scott case — OpenSciEd · 6.3 Weather, Climate & Water Cycling, Lesson 2. Source, CC BY 4.0. Figure excerpt only: page 2, PDF rectangle [36, 107, 504, 451]. Rendered at 4× resolution; resized to at most 1400 px and encoded as JPEG. Labels and scientific content unchanged.
• An unconformity between Precambrian and Cambrian rock — Unknown. Source, CC BY 2.0. Used unchanged.
• The San Andreas Fault from the air — John Wiley User:Jw4nvc - Santa Barbara, California. Source, CC BY 3.0. Used unchanged.
• Age of the ocean floor — National Oceanic and Atmospheric Administration. Source, Public domain. Served at 1300x817 from the 1624x1020 original. Resized from 1624×1020 to 1300×817 and re-encoded as JPEG for the web.
• The planets of the Solar System — NASA / Jet Propulsion Laboratory. Source, Public domain. Served at 1100x1369 from the 4500x5600 original. Resized from 1920×2389 to 1100×1369 and re-encoded as JPEG for the web.
• A topographic map with contour lines — Etan Tal. Source, Public domain. Resized from 1233×1656 to 1000×1343 and re-encoded as JPEG for the web.

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