Picture credits

The photographs, paintings and illustrations in the app that come from elsewhere, with who made them and the licence that lets us show them. The diagrams and animations are drawn for this app.

Biology

Alveoli by NIH NIAID, CC BY 4.0. Source
Antibiotic by Sommer36, CC BY-SA 4.0. Source
Antibody by Servier Medical Art, CC BY 4.0. Source
Aspirin by Andreas Plank, CC BY-SA 3.0. Source
Benedict's test by Thebiologyprimer, CC0. Source
Biological valve by Stif Komar, CC BY-SA 3.0. Source
Biuret test by Ozone aurora/Philip Evans, CC BY-SA 3.0. Source
Chromosome by Josef Reischig, CC BY-SA 3.0. Source
Cilia by Phage1990, CC BY 4.0. Source
Coronary heart disease by Servier Medical Art, CC BY 4.0. Source
Digitalis by Robert Flogaus-Faust, CC BY 4.0. Source
Embryonic stem cell by Id711 at English Wikipedia, public domain. Source
Epithelial tissue by Servier Medical Art, CC BY 4.0. Source
Fermentation by Masur, public domain. Source
Gill filaments by Syced, CC0. Source
Gonorrhoea by NIAID, CC BY 2.0. Source
HIV by Servier Medical Art, CC BY 4.0. Source
Iodine test by Mezhenskyj, CC BY-SA 4.0. Source
Malaria by CDC/Dr Mae Melvin, public domain. Source
Measles by CDC/Cynthia S. Goldsmith, public domain. Source
Mechanical valve by scientificanimations.com, CC BY-SA 4.0. Source
Meristem by Berkshire Community College Bioscience Image Library, CC0. Source
Mitosis by Servier Medical Art, CC BY 4.0. Source
MRSA by NIAID, CC BY 2.0. Source
Organ system by Servier Medical Art, CC BY 4.0. Source
Pacemaker by Servier Medical Art, CC BY 4.0. Source
Penicillin by Crulina 98, CC BY-SA 3.0. Source
Plasmid by Servier Medical Art, CC BY 4.0. Source
Plasmolysis by Mnolf, CC BY-SA 3.0. Source
Platelet by Servier Medical Art, CC BY 4.0. Source
Prokaryotic cell by Servier Medical Art, CC BY 4.0. Source
Red blood cell by Servier Medical Art, CC BY 4.0. Source
Root hair cell by RIT RAJARSHI, CC BY-SA 4.0. Source
Rose black spot by giantcicada, CC BY 4.0. Source
Salmonella by Rocky Mountain Laboratories, NIAID, NIH, public domain. Source
SEM (scanning electron microscope) by Dartmouth Electron Microscope Facility, Dartmouth College, public domain. Source
Starch by Makergreen, CC BY 4.0. Source
Stent by Food and Drug Administration, public domain. Source
TEM (transmission electron microscope) by US Department of Health and Human Services/NIH, public domain. Source
Vaccination by Servier Medical Art, CC BY 4.0. Source
Vector by CDC/Jim Gathany, public domain. Source
Villi by Servier Medical Art, CC BY 4.0. Source
White blood cell by Servier Medical Art, CC BY 4.0. Source

Chemistry

Acid rain by Lovecz, public domain. Source
Alkali metals by W. Oelen, CC BY-SA 3.0. Source
Anaerobic digestion by Marcos von Sperling, CC BY-SA 4.0. Source
Battery by ajay_suresh, CC BY 2.0. Source
Borosilicate glass by Skatebiker, public domain. Source
Brass by Splarka, public domain. Source
Bromine water by CoolGuychm, CC0. Source
Bronze by Palauenc05, CC BY-SA 4.0. Source
Carat by Unknown, public domain. Source
Catalytic converter by Cyrogigabyte, CC0. Source
Ceramic by Unknown, CC BY-SA 4.0. Source
Composite by Andrew Hrechuk, CC BY 4.0. Source
Condenser by Leprof 7272, CC BY-SA 4.0. Source
Crude oil by Glasbruch2007, CC BY-SA 3.0. Source
Crystallisation by Crystal Titan, CC BY-SA 4.0. Source
Filtration by LucaMok, CC BY-SA 4.0. Source
Flame test by Hegelrast, CC BY-SA 4.0. Source
Fractionating column by Chemie-Verbände Baden-Württemberg, CC BY 2.0. Source
Galvanising by Splarka, public domain. Source
Gas syringe by User:Geni, CC BY-SA 3.0. Source
Halogens by W. Oelen, CC BY-SA 3.0. Source
Indicator by AgrisR, CC BY-SA 4.0. Source
Limestone by Ingolfson, public domain. Source
Line spectrum by Umop503, CC0. Source
Ore by Darla Sondrol, CC0. Source
Particulates by Eltiempo10, CC BY-SA 4.0. Source
Pipette by Akshaya govindasamy, CC BY-SA 4.0. Source
Precipitate by MS Sakib, CC BY-SA 4.0. Source
Recycling by Peulle, CC0. Source
Rusting by Laitr Keiows, CC BY-SA 3.0. Source
Sacrificial protection by Zwergelstern, CC BY-SA 3.0. Source
Soda-lime glass by George Chernilevsky, public domain. Source
Thermosetting polymer by Izzy from Montreal, Canada, CC BY 2.0. Source
Thermosoftening polymer by Grendelkhan, CC BY-SA 4.0. Source
Titration by Ivan Akira, CC BY-SA 3.0. Source
Transition metals by Frey Saori, CC BY-SA 3.0. Source
Volcanic activity by NASA (ISS crew), CC BY 2.0. Source
Water bath by QuodScripsiScripsi, CC0. Source

Physics

Artificial satellite by NASA, public domain. Source
Big Bang theory by NASA, public domain. Source
Dosimeter by Prolineserver, CC BY-SA 3.0. Source
Dwarf planet by NASA/Johns Hopkins University Applied Physics Laboratory, public domain. Source
Dynamo by Santeri Viinamäki, CC BY-SA 4.0. Source
Electromagnet by MikeRun, CC BY-SA 4.0. Source
Fossil fuel by Nostrifikator, CC BY-SA 3.0. Source
Galaxy by NASA/JPL-Caltech, public domain. Source
Gear by Jared C. Benedict (user Redjar), CC BY-SA 3.0. Source
Geiger–Müller tube by TimVickers, public domain. Source
Geothermal energy by Gretar Ívarsson, public domain. Source
Hydro-electricity by Lijovklm, CC BY-SA 4.0. Source
Leslie cube by Pieter Kuiper, public domain. Source
Measuring cylinder by Jeremyida002, CC BY-SA 4.0. Source
Milky Way by Giles Laurent, CC BY-SA 4.0. Source
National Grid by Kkiefuik, CC BY 4.0. Source
Natural satellite by NASA, public domain. Source
Newtonmeter by Bestalex, CC0. Source
Nuclear fuel by US Department of Energy, public domain. Source
Planet by NASA/JPL/Space Science Institute, public domain. Source
Ripple tank by MikeRun, CC BY-SA 4.0. Source
Solar power by Wikideas1, CC0. Source
Solar System by NASA, public domain. Source
Solenoid by Zureks, public domain. Source
Sublimation by Ибрагим Хаётов, CC BY 4.0. Source
Tidal power by Tswgb, public domain. Source
Transformer by Rept0n1x, CC BY-SA 3.0. Source
Transmission cables by Gomera-b, CC BY-SA 4.0. Source
Wind power by Kim Hansen, CC BY-SA 3.0. Source

Geography

Headland by Nadia308, CC BY-SA 2.0. Source
Landslide by USGS Landslide Hazards Program, public domain. Source
Moraine by John Calvin Reed, public domain. Source
Sand dune by Jengod, CC BY-SA 4.0. Source

History

Arms race by US Air Force, public domain. Source
Bayeux Tapestry by Unknown embroiderers, 1070s, public domain. Source
Berlin Airlift by US Air Force, public domain. Source
Berlin Wall by US National Archives, public domain. Source
Berliners watching an airlift plane by US Air Force, Public domain: a work of the US Air Force. Source
Blind-Man's Buff by John Tenniel, Public domain: dedicated to the public domain (CC0) by the British Library. Source
Bow Street Runners by Thomas Rowlandson and Augustus Pugin, public domain. Source
Checkpoint Charlie by CIA, public domain. Source
Domesday Book by Unknown, 1086, public domain. Source
Gunpowder Plot by Crispijn van de Passe the Elder, public domain. Source
Hyperinflation by Reichsbank, public domain. Source
Lodging house by From Henry Mayhew, London Labour and the London Poor, public domain. Source
Map of Whitechapel by Charles Booth, Public domain. Source
Marshall Plan by E. Spreckmeester, public domain. Source
Oath by Unknown embroiderers, 1070s, public domain. Source
Pentonville by Illustrated London News, public domain. Source
Pillory by Thomas Rowlandson and Augustus Pugin, public domain. Source
Punch by John Tenniel, public domain. Source
Rookery by Gustave Doré, public domain. Source
Sanctuary by Godfrey Bingley, public domain. Source
The Bayeux Tapestry: Harold's oath by Unknown embroiderers, Public domain: the photographer released this photograph of the tapestry into the public domain. Source
The Bayeux Tapestry: the death of Harold by Unknown embroiderers, Public domain: the photographer released this photograph of the tapestry into the public domain. Source
U-2 photograph of a missile site in Cuba by US Air Force, Public domain: a work of the US Air Force. Source
Vigilance Committee by R. Taylor, after M. Brown, public domain. Source
Witchfinder General by Anonymous, 1647, public domain. Source
With the Vigilance Committee in the East-End by R. Taylor, after M. Brown, Public domain. Source
Workhouse by J. J. Bateman (architect), public domain. Source