Lists worth memorizing.
Triviadub is a clean, growing reference for the facts trivia lovers actually want to know - alphabets, capitals, presidents, the periodic table, and more. Study tools are on the way.
Categories
Language & Codes
View allCommon Latin Phrases
Latin phrases and abbreviations that show up in everyday English.
20 entries
Greek & Latin Roots
Common word roots that unlock the meaning of thousands of English words.
20 entries
Greek Alphabet
All 24 letters of the Greek alphabet with their names and Latin transliterations - the symbols behind math, science, and fraternities.
24 entries
Morse Code
International Morse code for every letter and digit - dots and dashes for A–Z and 0–9.
36 entries
NATO Phonetic Alphabet
The 26 code words used to spell letters unambiguously over radio and telephone - Alfa, Bravo, Charlie, and the rest.
26 entries
Roman Numerals
The Roman numeral symbols and the subtractive forms - everything you need to read any numeral.
13 entries
Geography
View allCountries & Capitals
Every sovereign country and its capital city, grouped by continent - the backbone of world geography.
195 entries
Longest Rivers in the World
The ten longest rivers on Earth and the continents they cross.
10 entries
The Continents
The seven continents by area, population, and number of countries.
7 entries
The Oceans
The five oceans of the world, by size and depth.
5 entries
The Seven Summits
The highest mountain on each of the seven continents - the mountaineer's ultimate checklist.
7 entries
U.S. States & Capitals
All 50 United States with their capitals, postal abbreviations, and year of statehood.
50 entries
History & Politics
View allMajor Wars in History
A chronological tour of the conflicts that reshaped the world.
16 entries
The Twelve Caesars
The rulers chronicled in Suetonius - from Julius Caesar to Domitian.
12 entries
U.K. Prime Ministers (since 1900)
Every British Prime Minister from 1900 to today, with party and years.
27 entries
U.S. Cabinet Departments
The fifteen executive departments of the U.S. federal government.
15 entries
U.S. Constitutional Amendments
All 27 amendments to the U.S. Constitution, what each one does, and the year it was ratified.
27 entries
U.S. Federal Holidays
The eleven federal holidays in the United States - when they fall and when each became official.
11 entries
U.S. Presidents
Every President of the United States in order, with party and years in office - links out to each biography.
47 entries
Science & Nature
View allFirst 20 Elements
The first twenty chemical elements - the ones worth memorizing in order, with symbols and categories.
20 entries
Geologic Time Periods
The twelve periods of the Phanerozoic eon, from the Cambrian to today.
12 entries
Human Body Systems
The eleven organ systems that keep the human body running.
11 entries
Metric (SI) Prefixes
The SI prefixes from quetta to quecto, with symbols and powers of ten.
24 entries
Mohs Hardness Scale
The ten reference minerals that rank scratch hardness from talc to diamond.
10 entries
Planets of the Solar System
The eight planets in order from the Sun, with their type, moon count, and distance.
8 entries
SI Base Units
The seven base units of the International System of Units that every other unit is built from.
7 entries
Taxonomic Ranks
The major ranks of biological classification, from broadest to most specific, with the human example.
8 entries
The Noble Gases
Group 18 of the periodic table - the famously unreactive elements.
6 entries
Arts & Culture
View allBest Picture Winners (21st century)
Academy Award Best Picture winners from 2001 to the present.
25 entries
Chinese Zodiac
The twelve animals of the Chinese zodiac, in order, with recent years and traits.
12 entries
Major Art Movements
Western art from the Renaissance to Pop Art, with the artists who defined each era.
13 entries
New Seven Wonders of the World
The seven winners of the 2007 global vote for the modern wonders.
7 entries
Seven Wonders of the Ancient World
The classical seven wonders, where they stood, and roughly when they were built.
7 entries
The Nine Muses
The Greek goddesses who inspired the arts and sciences.
9 entries
The Twelve Olympians
The principal gods of Greek mythology, their Roman counterparts, and what they ruled over.
12 entries
Zodiac Signs
The twelve astrological signs with their symbols, elements, and date ranges.
12 entries