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- Aaron Sorkin
- Abel Tasman
- Abkhazia
- Abolitionism
- Abraham
- Abuse
- Acrobatics
- Acute bronchitis
- Adam Smith
- Addiction
- Addition
- Adult
- Advertising
- Aesthetics
- Aerial warfare
- Afghanistan
- Africa
- African Union
- Age of Discovery
- Age of Enlightenment
- Agnosticism
- Aircraft
- Akbar
- Akira Kurosawa
- Akrotiri and Dhekelia
- Åland Islands
- Alaska
- Albania
- Alberta
- Albrecht Dürer
- Alcohol
- Alcoholic beverage
- Alcoholism
- Aleksandr Pushkin
- Alexander Fleming
- Alexander Graham Bell
- Alexander the Great
- Alexandre Dumas
- Alfred Hitchcock
- Alfred Nobel
- Algebra
- Algeria
- Algorithm
- Ali
- Alkali
- Allah
- Alloy
- Alphabet
- Alps
- Aluminium
- Amazon River
- American football
- American Samoa
- Amphibian
- Anarchism
- Anatomy
- Ancient history
- Ancient Rome
- Andes
- Andorra
- Andrew Carnegie
- Andy Warhol
- Aneurysm
- Anger
- Angle
- Anglo-Zulu War
- Angola
- Anguilla
- Animal
- Animation
- Animism
- Anthrax
- Anthropology
- Antigua and Barbuda
- Antimony
- Antonín Dvořák
- Antonio Gramsci
- Ape
- Apple
- April
- Arabic language
- Arab League
- Arachnid
- Aral Sea
- Arch
- Archaeology
- Archduke Franz Ferdinand of Austria
- Architecture
- Arctic
- Arctic Ocean
- Aretha Franklin
- Argentina
- Aristophanes
- Aristotle
- Arithmetic
- Arizona
- Arkansas
- Armenia
- Armenian Genocide
- Army
- Arsenic
- Arthropod
- Arthur Miller
- Artificial intelligence
- Artillery
- Aruba
- Ascension Island
- Asexual reproduction
- Asia
- Association of Southeast Asian Nations
- Assyria
- Astatine
- Asthma
- Astrid Lindgren
- Astrology
- Astronomy
- Aswan Dam
- Atacama Large Millimeter Array
- Atheism
- Athens
- Athletics
- Atlantic Ocean
- Attila
- Atomic bombings of Hiroshima and Nagasaki
- Atomic number
- Attack on Pearl Harbor
- Auditory system
- August
- Augustine of Hippo
- Austria
- Automobile
- Autopsy
- Auto racing
- Avalanche
- Avicenna
- Axe
- Axiom
- Ayyavazhi
- Azerbaijan
- Aztec
- Badminton
- Bahá'u'lláh
- Bahrain
- Baltic Sea
- Banana
- Bangkok
- Barbados
- Barcelona
- Barium
- Barley
- Baroque music
- Baruch Spinoza
- Basalt
- Base (chemistry)
- BASIC
- Basketball
- Bat
- Battery (electricity)
- Battle
- Bear
- Beauty
- Bee
- Beer
- Beijing
- Belief
- Belize
- Benedict of Nursia
- Benin
- Benito Mussolini
- Benjamin Franklin
- Berkelium
- Berlin
- Berlin Wall
- Bermuda
- Bernhard Riemann
- Bertolt Brecht
- Bertrand Russell
- Beryllium
- Bhagavad Gita
- Bhutan
- Bible
- Bicycle
- Bill Gates
- Biochemistry
- Biological reproduction
- Biology
- Biopsy
- Biotechnology
- Bipolar disorder
- Birth control
- Bismuth
- Black
- Black Death
- Black hole
- Black Sea
- Blaise Pascal
- Bleeding
- Blindness
- Blood
- Blood pressure
- Blood test
- Blue
- Board game
- Boat
- Body Mass Index (BMI)
- Bohrium
- Bolivia
- Bollywood
- Bone fracture
- Book
- Boot loader
- Boron
- Bosnia and Herzegovina
- Botany
- Botswana
- Botulism
- Bow and arrow
- Boxer Rebellion
- Boxing
- Boy
- Brahman
- Brain damage
- Brain tumor
- Brass
- Brazil
- Bread
- Breast
- Breast cancer
- Bridge
- British Columbia
- British Empire
- British Raj
- British Virgin Islands
- Broadcasting
- Broadway theatre
- Bromine
- Bronze
- Bronze Age
- Brothers Grimm
- Bruce Lee
- Bruise
- Brunei
- Brussels
- BSD
- Bubonic plague
- Buckminster Fuller
- Buddhism
- Bulgaria
- Burkina Faso
- Burn
- Burundi
- Business
- Butter
- Butterfly
- C++
- Cadmium
- Caesium
- Cai Lun
- Cairo
- Calcium
- Calculator
- Calculus
- Californium
- Cambodia
- Camel
- Camera
- Canal
- Capacitance
- Capacitor
- Cape Verde
- Capital city
- Capital (economics)
- Capitalism
- Capital punishment
- Carbohydrate
- Carbon
- Card game
- Cardiac arrest
- Carl Friedrich Gauss
- Carl Sandburg
- Carolus Linnaeus
- Carrot
- Cartesian coordinate system
- Casimir Funk
- Caspian Sea
- Cat
- Catalysis
- Catherine II of Russia
- Catholicism
- Cattle
- Cavalry
- Cayman Islands
- Cello
- Central African Republic
- Cereal
- Cerium
- Chaos theory
- Charlemagne
- Charles Babbage
- Charles de Gaulle
- Charles Dickens
- Charles V, Holy Roman Emperor
- Charlie Chaplin
- Che Guevara
- Chemical bond
- Chemical compound
- Chemical reaction
- Chemotherapy
- Chickenpox
- Chicago
- Child
- Chile
- China (Republic of)
- Chinese character
- Chinese Civil War
- Chinese language
- Chlorine
- Chocolate
- Cholera
- Chordate
- Christiaan Huygens
- Christian Michelsen
- Christmas Island
- Christopher Columbus
- Christopher Wren
- Chromium
- Chronic bronchitis
- Church (congregation)
- Church (building)
- Circle
- Circulatory system
- Citizen journalism
- City
- Civics
- Civilization
- Civil law (legal system)
- Civil liberties
- Civil rights
- Civil rights movement
- Civil service
- Clarinet
- Classical mechanics
- Classical music
- Claudio Monteverdi
- Cleopatra VII
- Climate
- Clinical depression
- Clint Eastwood
- Clock
- Clothing
- Cloud
- Coal
- Cobalt
- Cocaine
- Cocos (Keeling) Islands
- Cola
- Cold War
- College
- Colombia
- Colon (anatomy)
- Colorado
- Colorectal cancer
- Colosseum
- Colossus of Rhodes
- Columba
- Coma
- Comedy
- Comics
- Common cold
- Common law
- Commonwealth of Independent States
- Commonwealth of Nations
- Communication
- Communism
- Communism in North Korea
- Community
- Compact disc
- Company (law)
- Compass
- Complex number
- Computer monitor
- Computer science
- Confucianism
- Confucius
- Congress of Vienna
- Connecticut
- Consciousness
- Conservation of mass
- Conservatism
- Constantine I
- Constitution
- Continent
- Contract
- Cooking
- Cook Islands
- Coordinates (mathematics)
- Copenhagen
- Corporation
- Costa Rica
- Côte d'Ivoire
- Cotton
- Council of Europe
- Counter-Reformation
- Country
- Country music
- Courtship
- Covalent bond
- Crime
- Crimean War
- Criminal law
- Crusades
- Crust (geology)
- Cryptography
- Crystal
- Cuba
- Cuban Missile Crisis
- Cuisine
- Culture
- Curium
- Currency
- Current (electricity)
- Curriculum
- Cyprus
- Cyrillic alphabet
- Dam
- Dance
- Dante Alighieri
- Dashiell Hammett
- Daughter
- David Hilbert
- Day
- Dead Sea
- Death
- Declaration of the Establishment of the State of Israel
- Decline of the Roman Empire
- Decolonization
- Deforestation in Brazil
- Degree (angle)
- Deism
- Deity
- Delaware
- Delusion
- Dementia
- Democracy
- Democratic Republic of the Congo
- Demographics
- Dengue fever
- Dennis Ritchie
- Dentistry
- Depression (mood)
- Derivative
- Desert
- Design
- Determinism
- Detroit, Michigan
- Diabetes mellitus
- Diagnosis
- Dialect
- Dialectic
- Diana, Princess of Wales
- Dice
- Dictatorship
- Diego Velázquez
- Dietary supplement
- Differential equation
- Digestion
- Diode
- Diophantus
- Diphtheria
- Diplomacy
- Disability
- Discrimination
- Disease
- Division (mathematics)
- DNA test
- Dog
- Dolphin
- Dome
- Dominica
- Dominican Republic
- Donald Knuth
- Donald Trump
- Don Quixote
- Dove
- Draughts
- Drawing
- Dream
- Drink
- Drinking water
- Drug
- Drug addiction
- Drum
- Dubnium
- Du Fu
- Dynamite
- Dysentery
- Dysprosium
- Eagle
- Ear
- Earth's atmosphere
- Earth science
- Eastern Orthodox Church
- Eastern philosophy
- East Timor
- East-West Schism
- Ebola
- Eclipse
- Ecology
- Economics
- Ecosystem
- Ecuador
- Edinburgh
- Edmund Hillary
- Edna St. Vincent Millay
- Education
- Edvard Grieg
- Edward Gibbon
- Edward Jenner
- Egg (food)
- Eiffel Tower
- Eighty Years' War
- Einsteinium
- Eleanor Roosevelt
- Electrical resistance
- Electric charge
- Electricity
- Electric motor
- Electrocardiogram
- Electrolysis
- Electromagnetic radiation
- Electromagnetism
- Electron
- Electronics
- Elementary particle
- Elephant
- Elevator
- Elizabeth II of the United Kingdom
- El Niño
- El Niño-Southern Oscillation
- El Salvador
- Elvis Presley
- e (mathematical constant)
- Émile Durkheim
- Emilia Plater
- Emily Dickinson
- Emma Goldman
- Emotion
- Emperor Taizong of Tang
- Empire State Building
- Employment
- Empress Dowager Cixi
- Encephalitis
- Endangered species
- Endocrine system
- Endoscopy
- Energy
- Engine
- Engineering
- English Civil War
- Enrico Fermi
- Entertainment
- Environmentalism
- Environmental management
- Epic of Gilgamesh
- Epistemology
- Equation
- Equatorial Guinea
- Erbium
- Eritrea
- Ernest Hemingway
- Ernest Rutherford
- Erosion
- Esperanto
- Ethics
- Ethiopia
- Euclid
- Eukaryote
- Euro
- European colonization of the Americas
- European integration
- Europium
- Euthanasia
- Eva Perón
- Excommunication
- Existence
- Existentialism
- Experience
- Explosive material
- Exponentiation
- Extinction
- Extraterrestrial life
- Eye
- Eye examination
- Ezra Pound
- Fahrenheit
- Falkland Islands
- Fall of Constantinople
- Family
- Faroe Islands
- Fascism
- Fashion
- Father
- Fatty acid
- Fear
- February
- Federated States of Micronesia
- Female
- Feminism
- Fencing
- Ferdinand Magellan
- Fermium
- Festival
- Fiction
- Fidel Castro
- Fiji
- Film
- Finance
- Finland
- Fire
- Firearm
- First Sino-Japanese War
- Fishing
- Fixed-wing aircraft
- Flint
- Flood
- Florence
- Florence Nightingale
- Flour
- Flower
- Fluorine
- Flute
- Folk music
- Food
- Foodborne illness
- Food groups
- Foot (unit of length)
- Force
- Forestry
- Fork
- Formula One
- Fossil fuel
- Fractal
- Fraction (mathematics)
- Frances Marion
- Francis Bacon
- Francisco Goya
- Francis Drake
- Francis of Assisi
- Franco-Prussian War
- Frankfurt
- Frank Lloyd Wright
- Frank Sinatra
- Franz Kafka
- Fred Astaire
- Frederick Douglass
- Frederick II, Holy Roman Emperor
- Frederick II of Prussia
- Freedom
- Freedom (political)
- Free will
- French horn
- French language
- French Polynesia
- French Revolution
- French Revolutionary Wars
- Frequency
- Frida Kahlo
- Friday
- Friedrich Nietzsche
- Fritz Lang
- Frostbite
- Fruit
- F. Scott Fitzgerald
- Function (mathematics)
- Fundamentalism
- Furniture
- Fyodor Dostoevsky
- Gabon
- Gadolinium
- Galileo Galilei
- Gallium
- Gallon
- Gambling
- Game
- Gamelan
- Game theory
- Gamma ray
- Gangrene
- Gas
- Gasoline
- Gautama Buddha
- Gavrilo Princip
- Gene
- General relativity
- Genetic Engineering
- Genetics
- Geneva Conventions
- Genghis Khan
- Geography
- Geologic fault
- Geology
- Geometry
- George Bernard Shaw
- George Byron, 6th Baron Byron
- George Lucas
- George W. Bush
- George Westinghouse
- Georgia (country)
- Georgia O'Keeffe
- Georg Wilhelm Friedrich Hegel
- Geothermal power
- Gerhard Schröder
- Germaine Greer
- Germanium
- German language
- German reunification
- Gerontology
- Ghana
- G. H. Hardy
- Gibraltar
- Girl
- Giuseppe Verdi
- Glacier
- Glass
- Glasses
- Globalization
- Global Positioning System
- Gnosticism
- Gobi Desert
- Go (board game)
- God
- Goddess
- Golda Meir
- Golden Temple
- Gonorrhea
- Good (economics and accounting)
- Gottfried Leibniz
- Government
- Grammar
- Grand Canyon
- Grape
- Graphite
- Great Depression
- Great Famine (Ireland)
- Great Lakes
- Great Leap Forward
- Great Northern War
- Great Observatories program
- Great Purge
- Great Pyramid of Giza
- Great Rift Valley
- Great Wall of China
- Greece
- Greek alphabet
- Greek language
- Green
- Greenland
- Gregorian calendar
- Gregor Mendel
- Grenada
- Gro Harlem Brundtland
- Group theory
- Guatemala
- Guernsey
- Guerrilla warfare
- Guglielmo Marconi
- Guinea
- Guinea-Bissau
- Guitar
- Gulf War
- Gunpowder
- Guru Gobind Singh
- Guru Granth Sahib
- Guru Nanak Dev
- Gustatory system
- Gustav Mahler
- Guyana
- Gyroscope
- Hafnium
- Hail
- Haile Selassie I of Ethiopia
- Haiti
- Haitian Revolution
- Half-life
- Hallucination
- Hamilcar Barca
- Hand, foot and mouth disease
- Handgun
- Han Dynasty
- Hanging Gardens of Babylon
- Hannibal
- Hanoi
- Hans Christian Andersen
- Hans Christian Ørsted
- Hans Morgenthau
- Happiness
- Hard disk
- Harmony
- Harp
- Harriet Tubman
- Harvard University
- Hastings Banda
- Hate
- Hawaii
- Health
- Health care
- Hearing impairment
- Hearing test
- Heart
- Heart disease
- Heat
- Heavy metal music
- Hebrew language
- Helen Keller
- Helicopter
- Henrik Ibsen
- Henri Matisse
- Henri Poincaré
- Henry David Thoreau
- Henry VIII of England
- Heraclius
- Heredity
- Hernán Cortés
- Herodotus
- Herpes simplex
- Hertz
- Heterosexuality
- H. G. Wells
- Hildegard of Bingen
- Himalayas
- Hindi
- Hip hop music
- Hirohito
- History
- History of Africa
- History of art
- History of Australia
- History of China
- History of Earth
- History of Europe
- History of Iran
- History of Japan
- History of literature
- History of music
- History of Russia
- History of South Africa in the apartheid era
- History of technology
- History of the Americas
- History of the European Union
- History of the Middle East
- History of the People's Republic of China
- History of the Republic of India
- History of the United States
- Hobby
- Ho Chi Minh
- Hockey
- Holiday
- Holmium
- Holy Roman Empire
- Homer
- Homosexuality
- Honduras
- Honey
- Hormone
- Horse
- House
- Howard Hughes
- HTML
- HTTP
- Hubble Space Telescope
- Human evolution
- Human history
- Humanism
- Humanities
- Human rights
- Human sexuality
- Humphrey Bogart
- Hundred Years' War
- Hungary
- Husband
- Hydrochloric acid
- Hydrogen bond
- Hydropower
- Hygiene
- Hypatia of Alexandria
- Hypertension
- Hypoxia (medical)
- Ibn Battuta
- Ibn Khaldun
- Ice hockey
- Idaho
- Idealism
- Ignacy Łukasiewicz
- Igneous rock
- Iliad
- Illness
- Illinois
- Immanuel Kant
- Imperialism
- Imperial unit
- Inca Empire
- Incandescent light bulb
- Inclined plane
- Indiana
- The Emergency (India)
- Indian independence movement
- Indian Ocean
- Indian Rebellion of 1857
- Indian Rupee
- Indira Gandhi
- Indium
- Inductance
- Inductor
- Industrial Revolution
- Industry (economics)
- Indus Valley Civilization
- Infant
- Infantry
- Infectious disease
- Infinity
- Inflammation
- Influenza
- Information
- Information Age
- Information technology
- Infrared
- Ingmar Bergman
- Injury
- Inorganic chemistry
- Insect
- Integer
- Integral
- Integrated circuit
- Integumentary system
- Intermolecular force
- Internal combustion engine
- International Atomic Energy Agency
- International Court of Justice
- International Criminal Court
- International Monetary Fund
- International Red Cross and Red Crescent Movement
- International Space Station
- International System of Units
- Internet
- Interpersonal relationship
- Interpol
- Iodine
- Ion
- Ionic bond
- Iowa
- Iranian revolution
- Iran
- Iraq
- Iridium
- Iron Age
- Iron Curtain
- Irrigation
- Isaac Asimov
- Isaiah Berlin
- Islamic conquest of Persia
- Islamic Golden Age
- Isotope
- Istanbul
- Italian unification
- Italy
- Ivan IV of Russia
- Ivan Pavlov
- Jabir ibn Hayyan
- Jackson Pollock
- Jacksonville, Florida
- Jacques Cartier
- Jacques Chirac
- Jacques Derrida
- Jainism
- Jakarta
- Jalal ad-Din Muhammad Rumi
- Jamaica
- James Clerk Maxwell
- James Cook
- James Watt
- Jane Austen
- January
- Japanese yen
- Java programming language
- Jazz
- Jean-Paul Sartre
- Jean Sibelius
- Jersey
- Jesse Owens
- Jesus
- Jet engine
- Johannes Vermeer
- Johann Gutenberg
- Johann Wolfgang Goethe
- John Calvin
- John Locke
- John Logie Baird
- John Maynard Keynes
- John Milton
- John Rawls
- John Wayne
- Jordan
- Jorge Luis Borges
- Joseph Fourier
- Joseph Lister, 1st Baron Lister
- Joseph Stalin
- Josip Broz Tito
- Journalism
- Józef Piłsudski
- J. R. R. Tolkien
- Juan Sebastián Elcano
- Judaism
- Judiciary
- Judo
- Jules Verne
- July
- June
- Jurisprudence
- Justice
- Kansas
- Karate
- Karl Benz
- Karl Marx
- Kazakhstan
- Kelvin
- Kenya
- Kerosene
- Keyboard (computing)
- Kinetic energy
- Kiribati
- Knife
- Knowledge
- Kofi Annan
- Korean War
- Kosovo
- Krishna
- Kurt Gödel
- Kuwait
- Kwame Nkrumah
- Kyrgyzstan
- Lake Baikal
- Lake Erie
- Lake Huron
- Lake Michigan
- Lake Ontario
- Lake Superior
- Lake Tanganyika
- Lake Titicaca
- Lake Victoria
- Langston Hughes
- Language
- Lanthanum
- Laos
- Las Vegas, Nevada
- Laser
- Latin alphabet
- Latin America
- Latvia
- Lawrencium
- Lead
- Leaning Tower of Pisa
- Learning
- Lebanon
- Lech Wałęsa
- Le Corbusier
- Lee Kuan Yew
- Legal history
- Legume
- Leif Ericson
- Leisure
- Lemon
- Leni Riefenstahl
- Lens (optics)
- Leon Trotsky
- Leo Tolstoy
- Leprosy
- Lesotho
- Letter (alphabet)
- Leukemia
- Lever
- Li Bai
- Liberalism
- Liberia
- Liechtenstein
- Life
- Light
- Lighthouse of Alexandria
- Light-year
- Limestone
- Limit (mathematics)
- Linear algebra
- Line (mathematics)
- Linguistics
- Linus Pauling
- Linus Torvalds
- Lipid
- Liquid
- Literacy
- Literature
- Lithium
- Litre
- Little Ice Age
- Logarithm
- Logic
- Logical positivism
- Loire River
- London Stock Exchange
- Lord Byron
- Louis Daguerre
- Louisiana
- Louis Pasteur
- Louis XIV of France
- Love
- Lucrezia Borgia
- Ludwig Mies van der Rohe
- Ludwig Wittgenstein
- Lumbar puncture
- Lung
- Lutetium
- Luxembourg
- Lyme disease
- Lymphoma
- Macau
- Macedon
- Machine gun
- Mac OS
- Macroeconomics
- Madagascar
- Madonna (entertainer)
- Madrid
- Magazine
- Magic (supernatural)
- Magma
- Magna Carta
- Magnesium
- Magnetic resonance imaging
- Mahabharata
- Mahathir bin Mohamad
- Mahayana
- Maimonides
- Maize
- Major League Baseball
- Malaria
- Malawi
- Malaysia
- Maldives
- Male
- Malnutrition
- Mammal
- Mammoth
- Man
- Management
- Mancala
- Manganese
- Manhattan Project
- Manila
- Manitoba
- Mantle (geology)
- Manufacturing
- Mao Zedong
- Map
- Marcel Proust
- March
- Marco Polo
- Margaret Sanger
- Margaret Thatcher
- Maria Theresa of Austria
- Marie Curie
- Marilyn Monroe
- Market
- Marketing
- Mark Twain
- Marlene Dietrich
- Marlon Brando
- Marriage
- Marshall Islands
- Martial arts
- Martin Luther King, Jr.
- Martin Scorsese
- Marxism
- Mary I of Scotland
- Mary Harris Jones
- Mary Shelley
- Mass
- Massachusetts
- Mass media
- Materialism
- Mathematical analysis
- Mathematical constant
- Mathematical induction
- Mathematical logic
- Mathematical proof
- Mathematics
- Matrix (mathematics)
- Matsuo Bashō
- Matter
- Mauritania
- Mauritius
- Maurya Empire
- Mausoleum of Maussollos
- Max Planck
- May
- Mayotte
- Measles
- Measurement
- Meat
- Mecca
- Mechanical engineering
- Medical procedure
- Medical test
- Medication
- Medicine
- Meditation
- Mediterranean Sea
- Meiji Restoration
- Meitnerium
- Melanoma
- Melbourne
- Melody
- Mendelevium
- Meningitis
- Mental illness
- Mental retardation
- Mercury (element)
- Mesoamerica
- Mesopotamia
- Metabolism
- Metal
- Metallic bond
- Metallurgy
- Metaphysics
- Meteorology
- Metric system
- Mexican-American War
- Mexico
- Mexico City
- Miami, Florida
- Michael Faraday
- Michelangelo
- Michel Foucault
- Microeconomics
- Microphone
- Microscope
- Microsoft Windows
- Middle Ages
- Middle East
- Miguel de Cervantes
- Mikhail Baryshnikov
- Mikhail Gorbachev
- Milan
- Mile
- Military
- Milk
- Milky Way
- Milton Friedman
- Mind
- Mineral
- Ming Dynasty
- Mining
- Mining in South Africa
- Minoan civilization
- Mississippi
- Missouri
- Mobile phone
- Modern history
- Modernism
- Molière
- Molybdenum
- Monaco
- Mona Lisa
- Monarchy
- Monday
- Money
- Mongol Empire
- Mongolia
- Monism
- Montana
- Montenegro
- Month
- Montserrat
- Moon landing
- Morality
- Morocco
- Moscow
- Moscow Kremlin
- Moses
- Mother
- Motherboard
- Mother Teresa
- Motion (physics)
- Motorcycle
- Mountain
- Mount Everest
- Mount Kilimanjaro
- Mouse (computing)
- Mozambique
- Mughal Empire
- Muhammad
- Muhammad Ali
- Muhammad ibn Mūsā al-Khwārizmī
- Multiplication
- Mumbai
- Mumps
- Munich
- Murasaki Shikibu
- Mushroom poisoning
- Music
- Musical instrument
- Musical notation
- Music theory
- Mustafa Kemal Atatürk
- Myanmar
- Mysticism
- Mythology
- Nagarjuna
- Nagorno-Karabakh
- Nail (engineering)
- Nairobi
- Namibia
- Nanotechnology
- Napoleonic Wars
- Napoleon I of France
- NASCAR
- Nasdaq
- Nashville, Tennessee
- Nasir al-Din Tusi
- National Basketball Association
- National Football League
- National Health Service
- Nationalism
- NATO
- Natural disaster
- Naturalism (philosophy)
- Natural number
- Natural science
- Natural selection
- Nature
- Naval warfare
- Navy
- Nazi Germany
- Nefertiti
- Neil Armstrong
- Nelson Mandela
- Neodymium
- Neolithic Revolution
- Nepal
- Neptunium
- Nervous system
- Netherlands Antilles
- Neutrino
- Neutron
- Nevada
- New Brunswick
- New Caledonia
- New Delhi
- Newfoundland
- New Imperialism
- New Jersey
- New Mexico
- News
- New South Wales
- Newspaper
- Isaac Newton
- Newton's laws of motion
- New York Stock Exchange
- New Zealand
- Niagara Falls
- Nicaragua
- Niccolò Machiavelli
- Nickel
- Nicolas Poussin
- Nicolaus Copernicus
- Nicotine
- Niels Bohr
- Niger
- Nigeria
- Night Watch (painting)
- Nihilism
- Nile
- Nitrogen
- Niue
- Nobelium
- Nobel Prize
- Noh
- Norfolk Island
- North America
- North Dakota
- Northern Ireland
- Northern Mariana Islands
- Northern Territory
- North Korea
- North Pole
- Northwest Indian War
- Northwest Territories
- Norway
- Noun
- Nova Scotia
- Novel
- November
- Nuclear power
- Nuclear technology
- Number
- Number theory
- Numerical digit
- Nunavut
- Nut (fruit)
- Nutrition
- Oat
- Obesity
- Objectivism (Ayn Rand)
- Ocean
- Oceania
- Oceanography
- October
- Odyssey
- Ohm
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- Percentage
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- Philip II of Spain
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- Spear
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- Spiritual practice
- Spoon
- Sport
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- Square root
- Sri Lanka
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- Standard Model
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- String (computer science)
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- Strong interaction
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- TCP
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- Ted Turner
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- The Bahamas
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- The Communist Manifesto
- The Gambia
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- Theism
- The Lord of the Rings
- Theocracy
- Theory of relativity
- Theravada
- Thermodynamics
- The Scream
- The Thinker
- Thomas Becket
- Thomas Edison
- Thomas Hobbes
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- Thomas Malthus
- Thomas Mann
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- Thorium
- Thought
- Thulium
- Thursday
- Tiananmen Square protests of 1989
- Tim Berners-Lee
- Time
- Time zone
- Timur
- Tin
- Tobacco
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- Tomato
- Ton
- Tonga
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- Topology
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- Transnistria
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- Treaty of Paris (1814)
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- Tree
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- Triangle
- Trigonometry
- Trinidad and Tobago
- Trinity
- Tristan da Cunha
- Triton (moon)
- Trombone
- Trumpet
- Truth
- T. S. Eliot
- Tsunami
- Tuba
- Tuesday
- Tumor
- Tungsten
- Tunisia
- Turkish Republic of Northern Cyprus
- Turkmenistan
- Turks and Caicos Islands
- Tuvalu
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- Typewriter
- Typhoid fever
- Typhus
- Uganda
- Ultraviolet
- Umar
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- Unitarianism
- United Arab Emirates
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- United States Virgin Islands
- Universal Declaration of Human Rights
- Universe
- University
- University of Cambridge
- University of Oxford
- Unix
- Ununpentium
- Ununquadium
- Ununseptium
- Ununtrium
- Upanishad
- Urine test
- Uruguay
- User interface
- Utah
- Utilitarianism
- Uzbekistan
- Vaccine
- Vagina
- Vajrayana
- Vanadium
- Vanuatu
- Variable (mathematics)
- Vasco da Gama
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- Vedanta
- Vedas
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- Verb
- Victor Hugo
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- Victoria of the United Kingdom
- Video
- Video game
- Vietnam
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- Vikings
- Viking Age
- Viola
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- Vishnu
- Visible spectrum
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- Visual spectrum
- Visual system
- Vitruvius
- Vitus Bering
- Vladimir Arnold
- Vladimir Lenin
- Vladimir Putin
- Volcano
- Volleyball
- Volt
- Voltaire
- Volume
- Wales
- Wallis and Futuna
- Wall Street Crash of 1929
- Walt Disney
- Walt Whitman
- Walter Scott
- War
- War of the Austrian Succession
- War of the Spanish Succession
- Warsaw
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- Water polo
- Watt
- W. B. Yeats
- Weak interaction
- Weapon
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- Web browser
- Wedge
- Wednesday
- Week
- Weight
- Weight loss
- Western Australia
- Western philosophy
- Western Sahara
- West Nile virus
- West Virginia
- Whale
- Wheel
- White
- Wife
- Wildlife of Brazil
- Wilhelm Conrad Röntgen
- Wilhelm II of Germany
- Willem Barents
- William Blake
- William Hogarth
- Wind power
- Winston Churchill
- Woman
- Women's suffrage
- Wood
- Woodwind
- Woody Allen
- Word
- World Bank Group
- World Health Organization
- World peace
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- World War II
- World Wide Web
- Worship
- Wound
- Wounded Knee Massacre
- Wrestling
- Wright brothers
- Writing
- Wyoming