What makes the Library different: a correct answer is only the start. trivolivia shows the explanation immediately and keeps its supporting sources one tap away.
All trivia topics
Each topic contains ten questions with a range of difficulty. Choose one in the app or let Endless Mix move between them.
🪐 Space and Astronomy
Planets, moons, stars, and spaceflight.
🦎 Animal Biology
Distinctive animal anatomy and behavior.
🫀 The Human Body
Human anatomy and physiology.
🌍 Earth Systems
Geology, oceans, weather, and planetary motion.
🔬 Microscopic Life
Microorganisms and other small-scale life.
🎬 Film Production
Practical effects, sound design, and animation.
🎵 Music History
Instruments, compositions, and recordings.
🖼️ Art Details
Details and contexts in well-known works of art.
📚 Books and Their Origins
Origins and production details behind well-known books.
🧳 Word Origins
The stories behind familiar English words.
⏳ Historical Context
Documented events and chronological comparisons.
🗺️ Geographic Perspectives
Geographic relationships that conventional maps can obscure.
🍽️ Food Origins and Science
Origins and scientific properties of familiar foods.
💡 Accidental Inventions
Inventions that emerged from unintended results.
🔍 Everyday Object Design
The purpose and history of common design details.
🌐 Internet Origins
The origins of familiar internet terms, symbols, and systems.
🎲 Game Design and History
The origins and design of familiar games.
🔢 Mathematical Patterns
Probability, geometry, and number theory.
🐉 Mythological Creatures
Creatures and figures in their original mythological traditions.
🤯 Scientific Phenomena
Surprising facts explained by structures and physical processes.
A five-question sample round
Pick an answer before opening each explanation. These are real trivolivia Library questions, including the sources shown after an answer in the game.
1 · Space and Astronomy
Which color appears closest to the Sun during a Martian sunset?
- Orange
- White
- Blue
- Green
Show the answer and sources
Answer: Blue. A blue glow appears around the Sun during a Martian sunset.
Fine Martian dust scatters light differently from Earth’s air, letting blue light stay concentrated near the setting Sun while the wider sky looks reddish.
Sources: NASA Space Place and Smithsonian National Air and Space Museum.
2 · Animal Biology
How many hearts does an octopus have?
- One
- Two
- Three
- Four
Show the answer and sources
Answer: Three. An octopus has three hearts.
Two hearts send blood through the gills, while a third pumps it around the body. Its copper-based hemocyanin makes that blood appear blue.
Sources: Smithsonian Ocean and NOAA Ocean Service.
3 · Word Origins
The word robot came through Czech from robota, which is closest in meaning to what?
- A clockwork toy
- A clever servant
- Forced labor
- A metal machine
Show the answer and sources
Answer: Forced labor. Robot derives from a word for forced labor.
Karel Čapek’s 1920 play popularized robot for artificial workers. The term came from Czech robota, meaning forced labor or drudgery.
Sources: Merriam-Webster and Science Museum.
4 · Accidental Inventions
How did the adhesive created during development of Post-it Notes behave?
- Harden only underwater
- Conduct electricity
- Stick lightly and peel away
- Glow under ultraviolet light
Show the answer and sources
Answer: Stick lightly and peel away. The adhesive could be removed and reused.
3M chemist Spencer Silver created small adhesive spheres that gripped surfaces without forming a permanent bond. Art Fry later used the adhesive to keep bookmarks in place in his hymnal.
Sources: American Chemical Society and Lemelson-MIT Program.
5 · Mathematical Patterns
When two fair six-sided dice are rolled, which total can be produced by the most ordered outcomes?
- 5
- 6
- 7
- 8
Show the answer and sources
Answer: 7. Seven has six of the 36 possible ordered outcomes.
The pairs 1+6 through 6+1 all total 7, giving six of the 36 equally likely outcomes. No other total has as many routes.
Sources: Portland Community College and University of California, Berkeley.
How the questions are checked
Each built-in card is reviewed for a clear answer, a concise explanation, and two distinct HTTPS sources that support the claim. The Library focuses on evergreen subjects; date-sensitive trivia is handled separately in Today’s News.
Read the complete editorial method and corrections policy. Ready for a new set? Open trivolivia and choose Library, or read the how-to-play guide.