Credits

Last updated: 7 October 2026

KnowSoda is made by Basalt Works, Tarragona, Spain. These are the people and works it builds on.

Art

Soda, the wardrobe, the medals, the card illustrations and the icons are pixel art drawn for KnowSoda. The pictures on the stories are explained below.

Fonts

• KnowSoda Pixel, our version of Pixelify Sans with clearer 1, 2, 5 and 7. Pixelify Sans © 2021 The Pixelify Sans Project Authors, under the SIL Open Font License 1.1, as is our version.
• IBM Plex Mono © IBM Corp., under the SIL Open Font License 1.1.

Software

The app is built with open-source software, including React Native and Expo, under the MIT licence. Thank you to everyone who makes it.

Story pictures

Every subject has an illustrated story. Each picture is a pixel-art version of a public-domain or CC0 work, most of them found on Wikimedia Commons, or an image generated with AI for KnowSoda. None of them needs attribution, but we credit them gladly.

• Numbers & ArithmeticThe Merchant’s Son and the DigitsUnknown artist, 19th century · Public domain · Wikimedia Commons
• AlgebraThe Quick SumChristian Albrecht Jensen, 1840 · Public domain · Wikimedia Commons
• GeometryDon’t Disturb My CirclesThomas Degeorge, 1815 · Public domain · Wikimedia Commons
• Probability & StatisticsA Gambler’s QuestionUnknown artist, after François II Quesnel, 17th century · Public domain · Wikimedia Commons
• LogicLet Us Calculate!Christoph Bernhard Francke, c. 1695 · Public domain · Wikimedia Commons
• Famous Problems & ParadoxesAlways SwitchGenerated with AI for KnowSoda, 2026 · Own work
• Motion & ForcesThe Apple and the MoonGodfrey Kneller, 1689 · Public domain · Wikimedia Commons
• Energy & HeatThe Brewer Who Weighed HeatJacob Abbott (Harper’s), 1869 · Public domain · Wikimedia Commons
• Electricity & MagnetismA Kite in the StormBenjamin West, c. 1816 · Public domain · Wikimedia Commons
• Light & SoundThe Moon That Ran LateJacob Coning, c. 1700 · Public domain · Wikimedia Commons
• RelativityLights All AskewFrank Dyson, Arthur Eddington and Charles Davidson, 1919 · Public domain · Wikimedia Commons
• Quantum PhysicsThe Quantum QuarrelBenjamin Couprie, 1927 · Public domain · Wikimedia Commons
• Atoms & the Periodic TableThe Shell That Bounced BackBain News Service, c. 1910s · Public domain · Wikimedia Commons
• Chemical ReactionsThe Chemist and His ScalesJacques-Louis David, 1788 · Public domain · Wikimedia Commons
• Chemistry of Everyday LifeThe Rubber on the StoveSouthworth & Hawes, c. 1850s · Public domain · Wikimedia Commons
• MaterialsFire on the BeachThe Metropolitan Museum of Art, Roman, 2nd–3rd century · CC0 · Wikimedia Commons
• Organic ChemistryThe Football MoleculeJynto, 2009 · CC0 · Wikimedia Commons
• CellsTiny Creatures in His TeethJan Verkolje, 1686 · Public domain · Wikimedia Commons
• Genetics & DNAA Race Declared a DrawGenerated with AI for KnowSoda, 2026 · Own work
• EvolutionNearly Turned Down for His NoseGeorge Richmond, 1840 · Public domain · Wikimedia Commons
• AnimalsThe Animal That Looked FakeGenerated with AI for KnowSoda, 2026 · Own work
• PlantsThe Willow in the PotRobert Cooper (engraver), 19th century · Public domain · Wikimedia Commons
• EcosystemsTwenty-Four RabbitsIconographia Zoologica, University of Amsterdam, 1700–1880 · Public domain · Wikimedia Commons
• The Human BodyThe Doctor Who Tested HimselfHenry Vandyke Carter (Gray’s Anatomy), 1918 · Public domain · Wikimedia Commons
• NutritionNo Germ at AllUnknown photographer, c. 1910s · Public domain · Wikimedia Commons
• SleepA Month in the DarkGenerated with AI for KnowSoda, 2026 · Own work
• Immunity & DiseaseA Lesson from ConstantinopleCharles Jervas, after 1716 · Public domain · Wikimedia Commons
• Mental HealthThe Teacher Who Visited JailsSamuel Bell Waugh, 1868 · Public domain · Wikimedia Commons
• History of MedicineSold for a DollarTibor Pólya, 1925 · Public domain · Wikimedia Commons
• Solar SystemThe Planet Found with a PenNASA, 1989 · Public domain · Wikimedia Commons
• Stars & GalaxiesThe Pigeons in the AntennaNASA, c. 1962 · Public domain · Wikimedia Commons
• Planet EarthThe Man Who Moved ContinentsGenerated with AI for KnowSoda, 2026 · Own work
• Weather & ClimateThe Captain Who Invented ForecastsUnidentified painter, 19th century · Public domain · Wikimedia Commons
• OceansDown to the Bottom of the WorldUS Navy, c. 1959 · Public domain · Wikimedia Commons
• Cognitive BiasesI Knew It All AlongByron Schumaker, White House, 1972 · Public domain · Wikimedia Commons
• How Memory WorksThe Poet Who Remembered the SeatsGenerated with AI for KnowSoda, 2026 · Own work
• EmotionsThe Doctor Who Wired Up FacesGuillaume Duchenne de Boulogne, 1854–56 · CC0 · Wikimedia Commons
• Habits & MotivationThe Drooling ProblemGenerated with AI for KnowSoda, 2026 · Own work
• Social PsychologyThe Smoke-Filled RoomGenerated with AI for KnowSoda, 2026 · Own work
• PersonalityThe Jim TwinsGenerated with AI for KnowSoda, 2026 · Own work
• How Computers WorkThe Christmas SwitchJack St., AT&T, 1948 · Public domain · Wikimedia Commons
• Programming BasicsThe Key Nobody Would PressDraper Laboratory, restored by Adam Cuerden, 1969 · Public domain · Wikimedia Commons
• AlgorithmsThe Man Who Became a WordUSSR postage stamp, 1983 · Public domain · Wikimedia Commons
• Operating SystemsJust a HobbyGenerated with AI for KnowSoda, 2026 · Own work
• History of ComputingThe Women Nobody IntroducedUS Army, c. 1946 · Public domain · Wikimedia Commons
• How the Internet WorksLo and BeholdBBN, 1969 · Public domain · Wikimedia Commons
• CybersecurityThe Worm That Broke the InternetGenerated with AI for KnowSoda, 2026 · Own work
• PrivacyThe Photo That Gave Him AwayGenerated with AI for KnowSoda, 2026 · Own work
• Social MediaThe Panic That Wasn’tAcme News Photos, 1938 · Public domain · Wikimedia Commons
• The Web & the CloudVague but ExcitingGenerated with AI for KnowSoda, 2026 · Own work
• What AI IsThe Move That Rattled a ChampionGenerated with AI for KnowSoda, 2026 · Own work
• Machine LearningThe Horse Who Could CountKarl Krall, 1904 · Public domain · Wikimedia Commons
• Generative AIThe Next-Word GameGenerated with AI for KnowSoda, 2026 · Own work
• Data & Big DataThe Flu Tracker That FailedCynthia Goldsmith, CDC, 2009 · Public domain · Wikimedia Commons
• AI EthicsThe Chatbot That Learned Too WellGenerated with AI for KnowSoda, 2026 · Own work
• CarsThe Day Sweden Switched SidesSwedish road authority (unknown photographer), 1967 · Public domain · Wikimedia Commons
• AviationHeads for WilburJohn T. Daniels, 1903 · Public domain · Wikimedia Commons
• ShipsEureka!Unknown artist, 16th century · Public domain · Wikimedia Commons
• TrainsThe Race at RainhillMechanics' Magazine, 1829 · Public domain · Wikimedia Commons
• Rockets & SpaceflightThe Lifeboat Near the MoonGenerated with AI for KnowSoda, 2026 · Own work
• Iconic BuildingsThe Only Place in ParisCarl Larsson, 1888 · Public domain · Wikimedia Commons
• Bridges & TunnelsThe Woman Who Finished the BridgeCurrier and Ives, 1883 · Public domain · Wikimedia Commons
• SkyscrapersThe Photographer in the SkyLewis Hine, 1930 · CC0 · Wikimedia Commons
• Materials & TechniquesThe Lily That Held a ChildWilliam Sharp, in John Fisk Allen’s Victoria Regia, 1854 · Public domain · Wikimedia Commons
• Cities & Urban PlanningThe Park ContestCurrier & Ives, after Charles Parsons, 1862 · CC0 · Wikimedia Commons
• How Electricity Reaches YouThe Night of 100,000 LampsCharles Graham, 1893 · Public domain · Wikimedia Commons
• Renewable EnergyThe Windmill in the GardenUnknown photographer, c. 1888 · Public domain · Wikimedia Commons
• Fossil FuelsDrake’s FollyUnknown photographer, 1866 · Public domain · Wikimedia Commons
• Nuclear PowerA Walk in the SnowSmithsonian Institution, 1946 · Public domain · Wikimedia Commons
• BatteriesThe Twitching FrogLuigi Galvani, 1791 · Public domain · Wikimedia Commons
• Inventions That Changed the WorldThe Mould That WaitedUnknown photographer, c. 1940s · Public domain · Wikimedia Commons
• SmartphonesThe First Mobile CallGenerated with AI for KnowSoda, 2026 · Own work
• RoboticsThe Chess Machine With a SecretJoseph Racknitz, after Kempelen, 1789 · Public domain · Wikimedia Commons
• Everyday TechListening to SputnikNASA, 1957 · Public domain · Wikimedia Commons
• Famous InventorsThe Little CuriesHenri Manuel, c. 1920 · Public domain · Wikimedia Commons
• Ancient WorldWonderful ThingsGenerated with AI for KnowSoda, 2026 · Own work
• Middle AgesWalls of ButterVictor Adolphe Malte-Brun, 1882 · Public domain · Wikimedia Commons
• Renaissance & ExplorationThe Missing DayAbraham Ortelius, 1589 · Public domain · Wikimedia Commons
• Age of RevolutionsLittle BoneyJames Gillray, 1805 · Public domain · Wikimedia Commons
• World WarsThe Wrong TurnWalter Tausch, 1914 · Public domain · Wikimedia Commons
• Modern WorldImmediately, Without DelayUS National Archives, 1961 · Public domain · Wikimedia Commons
• How Markets WorkThe Tulip That Cost a FortuneUnknown artist, 17th century · Public domain · Wikimedia Commons
• Money & InflationThe Money at the Bottom of the SeaUnknown photographer, 1932 · Public domain · Wikimedia Commons
• Trade & GlobalizationThe Truck Driver’s BoxGenerated with AI for KnowSoda, 2026 · Own work
• Behavioral EconomicsThe Offer Nobody WantedGenerated with AI for KnowSoda, 2026 · Own work
• Economic HistoryTwenty Miles BackDorothea Lange, 1936 · Public domain · Wikimedia Commons
• Budgeting & SavingFranklin’s 200-Year GiftJoseph-Siffred Duplessis, c. 1778 · CC0 · Wikimedia Commons
• Investing BasicsThe Janitor’s FortuneGenerated with AI for KnowSoda, 2026 · Own work
• Debt & CreditLincoln the Credit ReporterAttributed to Nicholas H. Shepherd, 1846 · Public domain · Wikimedia Commons
• TaxesThe Tax They Tried to BurnJohn Hoppner, c. 1805 · Public domain · Wikimedia Commons
• RetirementThe Last Civil War PensionInternational News Service, 1913 · Public domain · Wikimedia Commons
• Crypto ExplainedThe 10,000-Bitcoin PizzasNeo139, 2019 · CC0 · Wikimedia Commons
• Political SystemsWrite AristidesUnknown photographer, 5th century BCE object · Public domain · Wikimedia Commons
• Democracy & ElectionsThe 270-Metre PetitionUnidentified photographer, c. 1914 · Public domain · Wikimedia Commons
• Law & JusticeThe Jury That Wouldn’t BudgeUnknown engraver, 19th century · Public domain · Wikimedia Commons
• International RelationsThe Oldest Peace TreatyGenerated with AI for KnowSoda, 2026 · Own work
• Human RightsNobody Voted AgainstUnited Nations, 1949 · Public domain · Wikimedia Commons
• Big QuestionsNobody Is WiserJacques-Louis David, 1787 · Public domain · Wikimedia Commons
• Ancient PhilosophyThe Sage at the GateGenerated with AI for KnowSoda, 2026 · Own work
• EthicsThe Clockwork PhilosopherJohann Gottlieb Becker, 1768 · Public domain · Wikimedia Commons
• Logic & ArgumentsThe Black SwanJohn Gerrard Keulemans, 1869 · Public domain · Wikimedia Commons
• Modern PhilosophyGreek at ThreeLondon Stereoscopic Company, c. 1870 · Public domain · Wikimedia Commons
• Religions of the WorldThe Emperor on the FloorUnknown artist, 19th century · Public domain · Wikimedia Commons
• Abrahamic FaithsThe Immovable LadderDetroit Publishing Co. (photochrom), c. 1890–1900 · Public domain · Wikimedia Commons
• HinduismThe Broken TuskUnknown Kalighat painter, 19th century · CC0 · Wikimedia Commons
• BuddhismThe Four SightsUnknown temple painter, 20th century · Public domain · Wikimedia Commons
• East Asian TraditionsScaring Away the NianUnknown artist, c. 1900 · Public domain · Wikimedia Commons
• Countries & CapitalsA Capital From ScratchGenerated with AI for KnowSoda, 2026 · Own work
• FlagsThe Flag From the SkyChristian August Lorentzen, 1809 · CC0 · Wikimedia Commons
• Maps & NavigationThe Clock That Found the SeaThomas King, 1767 · Public domain · Wikimedia Commons
• Borders & TerritoriesThe Pig WarUnknown photographer, 1872 · Public domain · Wikimedia Commons
• Population & CitiesFirst in LineUnknown photographer, 1902 · Public domain · Wikimedia Commons
• World Records of GeographyPeak XVWikimedia Commons user Mex, 2000s · Public domain · Wikimedia Commons
• Famous PaintingsTwo Guilders for a VermeerJohannes Vermeer, c. 1665 · Public domain · Wikimedia Commons
• Art MovementsThe Painter They ForgotArtemisia Gentileschi, c. 1638 · Public domain · Wikimedia Commons
• Techniques & ColorMummy BrownUnknown painter, Roman Egypt, c. 200 CE · Public domain · Wikimedia Commons
• SculptureThe Poet Who Became the ThinkerAndrewHorne, 2010s · Public domain · Wikimedia Commons
• PhotographyThe Man Having His Boots ShinedLouis Daguerre, 1838 · Public domain · Wikimedia Commons
• Architecture StylesToo Tall to StandSamuel Prout, 19th century · CC0 · Wikimedia Commons
• Music GenresThe Weirdest MusicWide World Photos, 1949 · Public domain · Wikimedia Commons
• InstrumentsThe Violinist in the SubwayGenerated with AI for KnowSoda, 2026 · Own work
• Music TheoryThe Pitch-ForkK. Venkataramana, 2010s · CC0 · Wikimedia Commons
• Music HistoryThe Silent ApplauseJoseph Karl Stieler, 1820 · Public domain · Wikimedia Commons
• Iconic ArtistsGuitar Groups Are on the Way OutUnited Press International, 1964 · Public domain · Wikimedia Commons
• Classic NovelsThe Fake SequelGustave Doré, 1863 · Public domain · Wikimedia Commons
• PoetryThe Narrow RoadKatsushika Hokusai, c. 1817 · Public domain · Wikimedia Commons
• Literary DevicesThe Storyteller Who Made Animals TalkMilo Winter, 1919 · Public domain · Wikimedia Commons
• Famous AuthorsIs Little Nell Dead?Robert Hannah, 1860s · Public domain · Wikimedia Commons
• Words & EtymologyHow OK Got Its StartGeorge Peter Alexander Healy, 1858 · Public domain · Wikimedia Commons
• Languages of the WorldThe Talking LeavesHenry Inman, after Charles Bird King, c. 1830 · Public domain · Wikimedia Commons
• Film HistoryThe Train That Scared ParisLouis Lumière, 1896 · Public domain · Wikimedia Commons
• How Movies Are MadeThe Inventor Who VanishedLouis Le Prince, 1888 · Public domain · Wikimedia Commons
• GenresThe Magician Who Went to the MoonGeorges Méliès, 1902 · Public domain · Wikimedia Commons
• AnimationA Mouse on the TrainWalt Disney and Ub Iwerks, 1928 · Public domain · Wikimedia Commons
• Iconic Films & SeriesAn Ending Nobody KnewWarner Bros. trailer, 1942 · Public domain · Wikimedia Commons
• Video Game HistoryThe Game Too Full of CoinsGenerated with AI for KnowSoda, 2026 · Own work
• GenresMario the LandlordGenerated with AI for KnowSoda, 2026 · Own work
• How Games Are MadeThe First Easter EggGenerated with AI for KnowSoda, 2026 · Own work
• Iconic FranchisesThe Cave in the HillsGenerated with AI for KnowSoda, 2026 · Own work
• EsportsA Prize Worth One MagazineGenerated with AI for KnowSoda, 2026 · Own work
• FootballThe Long Voyage to 1930Unknown photographer, 1930 · Public domain · Wikimedia Commons
• Olympic GamesThe Water Carrier’s MarathonUnknown photographer, 1896 · Public domain · Wikimedia Commons
• BasketballTwo Weeks to Invent a GameUnknown photographer, c. 1890s · Public domain · Wikimedia Commons
• TennisThe Broken Pony RollerUnknown photographer, c. 1877 · Public domain · Wikimedia Commons
• MotorsportThe Mirror That ShookUnknown photographer, 1911 · Public domain · Wikimedia Commons
• Sports ScienceBarefoot in RomeMondadori Portfolio / Sergio del Grande, 1960 · Public domain · Wikimedia Commons
• World CuisinesA Pizza for the QueenUnknown photographer, c. 1880s · Public domain · Wikimedia Commons
• Food ScienceMeasuring the BurnFranz Eugen Köhler, 1887 · Public domain · Wikimedia Commons
• Spices & IngredientsA Ransom in PepperFranz Eugen Köhler, 1887 · Public domain · Wikimedia Commons
• Food HistoryThe Prize for Keeping FoodÉdouard Foucaud, 19th century · Public domain · Wikimedia Commons
• Coffee, Tea & DrinksThe Poet’s Coffee BeansUnknown artist, c. 1860 · Public domain · Wikimedia Commons
• Fashion HistoryTrousers That Wouldn’t RipGenerated with AI for KnowSoda, 2026 · Own work
• Iconic DesignersFrom Orphanage to FashionMarius Borgeaud, c. 1920 · Public domain · Wikimedia Commons
• Graphic DesignThe Poster Nobody SawUK Government (Ministry of Information), 1939 · Public domain · Wikimedia Commons
• Product DesignPlay WellGodtfred Kirk Christiansen (US patent drawing), 1958 · Public domain · Wikimedia Commons
• TextilesThe Cocoon in the TeacupEmperor Huizong, after Zhang Xuan, 12th century · Public domain · Wikimedia Commons
• Myths & LegendsThe Flood on the TabletUnknown photographer, 1870s · Public domain · Wikimedia Commons
• Festivals & CelebrationsThe Lady SkeletonJosé Guadalupe Posada, c. 1910 · Public domain · Wikimedia Commons
• Customs & EtiquetteV for VictoryWar Office official photographer, 1943 · Public domain · Wikimedia Commons
• Folklore & SuperstitionsSofter, but Also BloodierElisabeth Jerichau-Baumann, 1855 · Public domain · Wikimedia Commons
• Traditional CraftsMended With GoldGenerated with AI for KnowSoda, 2026 · Own work