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[edit]A
[edit]- 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
B
[edit]- 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
[edit]- 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
D
[edit]- 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
E
[edit]- 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
F
[edit]- 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
G
[edit]- 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
H
[edit]- 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)
I
[edit]- 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
J
[edit]- 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
K
[edit]- 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
L
[edit]- 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
M
[edit]- 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
N
[edit]- 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
O
[edit]- Oat
- Obesity
- Objectivism (Ayn Rand)
- Ocean
- Oceania
- Oceanography
- October
- Odyssey
- Ohm
- Oil
- Ole Rømer
- Olfactory system
- Olympic Games
- Oman
- Ontology
- OPEC
- Opera
- Operating system
- Opium
- Opium Wars
- Optics
- Orange (fruit)
- Orbit
- Orchestra
- Oregon
- Organic chemistry
- Organic compound
- Organisation for Economic Co-operation and Development
- Organism
- Organization for Security and Co-operation in Europe
- Organization of American States
- Organ (music)
- Organ transplant
- Origin of life
- Osama bin Laden
- Oscar Wilde
- Osmium
- Ottoman Empire
- Outer space
P
[edit]- Pablo Neruda
- Pablo Picasso
- Pacific Ocean
- Painting
- Pakistan
- Palau
- Palestinian territories
- Palladium
- Palliative care
- Panama
- Panama Canal
- Panentheism
- Pantheism
- Paper
- Pap smear
- Papua New Guinea
- Paraguay
- Paris
- Paris Agreement
- Parthenon
- Particle accelerator
- Partition of India
- Partitions of Poland
- Party
- Pasteurization
- Paul the Apostle
- Peace
- Pearl Harbor
- Pelé
- Pendulum
- Penicillin
- Penis
- Pennsylvania
- People's Republic of China
- Percentage
- Performing arts
- Persian Empire
- Persistent vegetative state
- Personal life
- Pertussis
- Peter I of Russia
- Petroleum
- Phase (matter)
- Philadelphia, Pennsylvania
- Philip II of Spain
- Philippine-American War
- Philippines
- Philosophy
- Philosophy of science
- Phoenician alphabet
- Phosphorus
- Photography
- Photosynthesis
- PHP
- Physical cosmology
- Physical examination
- Physical exercise
- Physical fitness
- Physical trauma
- Physician
- Physics
- Piano
- Pierre de Fermat
- Pierre-Simon Laplace
- Pig
- Pitcairn Islands
- Plane (mathematics)
- Plant
- Plasma (physics)
- Plastic
- Plate tectonics
- Platinum
- Plato
- Platonic realism
- Playing card
- Plough
- Plutonium
- Poetry
- Poison
- Police
- Polish-Lithuanian Commonwealth
- Polish-Soviet War
- Political party
- Political science
- Politics
- Pollution
- Polonium
- Pol Pot
- Pope
- Pope Benedict XVI
- Pope John Paul II
- Pop music
- Pornography
- Portuguese language
- Positivism
- Postmodernism
- Potassium
- Potato
- Potential energy
- Pottery
- Poultry
- Pound (mass)
- Pound sterling
- Poverty
- Pragmatism
- Praseodymium
- Prayer
- Precipitation (meteorology)
- Pre-Columbian era
- Pregnancy
- Prehistory
- Prescription drug
- Prime number
- Prince Edward Island
- Princeton University
- Printing
- Printing press
- Prion
- Prism (optics)
- Privacy
- Probability
- Probability theory
- Processor (computing)
- Programming language
- Project Apollo
- Promethium
- Pronunciation
- Protactinium
- Protein
- Protestantism
- Protist
- Proton
- Psychology
- Psychosis
- Ptolemy
- Publishing
- Puerto Rico
- Pulley
- Pulse
- Punic Wars
- Punjabi language
- Pyramid
- Pythagoras
Q
[edit]R
[edit]- Rabies
- Racism
- Radar
- Radian
- Radiation
- Radiation therapy
- Radio
- Radiology
- Radon
- Rail transport
- Rain
- Rainer Maria Rilke
- Rainforest
- RAM
- Ramakrishna
- Raphael
- Rapid transit
- Rationalism
- Rational number
- Reactance
- Reality
- Real number
- Recreation
- Red
- Reductio ad absurdum
- Reductionism
- Refining
- Reflex test
- Reformation
- Refrigerator
- Reggae
- Relativism
- Religion
- Religion in Ancient Rome
- Renaissance
- Renewable energy
- Renminbi
- Reproductive system
- Reptile
- Republic
- Republic of China (Taiwan)
- Republic of Macedonia
- Republic of Moldova
- Republic of the Congo
- Republic (Plato)
- Resistor
- Respiration (physiology)
- Respiratory failure
- Respiratory system
- Revolutions of 1848
- Rhetoric
- Rhode Island
- Rhodium
- Rhythm
- Rhythm and blues
- Rice
- Richard Feynman
- Richard Stallman
- Richard Wagner
- Rifle
- Rio de Janeiro
- River
- Roald Amundsen
- Robert Louis Stevenson
- Robot
- Rock (geology)
- Rock and roll
- Rocket
- Rock music
- Rocky Mountains
- Roentgenium
- Roman Catholic Church
- Roman Empire
- Romania
- Roman-Persian Wars
- Romanticism
- Rome
- Rosa Luxemburg
- Rubber
- Rubidium
- Rugby football
- Ruhollah Khomeini
- Rupee
- Russia
- Russian Civil War
- Russian Empire
- Russian language
- Russian Revolution of 1905
- Russian Revolution of 1917
- Russo-Japanese War
- Ruthenium
- Rutherfordium
S
[edit]- Sahara
- Sailing
- Saint Helena
- Saint Kitts and Nevis
- Saint Lucia
- Saint Petersburg
- Saint-Pierre and Miquelon
- Saint Vincent and the Grenadines
- Saladin
- Salt
- Samarium
- Samoa
- Sam Walton
- San Antonio, Texas
- San Jose, California
- San Marino
- Sanskrit
- São Paulo
- São Tomé and Príncipe
- Sappho
- Sardar Vallabhbhai Patel
- Saskatchewan
- Satellite
- Saturday
- Saudi Arabia
- Scabies
- Scandium
- Scarlet Fever
- Schizophrenia
- School
- Scientific classification
- Scientific method
- Scramble for Africa
- Screw
- Sculpture
- Sea
- Seaborgium
- Seafood
- Sears Tower
- Second
- Second Boer War
- Second Sino-Japanese War
- Sedimentary rock
- Selenium
- Seljuq dynasty
- Semiconductor
- Semiramis
- Senegal
- Sensory system
- Seoul
- Separation of powers
- September
- September 11, 2001 attacks
- Serbia
- Sergei Eisenstein
- Series (mathematics)
- Set (mathematics)
- Set theory
- Seven Wonders of the World
- Severe acute respiratory syndrome
- Sex
- Sexism
- Sexual intercourse
- Sexually transmitted disease
- Sexual reproduction
- Seychelles
- Seymour Martin Lipset
- Shahname
- Shaka
- Shanghai
- Shape
- Shark
- Sheep
- Shi'a Islam
- Shinto
- Ship
- Shiva
- Shock (circulatory)
- Short story
- Sierra Leone
- Sigmund Freud
- Sign language
- Sikhism
- Silent film
- Silicate
- Silicon
- Silk Road
- Silver
- Silvio Berlusconi
- Sima Qian
- Simón Bolívar
- Simone de Beauvoir
- Singapore
- Singing
- Sitting Bull
- Skeleton
- Skepticism
- Skin
- Slavery
- Sleep
- Slovakia
- Slovenia
- Small intestine
- Smallpox
- Snake
- Snow
- Socialism
- Social movement
- Social research
- Social sciences
- Social theory
- Society
- Sociology
- Socrates
- Sodium
- Soft drink
- Software
- Sojourner Truth
- Solar power
- Solid
- Solidarity
- Solomon Islands
- Somatosensory system
- Son
- Sonar
- Song
- Sorghum
- Soul
- Soul music
- Sound
- South Africa
- South Australia
- South Carolina
- South Dakota
- Southern Ocean
- South Korea
- South Ossetia
- South Pole
- Soviet Union
- Soviet war in Afghanistan
- Soybean
- Space
- Space exploration
- Space Race
- Space station
- Spanish-American War
- Spanish Civil War
- Spanish conquest of Mexico
- Spanish Empire
- Spanish flu
- Spanish Inquisition
- Spanish language
- Spear
- Special relativity
- Species
- Speed
- Speed of light
- Spice
- Spirituality
- Spiritual practice
- Spoon
- Sport
- Square (geometry)
- Square root
- Sri Lanka
- Srinivasa Ramanujan
- Standard Model
- Statistics
- Statue of Zeus at Olympia
- Steam engine
- Stein Rokkan
- Steven Spielberg
- Stirrup
- Stock exchange
- Stockholm
- Stoicism
- Stone Age
- Stonehenge
- Stove
- Stress (medicine)
- String instrument
- String (computer science)
- Stroke
- Strong interaction
- Strontium
- Structural engineering
- Studio system
- Subatomic particle
- Submarine
- Subtraction
- Sudan
- Suez Canal
- Sufism
- Sugar
- Suicide
- Sulfuric acid
- Sumer
- Sunday
- Sundial
- Sunni Islam
- Super Bowl
- Supply and demand
- Surgery
- Suriname
- Sustainable development
- Svalbard
- Swami Vivekananda
- Swaziland
- Sweden
- Sword
- Sydney
- Sydney Opera House
- Symphony
- Symptomatic treatment
- Syndrome
- Syntax
- Syphilis
- Syria
T
[edit]- Taipei
- Taiping Rebellion
- Tajikistan
- Taj Mahal
- Talmud
- Tamil language
- Tanakh
- Tank
- Tantalum
- Tanzania
- Taoism
- Tasmania
- Tax
- Taxonomy
- Track and field
- TCP
- Tea
- Teacher
- Technology
- Ted Turner
- Telecommunication
- Telegraph
- Telephone
- Telescope
- Television
- Tellurium
- Temperature
- Temple of Artemis
- Tennessee
- Tennis
- Tenzing Norgay
- Terbium
- Tetanus
- Texas
- Thailand
- Thales
- Thallium
- The arts
- Theatre
- The Bahamas
- The Book of One Thousand and One Nights
- The Communist Manifesto
- The Gambia
- The Holocaust
- Theism
- The Lord of the Rings
- Theocracy
- Theory of relativity
- Theravada
- Thermodynamics
- The Scream
- The Thinker
- Thomas Becket
- Thomas Edison
- Thomas Hobbes
- Thomas Jefferson
- Thomas Malthus
- Thomas Mann
- Thomas Paine
- Thomas Samuel Kuhn
- Thorium
- Thought
- Thulium
- Thursday
- Tiananmen Square protests of 1989
- Tim Berners-Lee
- Time
- Time zone
- Timur
- Tin
- Tobacco
- Togo
- Tokelau
- Tokyo
- Tokyo Stock Exchange
- Tomato
- Ton
- Tonga
- Tony Blair
- Tool
- Topology
- Torah
- Toronto
- Tort
- Tourism
- Tower
- Toxin
- Toy
- Trade
- Trade union
- Train
- Transformer
- Transistor
- Transmissible spongiform encephalopathy
- Transnistria
- Transport
- Treaty of Paris (1814)
- Treaty of Versailles
- Tree
- Trench warfare
- 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
- Tycho Brahe
- Typewriter
- Typhoid fever
- Typhus
U
[edit]- Uganda
- Ultraviolet
- Umar
- UNESCO
- Unification of Germany
- Unitarianism
- United Arab Emirates
- United Nations
- United Nations Children's Fund
- 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
V
[edit]- Vaccine
- Vagina
- Vajrayana
- Vanadium
- Vanuatu
- Variable (mathematics)
- Vasco da Gama
- Vatican City
- Vedanta
- Vedas
- Vegetable
- Vehicle
- Velocity
- Venezuela
- Verb
- Victor Hugo
- Victoria, Australia
- Victoria of the United Kingdom
- Video
- Video game
- Vietnam
- Vietnam War
- Vikings
- Viking Age
- Viola
- Violin
- Virgil
- Vishnu
- Visible spectrum
- Visual arts
- Visual spectrum
- Visual system
- Vitruvius
- Vitus Bering
- Vladimir Arnold
- Vladimir Lenin
- Vladimir Putin
- Volcano
- Volleyball
- Volt
- Voltaire
- Volume
W
[edit]- 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
- Wars of the Roses
- Water
- Water polo
- Watt
- W. B. Yeats
- Weak interaction
- Weapon
- Weather
- 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
- World Trade Organization
- World War II
- World Wide Web
- Worship
- Wound
- Wounded Knee Massacre
- Wrestling
- Wright brothers
- Writing
- Wyoming
X
[edit]Y
[edit]- Yale University
- Year
- Yellow
- Yellow fever
- Yemen
- Ytterbium
- Yttrium
- Yuan Dynasty
- Yukon Territory
- Yuri Gagarin