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Tech Trivia

Trivia about technology, gadgets, science and the internet. Play today's free trivia →

  1. Which video game franchise introduced players to a post-apocalyptic open world where factions like the Brotherhood of Steel battle over nuclear-age technology — setting so many games in this universe that it became one of gaming's biggest RPG brands?

    Fallout

    Did you know?

    The Fallout series, launched in 1997, is set in an alternate retro-futuristic America devastated by nuclear war. Its mix of dark humor, choice-driven storytelling, and 1950s Americana aesthetic made it a landmark franchise, culminating in a hit Amazon TV adaptation in 2024.

    From July 14, 2026
  2. Which early aviation pioneer made the first powered, controlled airplane flight before the Wright Brothers — only to be largely erased from history partly because his flight wasn't independently witnessed?

    Gustave Whitehead

    Did you know?

    Gustave Whitehead, a German-American inventor, reportedly flew a powered aircraft in Connecticut in 1901 — two years before Kitty Hawk. The state of Connecticut officially recognized his claim in 2013, though aviation historians remain divided on the evidence.

    From July 12, 2026
  3. A common belief is that the original Pac-Man game character was designed as a pizza with a slice missing. What actually inspired creator Toru Iwatani's design?

    A pizza with one slice removed — the story is actually true

    Did you know?

    In this case the popular story is true — Toru Iwatani has confirmed that he was eating pizza and the shape of the pie with a slice missing sparked the design. He also noted that the Japanese word 'paku-paku,' meaning the sound of a mouth opening and closing, inspired the name Pac-Man.

    From July 9, 2026
  4. The 'black box' flight recorder on an airplane is almost never actually black. What color is it required to be — and why?

    Bright orange, so it's easier to spot at a crash site

    Did you know?

    Flight recorders must be bright orange so they're easier to locate among wreckage and debris after a crash. The nickname 'black box' is thought to come from early electronics slang for any self-contained mystery device — and the name stuck despite the color.

    From July 6, 2026
  5. Which law of robotics, famously proposed by Isaac Asimov in 1942, states that a robot must obey human orders UNLESS those orders conflict with a higher-ranked law?

    The Second Law

    Did you know?

    Asimov's Second Law requires robots to obey all human orders except where doing so would harm a human (First Law). His framework was so influential that roboticists and AI ethicists still cite it when designing machine decision hierarchies, despite Asimov himself spending his career exploring why the laws would inevitably break down.

    From July 1, 2026
  6. In the International System of Units, which base unit is defined using the Planck constant rather than a physical artifact — a change made in 2019 that retired the last physical object used to define a unit?

    The kilogram

    Did you know?

    Until 2019, the kilogram was officially defined by a platinum-iridium cylinder kept in a vault outside Paris called the International Prototype of the Kilogram. Scientists redefined it using the fixed numerical value of the Planck constant, making it the last SI unit to abandon a physical reference object.

    From June 29, 2026
  7. Which printing innovation, developed in 15th-century Germany, used individual movable metal type pieces that could be rearranged and reused — replacing laborious hand-copying and transforming how information spread?

    The Gutenberg press

    Did you know?

    Johannes Gutenberg's movable-type printing press, developed around 1440 in Mainz, Germany, is often cited as one of the most transformative inventions in human history. Within 50 years of its introduction, an estimated 20 million books had been printed in Europe — more than all European scribes had produced in the previous thousand years.

    From June 28, 2026
  8. What was the original purpose of the raised dot used in Braille — before Louis Braille adapted it as a reading system for the blind?

    Night-reading messages for Napoleon's soldiers

    Did you know?

    Charles Barbier published his tactile writing system in 1815 as a literacy tool, which was later nicknamed 'night writing.' The original code relied on a complex 12-dot cell—but Louis Braille, who was blinded at age 3, radically streamlined it down to a 6-dot alphabetical cell, transforming it into a global literacy tool.

    From June 28, 2026
  9. The 'Antikythera Mechanism,' recovered from a Greek shipwreck in 1901, is believed to be the world's oldest known analog computer. What was its primary function?

    Predicting astronomical events including eclipses and planetary positions

    Did you know?

    Dating to around 100 BC, the Antikythera Mechanism used a system of over 30 bronze gears to predict solar and lunar eclipses, track the Metonic cycle, and display planetary positions — a level of mechanical sophistication not seen again for over 1,000 years.

    From June 27, 2026
  10. Which 1884 industrial printing invention, composed of over 36,000 moving parts, was famously dubbed the 'Eighth Wonder of the World' by Thomas Edison because it completely mechanized newspaper composition?

    The Linotype machine

    Did you know?

    Ottmar Mergenthaler's Linotype machine revolutionized printing by casting entire lines of text in molten lead. While the Linotype dominated newspapers, author Mark Twain notoriously bankrupted himself investing in its rival, the Paige Compositor, which he blindly called 'the most extraordinary invention of the age.

    From June 26, 2026
  11. Which video game franchise introduced the 'bullet time' slow-motion mechanic to mainstream gaming in 2001, borrowing the visual concept directly from the 1999 film The Matrix?

    Max Payne

    Did you know?

    Max Payne, released in 2001 by Remedy Entertainment, popularized slow-motion 'bullet time' in video games, explicitly referencing The Matrix as an influence. The mechanic let players dramatically dodge bullets while firing in slow motion.

    From June 26, 2026
  12. Which tech concept, introduced in a 2008 white paper by a pseudonymous author named Satoshi Nakamoto, proposed a peer-to-peer electronic cash system that would eliminate the need for trusted financial intermediaries like banks?

    Bitcoin

    Did you know?

    Satoshi Nakamoto's 2008 white paper 'Bitcoin: A Peer-to-Peer Electronic Cash System' launched the cryptocurrency era. The true identity of Nakamoto — whether one person or a group — remains one of the great unsolved mysteries of the tech world.

    From June 26, 2026
  13. Which 17th-century company was the first to issue publicly tradeable shares to outside investors — effectively inventing the modern stock exchange?

    The Dutch East India Company

    Did you know?

    The Dutch East India Company (Vereenigde Oost-Indische Compagnie), founded in 1602, issued shares that could be freely bought and sold on the Amsterdam Stock Exchange — the world's first. At its peak the VOC was worth more than Apple, Google, and Amazon combined in today's equivalent value.

    From June 25, 2026
  14. Which space mission, launched in 1989, was the first to map the entire surface of Venus using radar — revealing a young, volcanically active world resurfaced within the last 300–600 million years?

    Magellan

    Did you know?

    NASA's Magellan spacecraft mapped 98% of Venus's surface with synthetic aperture radar before being deliberately plunged into the atmosphere in 1994. Its data revealed thousands of volcanoes alongside a sparse, pristine population of just over 900 impact craters, proving Venus was geologically resurfaced all at once in its recent past.

    From June 22, 2026
  15. Which 2007 video game, set during a 1960s underwater dystopia, featured one of the most celebrated plot twists in gaming history involving the phrase 'Would you kindly?'

    Bioshock

    Did you know?

    BioShock's 'Would you kindly?' twist revealed that the player character had been conditioned to obey any command preceded by that phrase, making the entire first half of the game a meta-commentary on player agency and free will. Game designers still study it as one of the most elegant uses of the medium's unique storytelling potential.

    From June 21, 2026
  16. Which famous inventor originally coined the unit 'horsepower' as a marketing gimmick to demonstrate that his mechanical machinery could outperform livestock?

    James Watt

    Did you know?

    James Watt coined 'horsepower' in the 1780s to help mine owners understand how many horses a steam engine could replace. He also gave his name to the 'watt,' the SI unit of power, making him one of the few people to have two major units named after him.

    From June 19, 2026
  17. Which unit of audio intensity is named after a 19th-century inventor who originally developed his acoustic theories while working as a teacher for the deaf?

    Decibel

    Did you know?

    he decibel is named after Alexander Graham Bell, who invented the telephone. The 'bel' (and its more practical fraction, the decibel) was coined by engineers at Bell Telephone Laboratories to quantify signal loss in telephone lines, replacing the older 'mile of standard cable' metric.

    From June 19, 2026
  18. Which mathematical concept, introduced in the 1960s by Edward Lorenz while modeling weather systems, showed that tiny differences in initial conditions can lead to wildly different outcomes — popularly illustrated by the idea of a butterfly causing a hurricane?

    Chaos Theory

    Did you know?

    Edward Lorenz discovered chaos theory accidentally when he re-entered a weather simulation using a rounded number instead of the full decimal, producing a completely different forecast. The 'butterfly effect' became its defining metaphor, formalized in his 1972 paper titled 'Does the Flap of a Butterfly's Wings in Brazil Set Off a Tornado in Texas?'

    From June 14, 2026
  19. In aviation, what is the name of the invisible atmospheric phenomenon where aircraft suddenly lose altitude without warning due to a column of descending cold air — responsible for several fatal crashes and the reason pilots avoid certain cloud formations?

    Microburst

    Did you know?

    A microburst is a concentrated downdraft of air that can slam into the ground and spread outward, causing catastrophic wind shear during takeoff or landing. The 1985 Delta Air Lines Flight 191 crash near Dallas-Fort Worth brought microbursts into public awareness and led to widespread installation of Doppler weather radar at airports.

    From June 8, 2026
  20. Which tech company owned the search engine AltaVista, one of the most popular search tools of the late 1990s before Google dominated the market?

    Digital Equipment Corporation

    Did you know?

    AltaVista was created by Digital Equipment Corporation (DEC) in 1995 and was briefly the fastest and most comprehensive search engine available. It was later acquired by Compaq, then Yahoo, before being shut down in 2013.

    From June 6, 2026
  21. Which tech company's autocomplete algorithm became so notorious for completing the phrase 'women should' with harmful suggestions that it sparked a major academic study on algorithmic bias in 2017?

    Google

    Did you know?

    Researchers at the University of Washington documented how Google's autocomplete mirrored and amplified existing societal biases, helping launch the field of algorithmic accountability as a serious area of study.

    From June 4, 2026
  22. Which classic video game console was bundled with a light gun peripheral called the 'Zapper' that only functioned correctly on CRT televisions — making it completely non-functional on modern flat screens?

    Nintendo Entertainment System

    Did you know?

    The NES Zapper worked by detecting rapid black-and-white light flashes drawn on the screen by the console's software when the trigger was pulled. This precise timing trick doesn't work on modern LED or LCD displays because their digital processing lag throws off the console's time-critical window.

    From May 31, 2026
  23. Which famous tech company was originally called 'Cadabra' before its founder changed the name after a lawyer misheard it as 'cadaver'?

    Amazon

    Did you know?

    Jeff Bezos originally named his company Cadabra in 1994, but changed it to Amazon after an attorney misheard it as 'cadaver' — a terrible association for a new business.

    From May 29, 2026
  24. Which sci-fi author coined the term 'cyberspace' in a 1984 novel, describing a global network of computers as a consensual hallucination — decades before the modern internet existed?

    William Gibson

    Did you know?

    William Gibson coined 'cyberspace' in his debut novel 'Neuromancer' in 1984, describing it as a 'consensual hallucination experienced daily by billions.' The concept predicted much of modern internet culture and virtual reality thinking.

    From May 26, 2026
  25. Which Nobel Prize was awarded to the discoverers of CRISPR-Cas9 gene editing in 2020 — and was notable because it was awarded exclusively to women for the first time in that prize's history?

    Nobel Prize in Chemistry

    Did you know?

    Jennifer Doudna and Emmanuelle Charpentier won the 2020 Nobel Prize in Chemistry for developing CRISPR-Cas9, marking the first time the Chemistry prize was awarded to an all-female team of researchers.

    From May 26, 2026
  26. Which tech entrepreneur sent a Tesla Roadster into space aboard the inaugural Falcon Heavy rocket launch in 2018?

    Elon Musk

    Did you know?

    Elon Musk used his own cherry-red Tesla Roadster as a test payload for SpaceX's Falcon Heavy debut in February 2018, with a mannequin dubbed 'Starman' in the driver's seat.

    From May 24, 2026
  27. What is the name of the paradox where adding a new road to a traffic network can actually make average travel times worse for everyone, seemingly contradicting common sense?

    Braess's Paradox

    Did you know?

    Braess's Paradox, described by mathematician Dietrich Braess in 1968, shows that when everyone selfishly chooses their optimal route, adding road capacity can counterintuitively increase overall congestion — a phenomenon that has been observed in real cities including Seoul and Stuttgart.

    From May 22, 2026
  28. In computing, what term describes the deliberate slowing down of older devices through software updates — a practice Apple was fined over $100 million for after secretly doing it to older iPhones?

    Planned obsolescence

    Did you know?

    Planned obsolescence refers to designing products to become outdated or perform worse over time; Apple faced legal action in multiple countries after admitting it slowed older iPhones without clearly disclosing this to users.

    From May 21, 2026
  29. Which social media platform was originally launched as a photo-sharing app exclusively for iPhone users in October 2010?

    Instagram

    Did you know?

    Instagram launched on October 6, 2010, exclusively on iOS, gaining one million users in just two months before eventually releasing an Android version in 2012.

    From May 19, 2026
  30. Which streaming platform introduced the 'autoplay next episode' feature in 2012, a design decision that researchers later linked to binge-watching behavior and disrupted sleep patterns worldwide?

    Netflix

    Did you know?

    Netflix introduced continuous autoplay as a default setting in 2012, later admitting it fueled excessive viewing—famously stating their biggest competitor was "sleep". While the company did not turn the feature off by default in 2020, it did finally respond to years of pressure by allowing users to manually disable autoplay for both next episodes and homepage previews for the first time.

    From May 18, 2026
  31. Which tech company's headquarters features a 175-acre campus called 'the Spaceship' — a circular glass building with no external doors on the outside ring — designed by Sir Norman Foster and completed in 2017?

    Apple

    Did you know?

    Apple Park in Cupertino, California, officially opened in 2017. The main building, Apple Park Visitor Center aside, is a massive ring with over 12,000 employees and no external ground-floor doors to the outside world.

    From May 17, 2026
  32. In computing, what is the name of the principle stating that the number of transistors on a microchip doubles approximately every two years, a prediction that guided the semiconductor industry for over five decades?

    Moore's Law

    Did you know?

    Gordon Moore, co-founder of Intel, made this observation in 1965. It became a self-fulfilling prophecy as chipmakers used it as a target, though the pace has slowed considerably since the 2010s.

    From May 17, 2026
  33. In competitive gaming, which annual tournament for the strategy game Dota 2 regularly offers prize pools exceeding $40 million — making it the highest prize pool for a single esports event in history?

    The International

    Did you know?

    The International, Dota 2's annual world championship organized by Valve, crowdfunds its prize pool through in-game cosmetic purchases.

    From May 16, 2026
  34. What is the name of the effect where spinning a hard-boiled egg causes it to stand upright on its own, a phenomenon that stumped physicists for decades?

    Jallett's Effect

    Did you know?

    When a hard-boiled egg is spun rapidly on a flat surface, friction and gyroscopic forces cause it to rise and balance on its tip — a behavior that wasn't mathematically explained until 2002.

    From May 10, 2026
  35. Which mathematical concept, introduced by John Horton Conway in 1970, involves a grid of cells that 'live' or 'die' based on simple neighbor rules — yet produces astonishingly complex emergent behaviors with no player input?

    Game of Life

    Did you know?

    Conway's Game of Life is a zero-player cellular automaton where cells on a grid live, die, or reproduce based on four simple rules, yet can produce self-replicating structures, gliders, and patterns of extraordinary complexity.

    From May 7, 2026
  36. Which country sent a mission called 'Hope' to Mars in 2021, becoming the first Arab nation and only the fifth entity in history to successfully reach the Red Planet?

    United Arab Emirates

    Did you know?

    The UAE's 'Hope' probe entered Mars orbit in February 2021 on the country's 50th anniversary year. Built in collaboration with U.S. universities, it studies the Martian atmosphere and weather patterns.

    From May 7, 2026
  37. Which early internet browser, released in 1994, dominated the web with over 80% market share before being crushed by Internet Explorer?

    Netscape Navigator

    Did you know?

    Netscape Navigator was the dominant browser of the mid-1990s until Microsoft bundled Internet Explorer with Windows, triggering the infamous 'Browser Wars' that led to Netscape's decline.

    From May 7, 2026
  38. What is the name of the statistical paradox where a trend appears in several groups of data but reverses or disappears when those groups are combined?

    Simpson's Paradox

    Did you know?

    Simpson's Paradox famously showed up in UC Berkeley's admissions data in 1973, where overall data appeared to show gender bias but the opposite was true when broken down by department.

    From May 6, 2026
  39. Which theoretical computer science concept, proposed in 1936, described a hypothetical machine capable of computing any algorithm — laying the foundation for every modern computer ever built?

    Turing Machine

    Did you know?

    Alan Turing's 1936 paper describing the Turing Machine established the theoretical basis for all modern computing, defining what it means for a problem to be 'computable' before physical computers existed.

    From May 4, 2026
  40. Which video game console, released in 1995, was so badly damaged by a single poorly worded review from a major gaming magazine that sales never recovered and it was discontinued within two years?

    Virtual Boy

    Did you know?

    Nintendo's Virtual Boy was discontinued in 1995-96 after catastrophic sales partly fueled by damaging press coverage warning of headaches and eye strain. It sold fewer than 800,000 units worldwide, making it one of Nintendo's biggest commercial failures.

    From May 3, 2026
  41. What is the term for the eerie blue glow produced when highly energetic particles travel through water faster than light can travel through that medium?

    Cherenkov radiation

    Did you know?

    Cherenkov radiation is the electromagnetic equivalent of a sonic boom — when charged particles exceed the local speed of light in a medium like water, they emit this characteristic blue glow visible in nuclear reactor pools.

    From May 2, 2026
  42. Which tech company's internal project, codenamed 'Project Loon,' involved sending internet-beaming balloons into the stratosphere to deliver connectivity to remote regions — before being shut down in 2021?

    Google (Alphabet)

    Did you know?

    Project Loon was an Alphabet (Google's parent company) initiative launched in 2013 that used high-altitude balloons to provide internet access in remote areas, but was discontinued in January 2021 citing financial unsustainability.

    From April 30, 2026
  43. Which early internet protocol, still technically in use today, allowed users to log into remote computers over a network but sent all data — including passwords — entirely unencrypted?

    Telnet

    Did you know?

    Telnet, developed in 1969, was one of the first internet protocols and transmitted all data in plain text with no encryption, making it fundamentally insecure and largely replaced by SSH in the 1990s.

    From April 29, 2026
  44. Which spacecraft was the first to leave our solar system entirely, officially crossing into interstellar space in 2012 after a 35-year journey?

    Voyager 1

    Did you know?

    Voyager 1, launched in 1977, crossed the heliopause — the boundary of the sun's influence — in 2012, becoming the first human-made object to enter interstellar space.

    From April 28, 2026
  45. Which tech company's AI assistant was the first voice-activated AI to be built into a smartphone, launching in October 2011 and setting the template for all future AI assistants?

    Apple

    Did you know?

    Apple's Siri debuted with the iPhone 4S on October 4, 2011 — the day before Steve Jobs died. It pioneered mass-market conversational AI and triggered a race among all major tech companies to build their own voice assistants.

    From April 25, 2026
  46. Which philosopher famously argued that we could be living in a simulation, publishing his 'Simulation Argument' in 2003?

    Nick Bostrom

    Did you know?

    Swedish philosopher Nick Bostrom published the Simulation Argument in 2003, proposing a trilemma: either civilizations go extinct before reaching computing maturity, they lose interest in running simulations, or we are almost certainly living in one.

    From April 24, 2026
  47. What is the name of the Soviet spacecraft that became the first human-made object to land on another planet, touching down on Venus in 1970 and surviving the crushing atmosphere for 23 minutes before being destroyed?

    Venera 7

    Did you know?

    Venera 7 landed on Venus on December 15, 1970, becoming the first spacecraft to successfully land on another planet and transmit data from its surface. It recorded temperatures of around 475°C and pressures 90 times that of Earth's atmosphere.

    From April 24, 2026
  48. Which early computing pioneer proposed the famous test for machine intelligence in 1950, suggesting that a machine could be considered intelligent if it could fool a human into thinking they were talking to another person?

    Alan Turing

    Did you know?

    Alan Turing proposed what he called the 'Imitation Game' in his 1950 paper 'Computing Machinery and Intelligence,' now universally known as the Turing Test. It remains a foundational benchmark in artificial intelligence philosophy.

    From April 20, 2026
  49. What was the name of the ill-fated social network launched by Google in 2011 that tried to compete with Facebook, featured 'Circles' for organizing contacts, and was shut down in 2018 after a data breach?

    Google Plus

    Did you know?

    Google+ launched in June 2011 and gained 10 million users in its first two weeks, but never displaced Facebook. It was shut down in April 2019 after a security bug exposed the private data of up to 500,000 users.

    From April 19, 2026
  50. Which country launched the world's first nationwide 5G network, activating the service commercially in April 2019 and beating competitors by days?

    South Korea

    Did you know?

    South Korea launched nationwide 5G service on April 3, 2019, with the three major carriers simultaneously activating the network — beating the U.S. and other competitors to the milestone.

    From April 17, 2026
  51. What is the name of the algorithm that Google's founders originally developed at Stanford, which ranks web pages based on how many other pages link to them?

    PageRank

    Did you know?

    PageRank, named partly after co-founder Larry Page, treated links between websites like academic citations — a page linked to by many authoritative pages was assumed to be more credible.

    From April 16, 2026
  52. In which year did the first iPhone go on sale, fundamentally changing the mobile phone industry?

    2007

    Did you know?

    Apple released the original iPhone on June 29, 2007, following Steve Jobs's famous January 2007 announcement where he called it 'an iPod, a phone, and an internet communicator.'

    From April 16, 2026
  53. In computing, which company developed the first hard disk drive in 1956, a unit that weighed over a ton and stored just 5 megabytes of data?

    IBM

    Did you know?

    IBM's RAMAC 305 was the world's first commercial hard disk drive, shipping in 1956. It consisted of 50 spinning disks and could store 5 MB — roughly one high-resolution photo by today's standards.

    From April 13, 2026
  54. Which video game, originally developed as a tech demo for a graphics engine, accidentally became one of the most influential first-person shooters in history when released in 1993?

    Doom

    Did you know?

    Doom was created by id Software primarily to show off their new game engine's capabilities, but it sold over one million copies, pioneered multiplayer deathmatches, and defined the FPS genre.

    From April 12, 2026
  55. What is the name of the strange quantum physics phenomenon where particles become linked so that measuring one instantly affects the other, no matter how far apart they are?

    Quantum entanglement

    Did you know?

    Quantum entanglement describes a situation where two particles share a quantum state, so measuring one instantly determines properties of the other regardless of distance. Einstein famously called it 'spooky action at a distance' because it seemed to violate relativity.

    From April 11, 2026
  56. Which tech company's internal memo, leaked in 2023, warned that they had 'no moat' and that open-source competitors would outpace them on AI development?

    Google

    Did you know?

    A leaked 2023 Google internal document titled 'We Have No Moat' argued that neither Google nor OpenAI could maintain a competitive lead over rapidly advancing open-source AI models.

    From April 10, 2026
  57. Which early social media platform, launched in 2003, was briefly the most visited website in the world and is now owned by Viant Technology (formerly Time Inc.)?

    MySpace

    Did you know?

    MySpace was the undisputed king of music discovery because it was the first platform to give artists a dedicated "Music Profile" with a built-in audio player. Famous artists like Arctic Monkeys or Calvin Harris got their big break specifically through MySpace

    From April 9, 2026
  58. What is the name of the programming paradigm where code is organized around 'objects' that combine data and behavior?

    Object-oriented programming

    Did you know?

    Object-oriented programming (OOP) organizes software design around objects — bundling data (attributes) and functions (methods) together. Languages like Java, Python, and C# are heavily built on OOP principles.

    From April 9, 2026
  59. What is the name of the AI technique where a model is trained by playing against itself repeatedly to improve, famously used to master the game of Go?

    Reinforcement learning via self-play

    Did you know?

    AlphaGo Zero used reinforcement learning through self-play — starting with no human data and training purely by playing millions of games against itself — to become the strongest Go player in history within 40 days.

    From April 7, 2026
  60. Which video game, released in 1984 by a Soviet programmer, was so addictive that the U.S. military studied it to understand how to keep soldiers mentally sharp during downtime?

    Tetris

    Did you know?

    Tetris, created by Alexey Pajitnov, was studied extensively by the military and psychologists because it induced a state of deep focus now associated with 'flow' states.

    From April 6, 2026
  61. Which company developed the first commercially successful graphical user interface operating system for personal computers, released in 1985?

    Microsoft

    Did you know?

    Microsoft Windows 1.0 launched in November 1985 as the first commercially successful GUI OS for IBM-compatible PCs. Though Apple's Lisa and Mac had GUI systems earlier, Windows achieved mass commercial adoption.

    From April 5, 2026
  62. Which country was the first to make Bitcoin legal tender alongside its national currency, doing so in September 2021?

    El Salvador

    Did you know?

    El Salvador became the first country in the world to adopt Bitcoin as legal tender in 2021, under President Nayib Bukele, despite concerns from the IMF.

    From April 4, 2026
  63. In computer science, what is the maximum number of colors needed to color any flat map so that no two adjacent regions share the same color, as proven in 1976?

    4

    Did you know?

    The Four Color Theorem states that only four colors are ever needed for any planar map. Its 1976 proof by Appel and Haken was controversial because it was partly verified by computer, the first major theorem proved this way.

    From April 3, 2026
  64. What is the term for the eerie psychological effect where a robot or CGI character that looks almost but not quite human causes feelings of discomfort or revulsion in viewers?

    Uncanny valley

    Did you know?

    The uncanny valley was first described by roboticist Masahiro Mori in 1970, and it explains why near-realistic androids and digital humans often feel deeply unsettling.

    From April 2, 2026
  65. What is the name of the scientific field that studies the possibility of life elsewhere in the universe, combining biology, chemistry, astronomy, and geology?

    Astrobiology

    Did you know?

    Astrobiology is the interdisciplinary study of the origin, evolution, and distribution of life in the universe. NASA's astrobiology program funds research ranging from extremophiles on Earth to the atmospheric composition of distant exoplanets.

    From April 1, 2026
  66. Which famous video game company was originally founded as a playing card manufacturer in 1889?

    Nintendo

    Did you know?

    Nintendo was founded in Kyoto, Japan in 1889 by Fusajiro Yamauchi to produce handcrafted hanafuda playing cards, pivoting to electronics and video games nearly a century later.

    From March 30, 2026
  67. Which Silicon Valley company famously started in a garage in Menlo Park, California, founded by two Stanford dropouts in 1998?

    Google

    Did you know?

    Larry Page and Sergey Brin founded Google in a rented garage in Menlo Park in 1998, having worked on the project while attending Stanford. The garage belonged to Susan Wojcicki, who later became CEO of YouTube.

    From March 30, 2026
  68. In graph theory and computer science, which algorithm finds the shortest path between nodes in a weighted graph, commonly used in GPS navigation systems?

    Dijkstra's algorithm

    Did you know?

    Dijkstra's algorithm, developed by Edsger W. Dijkstra in 1956, efficiently finds the shortest path from a starting node to all other nodes in a weighted graph with non-negative edge weights.

    From March 29, 2026
  69. In which decade was the first text message ever sent, and what did it say?

    1990s — 'Merry Christmas'

    Did you know?

    The first SMS was sent on December 3, 1992, by Neil Papworth to Vodafone executive Richard Jarvis, reading 'Merry Christmas.' Jarvis couldn't reply because phones couldn't send texts yet.

    From March 28, 2026
  70. Which tech company created the programming language Rust, which has been voted the 'most loved programming language' by developers for eight consecutive years?

    Mozilla

    Did you know?

    Rust was created by Mozilla Research and first released in 2010, designed to offer memory safety without a garbage collector. It has since been adopted by companies like Microsoft and Google for systems programming due to its security advantages.

    From March 26, 2026
  71. What is the name of the Twitter/X feature that allows users to correct misinformation on posts through community consensus, originally piloted under a different name?

    Community Notes

    Did you know?

    Community Notes, formerly called Birdwatch during its pilot phase, allows approved contributors to add context or corrections to misleading tweets.

    From March 25, 2026
  72. Which video game, released in December 1982, is believed to have caused a massive market crash that nearly destroyed the entire home console industry in North America?

    E.T. the Extra-Terrestrial

    Did you know?

    Often cited as the "worst video game ever made," its spectacular failure and the subsequent "Atari shock" nearly destroyed the North American home console industry.

    From March 23, 2026
  73. Which programming language was named after a 19th-century mathematician often considered the world's first computer programmer?

    Ada

    Did you know?

    Ada is named after Ada Lovelace, who wrote what is considered the first algorithm intended to be processed by a machine — Charles Babbage's Analytical Engine.

    From March 23, 2026
  74. In computing, what does the 'HTTP' status code 418 officially mean according to the IETF?

    I'm a teapot

    Did you know?

    HTTP 418 'I'm a teapot' was introduced as an April Fools' joke in 1998 in RFC 2324 for the Hyper Text Coffee Pot Control Protocol, yet it remains an officially recognized status code.

    From March 22, 2026