A, Aachen, Aardvark, Aaron, Hank Aaron, Abacá, Abacus, Abadan, Abalone, Abbasid, Cleveland Abbe, Abbey, Abbey Theatre, Robert Sengstacke Abbott, Sir John Joseph Caldwell Abbott, Abdomen, Abdul-Hamid, Kareem Abdul-Jabbar, Abel, Peter Abelard, Aberdeen, Aberdeen Proving Ground, Ralph David Abernathy, optical Aberration, Abidjan, Abilene, Ability test, Abnormal psychology, Abolitionism, Abortion, Aboukir, Abraham, Karl Abraham, Plains of Abraham, Isaac Abravanel (Abrabanel), Absalom, Abscam…
Al-Azhar University, Al Basrah, Alabama, Alabama, Alabaster, Aladdin, Alain-Fournier, Alamo, Alamogordo, Lord Alanbrooke, Pedro Antonio de Alarcón, Alaric, Alaska, Alaska Boundary Dispute, Alaska Highway, Alaska pipeline, Alaskan malamute, Isaac Albéniz, Duke of Alba, Saint Alban, Albania, Albany, Albany Congress, Albany Regency, Albatross, Edward Franklin Albee, Carl Bert Albert, Albert I, Albert II, Prince Albert, Alberta, Leon Battista Alberti, Saint Albertus Magnus, Albigenses, Albino…
Ångström (Å), Anders Jonas Ångström, Elizabeth Garrett Anderson, John Bayard Anderson, Marian Anderson, Maxwell Anderson, Sherwood Anderson, Andes, Andorra, John André, José Bonifácio de Andrada é Silva, Andrea del Sarto, Andrea Doria, Mario Andretti, John Albion Andrew, Saint Andrew, Andrews Air Force Base, Charles McLean Andrews, Roy Chapman Andrews, Leonid Nikolayevich Andreyev, Ivo Andric, Androcles, Androgen, Andromache, Andromeda, Andromeda, Yuri Vladimirovich Andropov, Sir Edmund Andros, Anemia, Anemometer, Anemone, Anesthesia…
Århus, Arcturus, Ardennes, Arecjuipa, Hannah Arendt, Areopagus, Ares, Argentina, Argon, Argonaut, Argonauts, Argonne National Laboratory, Argus, Ariadne, Arianism, Oscar Arias Sánchez, Ludovico Ariosto, Aristarchus of Samos, Aristides, Aristocracy, Aristophanes, Aristotle, Arithmetic, Sawako Ariyoshi, Arizona, Ark, Ark of the Covenant, Arkansas, Arkansas River, Sir Richard Arkwright, Arlington National Cemetery, Armada, Armadillo, Armageddon, Armagnac, Armenia, Armor, Armory Show, Arms control, Anne Legendre Armstrong, Edwin Howard Armstrong…
Augusta, Augusta, Augustan Age, Saint Augustine, Saint Augustine, Augustus, Auk, Marcus Aurelius, Aurora, Auschwitz, Jane Austen, Austerlitz, Austin, Stephen Fuller Austin, Austral Islands, Australia, Australian Aborigines, Australian Desert, Australopithecus, Austria, Austria-Hungary, Authoritarianism, Autism, Autocracy, or autogyro Autogiro, Automatic frequency control, Automatic pilot, Automation, Automobile, American Automobile Association, Automobile racing, United Automobile Workers, Autonomic nervous system, Autopsy, Auxin, Avant-garde, Average, Averroës…
B.C., Maurice Béjart, Bar mitzvah, Barley, Barn owl, Barn swallow, Barnacle, Barnacle goose, Christiaan Neethling Barnard, Edward Emerson Barnard, Frederick Augustus Porter Barnard, Henry Barnard, Barnburners, Djuna Barnes, Clarence Lewis Barnhart, P(hineas) T(aylor) Barnum, Barometer, Baron, Baroque, Barquisimeto, Alfred Hamilton Barr Jr., Barracuda, Paul François Jean Nicolas Barras Vicomte de, Jean-Louis Barrault, Elizabeth Barrett, Sir James Matthew Barrie, Barrier reef, Justo Rufino Barrios, James Barron…
Bell's palsy, Belmopan, Belo Horizonte, Belorussia, Belsen, Beluga, Ludwig Bemelmans, Samuel Flagg Bemis, Ahmed Ben Bella, David Ben-Gurion, Ben-Hur, Steven Vincent Benét, Itzhak Ben-Zvi, Benares, Jacinto Benavente y Martínez, Robert Charles Benchley, Vincent Bendix, Bends, Saint Benedict of Nursia, Ruth Fulton Benedict, Benedict XV, Benedictine Orders, Benelux, Eduard Benes, Bengal, Bay of Bengal, Benghazi, Benin, Judah Philip Benjamin, Arnold Bennett, Floyd Bennett, James Gordon Bennett…
Heinrich Böll, B'nai B'rith, Gebhard Leberecht von Blücher, Louis Blériot, Black haw, Black Hawk, Black Hills, Black hole, Black Hole of Calcutta, Black Kettle, Black lung, Black market, Black Mountains, Black Muslims, Black Panther Party, Black Power, Black Prince, Black Sea, Black September, Black Shirts, Black Sox Scandal, Black studies, Black widow, Blackhead, Blacklist, Harry Andrew Blackmun, Blacksnake, Sir William Blackstone, Antoinette Brown Blackwell, Elizabeth Blackwell, Bladder…
Georg Büchner, Mutiny on the Bounty, Bourbon, Bourgeoisie, Habib Ben Ali Bourguiba, Margaret Bourke-White, Nathaniel Bowditch, James Bowdoin, Sir Mackenzie Bowell, Elizabeth Bowen, Bowerbird, Bowfin, James Bowie, Paul Bowles, Samuel Bowles, Bowling, Boxelder, Boxer, Boxer Rebellion, Boxing, Boxwood, Boy Scouts, Belle Boyd, Robert Boyle, Battle of the Boyne, Boys Town, Boysenberry, Bozeman Trail, Charles Loring Brace, Braces, Ray Bradbury, Edward Braddock, Bradford, Bradford, William Bradford…
Luis Buñuel, Buffalo grass, Georges Louis Leclerc Buffon Comte de, Bug, Buganda, Bugbane, Bugging, Bugle, David Dunbar Buick, Building, Bulb, Bulbul, Charles Bulfinch, Nikolai Alexandrovich Bulganin, Bulgaria, Battle of the Bulge, Bulimia, John Bull, Bull Moose Party, Battles of Bull Run, Bull terrier, Bulldog, Bullfighting, Bullfinch, Bullfrog, Bullhead, Bullmastiff, Bulrush, Edward George Earle Lytton Bulwer-Lytton t Baron Lytton (1s), Sir Henry Bulwer, Bumblebee, Bunchberry, Ralph Johnson Bunche…
Lázaro Cárdenas, Cannon, Cannon-ball tree, Juan Sebastian del Cano, Canoe, Canon, Canonization, Canopus, Antonio Canova, Cantaloupe, Cantata, Canterbury, Canterbury bell, Canterbury Tales, Canticle, Canticles, Canton, China Canton, Canute, Canvasback, Canyonlands National Park, Canzoniere, Cap-Haitien, Capacitance, Capacitor, Cape Breton Island, Cape Canaveral, Cape Cod, Cape Cod Canal, Cape of Good Hope, Cape Hatteras, Cape Horn, Cape Kennedy, Cape May, Cape Province, Cape Town…
Louis-Ferdinand Céline, Paul Cézanne, Cat's eye, Catherine of Aragon, Catherine of Braganza, Catherine de' Medici, Catherine the Great, Saint Catherine of Siena, Cathode ray, Roman Catholic Church, Catholic Emancipation Act, Catiline, Catkin, George Catlin, Catnip, Cato, Catskill Mountains, Carrie Lane Chapman Catt, Cattail, Cattle, Cattle tick, Bruce Catton, Gaius Valerius Catullus, Caucasia, Caucasus, Caucus, Cauliflower, Caustic, Cavalry, Lauro Fred Cavazos, Cave, Cavefish, Edith Louise Cavell…
Child welfare, Children's literature, Chile, Chillicothe, Chimborazo, Chimera, Chimpanzee, Chimu, China, China Sea, Chinch bug, Chinchilla, Chinese, Chinese cabbage, Chinese Exclusion Acts, Chinese-Japanese Wars, Chinese literature, Chinook, Chinook, Chipmunk, Thomas Chippendale, Chippewa, Jacques Chirac, Giorgio de Chirico, Chiron, Chiropractic, Shirley Chisholm, Chisholm Trail, Chiton, Chivalry, Chive, Chlamydia, Chloride, Chlorine, Chloroform, Chlorophyll, Chocolate, Choctaw, Cholera, Cholesterol, Noam Chomsky…
Clyde, George Clymer, Clytemnestra, Cnut, Coagulant, Coahuila, Coal, Coal oil, Coal tar, Coalition, Henri Marie Coanda, United States Coast Guard Academy, U.S. Coast Guard, Coast Ranges, Coati, Elizabeth Coatsworth, Coaxial cable, Cobalt, Ty(rus Raymond) Cobb, William Cobbett, Richard Cobden, Cobra, Coca, Cocaine, Cochise, Jacqueline Cochran, Cock-of-the-rock, Cockatiel, Cockatoo, Sir John Douglas Cockcroft, Cocker spaniel, Cockle, Cocklebur, Cockroach…
Córdoba, Córdoba, Côte d'Azur, Constance Missal, Constanta, Constantine, Constantine, The Great Constantine I, Constantinople, Constellation, Constellation, Constipation, Constitution, Constitution of the United States, USS Constitution, U.S. Constitutional law, Constitutional Union Party, Constructivism, Consul, United States Office of Consumer Affairs, Consumer Federation of America, Consumer Price Index, Consumer Product Safety Commission, Consumer protection, Consumer protection laws, Consumers Union, Consumption, Contact lens, Containerization, Contempt of court, Continent, Continental Association…
Michel-Guillaume Jean de Crèvecoeur, Cretinism, Creutzfeldt-Jakob disease, Crewel, Crib death, Cribbage, Francis Harry Compton Crick, Cricket, Cricket, Crime, Crime laboratory, Crimea, Crimean War, Criminal law, Criminology, Critical mass, Criticism, Crittenden Compromise, Cro-Magnon, Croaker, Croatia, Benedetto Croce, Crochet, Davy Crockett, Crocodile, Crocodile bird, Crocus, Croesus, Samuel Crompton, Oliver Cromwell, Richard Cromwell, Thomas Cromwell Earl of Essex, A.J. Cronin, Walter Leland Cronkite Jr.…
D-Day, Détente, Davis Cup, Henry Gassaway Davis, Jefferson Davis, John Davis, John William Davis, Miles Dewey Davis, Paulina Wright Davis, Richard Harding Davis, Samuel Davis, Davis Strait, Stuart Davis, Sir Humphry Davy, Dawes Act, Charles Gates Dawes, Dawes Plan, Day, Day of Atonement, Clarence Day, Dorothy Day, Cecil Day-Lewis, Day lily, Dayaks, Moshe Dayan, Dayfly, Daylight saving time, Dayton, Jonathan Dayton, Daytona Beach, DC, DDT, Marguerite Lofft De Angeli…
Porfirio Díaz, (Paul Marie Théodore) Vincent D'lndy, Richard D'Oyly Carte, Diana, Princess of Wales Diana Spencer, Diaphragm, Diarrhea, Diary, Bartholemeu Dias or Diaz, Diaspora, Diathermy, Diatom, Dice, Philip Kendrid Dick, Dickcissel, Charles Dickens, James Lafayette Dickey, Anna Elizabeth Dickinson, Emily Dickinson, John Dickinson, Dictatorship, Dictionary, Denis Diderot, Joan Didion, Babe Didrikson, John George Diefenbaker, Diego Garcia, Ngo Dinh Diem, Diemaking, Dien Bien Phu, Dies and diemaking…
École des Beaux-Arts, Albrecht Dürer, Friedrich Dürrenmatt, Düsseldorf, Dream, Dred Scott case, Dredging, Theodore Dreiser, Dresden, Dresden china, Charles Richard Drew, Dreyfus Affair, Alfred Dreyfus, Drill, Drill, Drive-in, Drought, Drowning, Drug, Drug abuse, Drug addiction, Drug Enforcement Administration, Druids, Drum, Drum, Drumlin, Druses, Dry cleaning, Dry farming, Dry ice, Dry rot, Dry Tortugas, John Dryden, DT's, Marie Jeanne Bécu Du Barry Countess…
Éire, Ε pluribus unum, Eilat, Albert Einstein, Einstein theory, Einsteinium, Willem Einthoven, Dwight David Eisenhower, Alfred Eisenstaedt, Sergei Mikhailovich Eisenstein, EKG, El Aaiun, El Alamein, El Dorado, El Greco, El Misti, El Niño, El Paso, El Salvador, Eland, Elat, Elba, Elbe River, Elder, Elderberry, Eleanor of Aquitaine, Elecampane, Election, Election campaign, Electoral college, Electoral Commission, Electra, Electra complex, Electric arc, Electric battery, Electric car, Electric circuit…
E=mc2, Erasistratus, Desiderius Erasmus, Thomas Erastus, Eratosthenes, Erbium, Ergot, Ludwig Erhard, Eric the Red, Erie, Erie Canal, Erik Homburger Erikson, Erin, Eritrea, Ermine, Max Ernst, Eros, Erosion, Samuel James Ervin Jr., Julius Erving, Erysipelas, Erythema, Erythromycin, Esau, Escalator, Escape velocity, Escobedo v. Illinois, Escorial, Esdraelon, Esfahan, Levi Eshkol, Eskimo, Eskimo dog, Esophagus, ESP, Esperanto, Espionage, Phil Esposito, Essay, Essen…
François de Salignac de la Mothe Fénelon, Fès, Federal Land Bank, Federal Maritime Commission, Federal Mediation and Conciliation Service, Federal National Mortgage Association, Federal Reserve Bank, Federal Reserve System, Federal system, Federal Trade Commission, The Federalist, Federalist Party, Lyonel Feininger, Feisal, Robert Feke, Feldspar, Bob Feller, Federico Fellini, Felony, Feminism, Fencing, Fenian movement, Fennec, Fennel, Fer-de-lance, Edna Ferber, Ferdinand, Ferdinand, Archduke Ferdinand, Lawrence Ferlinghetti, Pierre de Fermat…
Forest, Forest fire, Forest products, U.S. Forest Service, Forestry, Forgery, Forget-me-not, Forging, Formaldehyde, Formalin, Formic acid, Formosa, Edwin Forrest, Nathan Bedford Forrest, James Vincent Forrestal, E(ward) M(organ) Forster, Forsythia, Fort Benning, Fort Bragg, Fort Dix, Fort Duquesne, Fort Eustis, Fort George G. Meade, Fort Knox, Fort Lauderdale, Fort Leavenworth, Fort Leonard Wood, Fort McClellan, Fort McHenry, Fort McPherson…
Gê, (Jean Louis André) Théodore Géricault, Dennis Gabor, Gaborone, Gabriel, Muammar Muhammad al- Gadhafi, Gadolinium, Gadsden, Gadsden Purchase, Gadwall, Gaea, Gaelic, Gaelic literature, Gaels, Gag rules, Yuri Alekseyevich Gagarin, Thomas Gage, Gaillardia, Thomas Gainsborough, Galago, Sir Galahad, Galapagos Islands, Galatia, Epistle to the Galatians, Galaxy, John Kenneth Galbraith, Galen, Galicia, Galilee, Sea of Galilee, Galileo Galilei, Gall, Gall, Gall bladder, (Abraham Alfonse) Albert Gallatin…
G.I. Bill of Rights, Luis de Góngora y Argote, Göteborg, Ghibellines, Lorenzo Ghiberti, Ghirlandajo, Ghost dance, Alberto Giacometti, Giant, Giant panda, Giant schnauzer, Giant sequoia, Gibberellin, Gibbon, Edward Gibbon, Gibbons v. Ogden, Josiah Willard Gibbs, Gibraltar, Strait of Gibraltar, Kahlil Gibran, Althea Gibson, Charles Dana Gibson, André Gide, Gideon, Gideon v. Wainwright, Sir (Arthur) John Gielgud, Edward Gierek, Gila monster, Gila River, Sir Humphrey Gilbert…
Matthias Grünewald, Grand Rapids, Grand Teton National Park, Grand unified theories, National Grange, Red Grange, Granger cases, Granite, Cary Grant, (Hiram) Ulysses Simpson Grant, Grape, Grapefruit, Graph, Graphic arts, Graphite, Graphology, Grass, Günter Wilhelm Grass, François Joseph Paul Grasse Comte de, Grasshopper, Grassland, Ella Tambussi Grasso, Grave Creek Mound, Morris Cole Graves, Robert Ranke Graves, Gravitation, Center of Gravity, Asa Gray, Elisha Gray, Gray fox, Gray Panthers, Robert Gray…
H-bomb, Ernst von Haeckel, Hafiz, Hafnium, Hagar, Hagfish, Book of Haggai, Sir Henry Rider Haggard, Hagia Sophia, The Hague, Frank Hague, Hague Peace Conferences, Hague Tribunal, Otto Hahn, (Christian Friedrich) Samuel Hahnemann, Haida, Haifa, Alexander Meigs Haig Jr., Douglas Haig t Earl (1s), Haiku, Hail, Haile Selassie, Haiphong, Hair, Hair snake, Hairdressing, Hairworm, Fred Wallace Haise Jr., Republic of Haiti, Hajj, Hake, Richard Hakluyt, George Stanley Halas…
Jacques René Hébert, Héloïse, James Augustine Healy, Hearing, Hearing aid, Hearing loss, Lafcadio Hearn, Samuel Hearne, Phoebe Apperson Hearst, William Randolph Hearst, Heart, American Heart Association, Heart murmur, Heat, Heat capacity, Heat pipe, Heat pump, Heat rash, Heath, Edward Richard George Heath, Heath hen, Heating, Heatstroke, Heaven, Heaves, Heavy hydrogen, Heavy water, Hebe, Hebrew, Epistle to the Hebrews, Hebrides, Hebron, Hecate, Ben Hecht, Isaac Thomas Hecker, Margaret Mary Heckler…
Battle of Höchstädt, Johann Christian Friedrich Hölderlin, Ho Chi Minh, Ho Chi Minh City, Meindert Hobbema, Thomas Hobbes, Oveta Culp Hobby, Laura Zametkin Hobson, Rolf Hochhuth, Hockey, David Hockney, Alan Lloyd Hodgkin, Dorothy Mary Crowfoot Hodgkin, Hodgkin's disease, James Riddle Hoffa, Eric Hoffer, Dustin Hoffman, E(rnst) T(heodor) A(madeus) Hoffmann, Josef Hofman, Hans Hofmann, Hugo von Hofmannsthal, Hog, Ben Hogan, William Hogarth, Helen Sawyer Hogg, Hognose…
Hu Yaobang, River Humber, Humboldt Current, Friedrich Heinrich Alexander Humboldt Baron von, David Hume, Humidity, Hummingbird, Hummingbird moth, Humor, Engelbert Humperdinck, Doris Humphrey, Hubert Horatio Humphrey, Humus, Hun, Hunchback, Hundred Days, Hundred Years War, Hungarian, Hungarian pointer, Hungary, Hunger, H(aroldson) L(afayette) Hunt, (James Henry) Leigh Hunt, Richard Morris Hunt, William Holman Hunt, Hunting, Huntington, Collis Potter Huntington, Henry Edwards Huntington, Huntington's disease, Samuel Huntington…
Indium, Inert gas, Inertia, Inertial guidance, Infant, Infantry, Infection, Infertility, Infinity, Inflation, Inflection, Inflorescence, Influenza, U.S. Information Agency, Information theory, Infrared rays, William Inge, Jean Auguste Dominique Ingres, Inheritance tax, referendum Inititive and recall, Injunction, Ink, George Inness, Innocence, Innocent, Innsbruck, Inoculation, Daniel Ken Inouye, Input-output analysis, Inquest, Inquisition, Insect, Insecticide, Insectivore, Insectivorous plant, Installment plan, Instinct, Insulation, Insulin…
J particle, Jívaro, Jasmine, Jason, Jasper, Jasper National Park, Karl Jaspers, Jaundice, Java, Java man, Javelin, Javelina, Jay, John Jay, Jay Treaty, Jazz, Jazz Age, Saint Jean Baptiste de la Salle, Jeanne d'Arc, Charles Édouard Jeanneret-Gris, Jeddah, Jeep, Robinson Jeffers, Jefferson City, Joseph Jefferson, Jefferson Memorial, State of Jefferson, Jefferson Territory, Thomas Jefferson, Jeffersonian democracy, Jeffersonville, James Jackson Jeffries, Jehoiakim, Jehoshaphat, Jehovah, Jehovah's Witnesses…
János Kádár, K2, Kaaba, Dmitri Kabalevsky, Kabbalah, Kabuki, Kabul, Muammar Muhammad al- Kaddafi, Kaesong, Kafir, Franz Kafka, Louis Isadore Kahn, Henry John Kaiser, Kala-azar, Kalahari Desert, Kale, Kaleidoscope, Kaliningrad, Kalmar Union, Kalmia, Kamchatka Peninsula, Kamehameha I, Lev Borisovich Kamenev, Kamikaze, Kampala, Kampuchea, MacKinlay Kan tor, Kanawha River, Wassily Kandinsky, Kanem, Kangaroo, Kangaroo apple, Kangaroo court, Kangaroo rat, Kanishka, Kanpur, Kansa, Kansas…
Wolfgang Köhler, Köln, Kitty Hawk, Kiwanis International, Kiwi, Kiwi fruit, Klaipeda, Klamath, Paul Klee, Lawrence Robert Klein, Heinrich von Kleist, Otto Klemperer, Gustav Klimt, Franz Kline, Klondike, Knee, Knife, Eric Knight, Orders of Knighthood, Knights of the Bath, Knights of Columbus, Knights Grand Cross of the Bath, Knights Hospitallers, Knights and knighthood, Knights of Labor, Knights of Pythias, Knights of the Round Table, Knights of Saint John, Knights Templars, Knitting, Knitting machine…
Pierre Charles L'Enfant, Fernand Léger, Léopoldville, Claude Lévi-Strauss, La Paz, François La Rochefoucauld Duc de François Duc de, La Rochelle, Jean La Salle, Robert Cavelier La Salle Sieur de, Dorothea Lange, William Langland, Irving Langmuir, Stephen Langton, Lillie Langtry, Language, Sidney Lanier, Lansing, Robert Lansing, Lanthanide, Lanthanum, Lanzhou, Lao Tzu, Laocoön, Laos, Lapland, Lapps, Lapwing, Laramie, Larceny, Larch, Ring Lardner, Laredo, Lares and penates, Lark…
Lübeck, Lódz, Friedrich Löffler, Antonio López de Santa Anna, José López Portillo, Li Peng, Li Po, Li Yuan, Lydia Kamekeha Liliuokalani, Lille, Beatrice Lillie, Lilongwe, Lily, Lily of the valley, Lima, Lima bean, Pol de Limbourg, Lime, Lime, Lime tree, Limerick, Limestone, José Limon, Limonite, Limpet, Limpopo River, Lin Piao, Lincoln, Abraham Lincoln, Lincoln Center for the Performing Arts, Mary Todd Lincoln, Lincoln Memorial, Robert Todd Lincoln, Jenny Lind…
Mary Lyon, Lyre, Lyrebird, Lysander, Lysergic acid diethylamide, Lysias, Lysippus, Lysippus, M, Lorin Maazel, Macadam, Macadamia nut, Macao, Macaque, Douglas MacArthur, Macau, Thomas Babington Macaulay, Macaw, Macbeth, Judah Maccabee, Books of Maccabees, Hugh MacDiarmid, J.E.H. MacDonald, James Ramsay MacDonald, John Sandfield Macdonald, Sir John Alexander Macdonald, Thomas Macdonough, Edward Alexander MacDowell, Macedonia, Robert MacGregor, Ernst Mach, Mach number, Guillaume de Machaut, Niccolò Machiavelli…
Sir Robert John Le Mesurier M'Clure, Ma Yuan, Manuelito, Manuscript, Manzanita, Alessandro Manzoni, Mao Tse-tung, Mao Zedong, Maori, Map, Maple, Maputo, Marabou, Maracaibo, Marajó, Jean Paul Marat, Marathon, Marble, Marble bones, Marbury v. Madison, Franz Marc, Marcel Marceau, Gabriel Marcel, Peyton Conway March, Rocky Marciano, Marcion, Marco Polo, Guglielmo Marconi, Ferdinand Edralin Marcos, Marcus Aurelius, Herbert Marcuse, Mardi Gras, Marduk, Maria Theresa, Mariana Islands…
Mílos, Mérida, Prosper Mérimée, Medicare, Medici, Medicine, patent Medicine, Medieval period, Joseph Medill, Medina, Harold Raymond Medina, Mediterranean fruit fly, Mediterranean Sea, Medusa, Medusa, Ezra Meeker, Meerkat, Zubin Mehta, Arthur Meighen, Meiji, Mein Kampf, Golda Meir, Lise Meitner, Mekong River, Melaka, Philipp Melanchthon, Melanesia, Melanin, Melbourne, Andrew William Mellon, Andrew W. Mellon Foundation, Melodrama, Melon, Melos, Meltdown, Herman Melville, Melville Island, Memel, Hans Memling…
August Ferdinand Möbius, Eduard Mörike, Rudolf Ludwig Mössbauer, Mississippi, Mississippi River, Mississippian, Missoula, Missouri, Missouri Compromise, Missouri River, Mistletoe, Frédéric Mistral, Gabriela Mistral, Mitanni, Billy Mitchell, John Newton Mitchell, Margaret Mitchell, Maria Mitchell, Wesley Clair Mitchell, Mite, Mithra, Mithridates VI, François Maurice Mitterrand, Tom Mix, Moabite stone, Mobile, Mobutu Sese Seko, Moccasin flower, Moccasin snake, Mock orange, Mockingbird, Model Parliament, Amedeo Modigliani, Modoc, Moffat Tunnel, Mogadishu…
Karl Alexander Müller, Paul Hermann Müller, Mudpuppy, Robert Gabriel Mugabe, Mughal Empire, Mugwump, Muhammad, Muhammad Ali, Elijah Muhammad, Muhammad II, Muhammad Reza Pahlavi, Muhammadan art, John Muir, Mukden, Mulberry, Mule, Mule deer, Mullein, Hermann Joseph Muller, Mullet, Robert Sanderson Mulliken, Brian Mulroney, Multiple sclerosis, Lewis Mumford, Mummy, Mumps, Edvard Munch, Munich, Munich Agreement, Municipal government, Hector Hugh Munro, Munsee, Muppets, Shikibu Murasaki, Joachim Murat, Iris Murdoch…
U Ne Win, Nebular hypothesis, Jacques Necker, Necrosis, Nectar, Nectar, Nectarine, Needle, Needlepoint, Nefertiti, Negev, Negligence, Negotiable instrument, Negroes, Nehemiah, Jawaharlal Nehru, Horatio Nelson, Nelson River, Thomas Nelson Jr., Neman River, Nematoda, Nematomorpha, Nemean Games, Howard Nemerov, Nemertinea, Nemesis, Nene, Neo-Malthusianism, Neodymium, Neolithic Period, Neon, Neoplatonism, Nepal, Nephrite, Nephritis, Neptune, Neptune, Neptunium, Nereus, Saint Phillip Neri, Walther Hermann Nernst…
North America, North American Aerospace Defense Command, North Atlantic Treaty Organization, North Carolina, North Cascades National Park, North Dakota, North Island, North Korea, Lord North, North magnetic pole, Oliver Laurence North, North Pacific Current, North Platte, North Pole, North Sea, North Star, North Vietnam, North West Company, North Yemen, Viscount Northcliffe, Northeast Passage, Northern harrier, Northern Ireland, Northern lights, Northern Mariana Islands, Northern pike, Northern Rhodesia, Northern Territory, Northfield, Northmen, John Howard Northrop…
Juan de Oñate, Eugene Gladstone O'Neill, Thomas Philip (“Tip”) O'Neill Jr., Leonora O'Reilly, Olympic Mountains, Olympic National Park, Omaha, Omaha, Oman, Omar Khayyam, Ombudsman, Omdurman, Ommatidium, Omnibus bill, Omsk, Onager, Aristotle Socrates Onassis, Oncology, Oneida, Oneida Community, Onion, Onondaga, Ontario, Onyx, Oostende, Ooze, Opal, Alexander Ivanovich Oparin, OPEC, Open-Door Policy, Open housing, Open shop, Opera, Operetta, Ophthalmia…
P′eng-hu, Palestine, Palestine Liberation Organization, Giovanni Pierluigi da Palestrina, Andrea Palladio, Palladium, Pallas, Palm, Palm oil, Palm Springs, Palm Sunday, Arnold Palmer, A(lexander) Mitchell Palmer, Nathaniel Brown Palmer, Viscount Palmerston, Palmetto, Palmistry, Palmyra, Palmyra palm, Palo Alto, Palomar Observatory, Paloverde, Palpitation, Thorsteinn Palsson, Palsy, Pamirs, Pampa, Pan, Pan-American conferences, Pan American Games, Pan American Highway, Pan American Union, Panama, Panama Canal…
Javier Pérez de Cuéllar, Henri Phillippe Pétain, Pennsylvania Dutch, Pennyroyal, Penobscot River, Penology, Pensacola, Pension, Penstemon, The Pentagon, Pentagon Papers, Pentateuch, Pentathlon, Pentecost, Pentecostalism, Pentothal, Arno Allan Penzias, Peonage, Peony, Peoria, Pepin the Short, Pepper, Pepper, Sir William Pepperell, Peppermint, Peppertree, Pepsin, Peptide, Samuel Pepys, Pequot, Eva Duarte de Perón, Juan Domingo Perón, Percentage, Perception, Perch, Percussion instrument, Peregrine falcon, S.J. Perelman…
Piñon, Pimento, Pimpernel, Pinching bug, Gifford Pinchot, Pinckney, Pinckney Treaty, Pindar, Pine, Pine siskin, Pineal gland, Pineapple, Sir Arthur Wing Pinero, Pink, Pink bollworm, Pink-eye, Allan Pinkerton, Augusto Pinochet Ugarte, Pinochle, Pinta, Pintail, Harold Pinter, Pinworm, Pinzón, Pion, Pioneer life in America, Pipal, Pipe, Pipe, Pipe, Pipefish, Pipeline, Pipit, Piraeus, Luigi Pirandello, Giovanni Battista Piranesi, Piranha, Pirate, Pisa, Council of Pisa…
Pôrto Alegre, Po River, Poerty, Popé, Pope, Alexander Pope, Poplar, Popocatépetl, Sir Karl Raimund Popper, Poppy, Popular music, Population, Populism, Jean Baptiste Poquelin, Porcelain, Porcupine, Porcupinefish, Pore, Porgy, Porifera, Pork, Pork barrel, Pornography, Porphyry, Porpoise, Ferdinand Porsche, Port, Port-au-Prince, Port Authority of New York and New Jersey, Port Elizabeth, Port Louis, Port Moresby, Port Said, Port-of-Spain, Port Sudan, Portage la Prairie…
Providence, Province, Provincetown, Provo, Pierre Paul Prud'hon, Prune, Pruning, Prussia, Prussian blue, Prussic acid, Przewalski's horse, Book of Psalms, Psi particle, Psittacosis, Psoriasis, Psychedelics, Psychiatry, Psychical research, Psychoanalysis, Psychological warfare, Psychology, Psychosis, Psychosomatic medicine, Psychotherapy, Psyllium, PT boat, Ptarmigan, Pteranodon, Pteridophyte, Pterosaur, Ptolemy, Ptolemy, Ptomaine poisoning, Pu Yi, Puberty, Public domain, Public health, Public lands, Public opinion, Public opinion poll…
Francis Rákóczy II, Raft, Rafting, Ragtime, Ragweed, Rail, Railroad, electric Railroad, model Railroad, Railway brotherhoods, Railway Labor Act, Rain, Rain dance, Rain forest, Rain gauge, Rain tree, Rainbow, Rainbow Bridge National Monument, Rainier III, Rainmaking, Rainy Lake, Raisin, Raja, Rajputs, Rake, Raleigh, or Ralegh Raleigh Sir Walter, Ram, Ramakrishna Paramahansa, Sir Chandrasekhara Venkata Raman, Ramapithecus, Ramayana, Jean Philippe Rameau, Rameses II, Ramie, Ramp, Jean-Pierre Rampal…
Ole Edvart Rölvaag, Río de la Plata, Respiratory system, Restaurant, Restigouche River, Restoration, Resurrection, Resurrection plant, Resuscitator, Retailing, Retainer, Retardation, Retina, Retriever, Reunion, Baron de Reuter, Reuters, Walter Philip Reuther, Book of Revelation, Hiram Rhodes Revels, internal Revenue, Revenue sharing, Revere, Paul Revere, Reversing Falls of Saint John, Revivalism, Revolution, Revolution of (1848), Revolutionary War in America, Revolver, Kenneth Rexroth, Reye's syndrome, Reykjavik, Reynard the Fox…
R/x, R/x, Roman Forum, Roman gods, Roman numerals, Roman Republic, Roman walls, Romanesque art and architecture, Romania, Romanov, Grigoriy Vasilyevich Romanov, Epistle to the Romans, Romanticism, Sigmund Romberg, Rome, Rome, Ancient Rome, Erwin Rommel, George Romney, Carlos Pena Romulo, Romulus Augustulus, Romulus and Remus, Rondo, Pierre de Ronsard, Linda Ronstadt, Roof, Rook, Roosevelt Campobello International Park, Eleanor Roosevelt, Franklin Delano Roosevelt, Nicholas J. Roosevelt, Theodore Roosevelt…
Sámos, George Isidore Sánchez, São Paulo, São Tomé and Príncipe, Saône River, Marquis de Sade, Sadi, Moshe Safdie, Safety, Safety lamp, Safety valve, Safflower, Saffron, Saga, Carl Edward Sagan, Françoise Sagan, Sage, Russell Sage, Sagebrush, Sagebrush State, Saginaw, Sago, Saguaro, Sahara Desert, Sahel, Saigon, Sailfish, Sailing, Saint, Saint Andrews, Saint Augustine, Massacre of Saint Bartholomew's Day, Saint Bernard, Saint Bernard Passes, Saint Christopher and Nevis…
Eisaku Sato, Saturation, Saturn, Saturn, Saturnalia, Satyr, flying Saucer, Saudi Arabia, Sauk, Saul, Sault Sainte Marie, Saurischian, Jeanne Mathilde Sauvé, Savanna, Savannah, Savannah, Savannah River, Savings bank, Savings bond, Savings and loan association, Girolamo Savonarola, Savoy, Saw, Saw Maung, Sawfish, Sawfly, Saxifrage, Saxons, Saxony, Saxophone, Dorothy Sayers, Scabies, Scalawag, Scale insect, weighing Scale, Antonin Scalia, Scallop, Scandinavia, Scandinavian literature, Scandium, Scapegoat…
Treaty of Sèvres, Serum, Serval, Michael Servetus, Service industries, Serviceberry, Servomechanism, Sesame, Sesshu, Roger Sessions, William Steele Sessions, Set theory, or Set Seth, Seti I, Saint Elizabeth Ann Seton, Setter, Settlement house, Georges Seurat, Dr. Seuss, Sevastopol, Seven Cities of Cibola, Seven seas, Seven Weeks' War, Seven Wonders of the Ancient World, Seven Years' War, Seventh-day Adventists, River Severn, John Sevier, Seville, Sewage, Samuel Sewall, William Henry Seward…
Sing Sing, Singing Tower, Single tax, Sinhalese, Sinn Féin, Sintering, Sinus, Sioux, Sioux City, Sioux Falls, Siphon, Paul Allman Siple, Siren, Sirenian, Sirens, Sirius, Sirocco, Sisal, Alfred Sisley, Sistine Chapel, Sisyphus, Sitar, Sitka, Sitting Bull, Dame Edith Sitwell, les Six, Sixtus, Skagerrak, Skate, Skateboard, Skeena River, Skeet, Skeleton, Skepticism, Skew line, Louis Skidmore, Skiing, Skimmer, Skin, Skin diving, Skin grafting, Skink…
Sour gum, Sourwood, John Philip Sousa, David Hackett Souter, South Africa, South America, Federation of South Arabia, South Australia, South Bend, South Carolina, South Dakota, South Island, South Korea, South Pole, South Vietnam, South West Africa, South Yemen, Southampton, Southeast Asia, Southeast Asia Treaty Organization (SEATO), Southern Baptist Convention, Southern Christian Leadership Conference (SCLC), Southern Cross, Sovereignty, Soviet, Soviet Union, Sow bug, Soybean, Soyer brothers, Wole Soyinka, Paul Henri Spaak…
Sterility, Sterilization, Isaac Stern, Joseph von Sternberg, Laurence Sterne, Steroid, Stethoscope, Stettin, Edward Riley Stettinius Jr., Friedrich Wilhelm Augustin Steuben Baron von, Stevens, John Paul Stevens, Thaddeus Stevens, Wallace Stevens, Stevenson, Robert Louis Stevenson, Julian Haynes Steward, James Stewart, Potter Stewart, Stibnite, Stickleback, Stickseed, Alfred Stieglitz, Clyfford Still, Stillwater, Stilt, Joseph Warren Stilwell, Henry Lewis Stimson, Stimulant, Stingray, Stink bug, Stirling engine, Stoat, Stock, capital Stock, Stock exchange…
Sweet alyssum, Sweet flag, Sweet gum, Sweet pea, Sweet potato, Sweet William, Sweetbrier, Swift, Swift, Gustavus Franklin Swift, Jonathan Swift, John Leonard Swigert Jr., Swimming and diving, Algernon Charles Swinburne, Swing, Swiss chard, Swiss Family Robinson, Swiss Guard, Switzerland, Sword, Swordfish, Sycamore, Thomas Sydenham, Sydney, Syllogism, Saint Sylvester I, Sylvester II, Symbiosis, Symbolism, Symphonic poem, Symphony, Synagogue, Synchro-cyclotron, Synchrotron, Syndicalism, John Millington Synge, Synoptic Gospels…
Texas Rangers, Textile, William Makepeace Thackeray, Thailand, Thalassemia, Thales, Thalidomide, Thallium, Thames River, Thanksgiving Day, U Thant, Thar Desert, Twyla Tharp, Margaret Hilda Thatcher, Sylvanus Thayer, Theater, Theater of the Absurd, Thebes, Thebes, Theism, Themistocles, Theocracy, Theocritus, Theodoric, Theodosius I, Theology, Axel HugoTeodor Theorell, Theorem, Theosophy, Domenikos Theotokopoulos, Therapy, Saint Theresa, Thermal pollution, Thermal springs, Thermocouple, Thermodynamics, Thermography, Thermometer, Thermopylae, Thermosphere, Thermostat…
Trans-Siberian Railroad, Transcendentalism, Transcontinental treaty, Transducer, Transformer, blood Transfusion, Transistor, Transkei, Transmigration of the soul, Transmission, Transmutation of elements, Transpiration, Transplant, Department of Transportation, Transsexualism, Transuranium elements, Transvaal, Transylvania, Trappists, Travertine, Treason, Department of the Treasury, Treaty, Treaty of 1, Tree, Tree frog, Tree shrew, Tree toad, Trench mouth, Trent Affair, Council of Trent, Trenton, Battle of Trenton, Trephining, George Macauley Trevelyan, Triage, Trial…
U.S., U Thant, UN Peacekeeping Forces, Unit rule, United Empire Loyalists, United Farm Workers of America, United Food and Commercial Workers International Union, United Kingdom, United Methodist Church, United Mineworkers of America, United Nations, United Nations Children's Fund, Scientific United Nations Educational and Cultural Organization, United Nations University, United Negro College Fund, United Parcel Service, United Press International, United Service Organizations, United Society of Believers, United States Air Force, United States Air Force Academy, United States of America…
V/STOL, Viña del Mar, Victoria, Victoria, Victoria, Victoria, Victoria Falls, Vicuña, Video camera, Video cassette recorder, Videodisc, Videotape, Videotape recorder, Vienna, Congress of Vienna, Vientiane, Vietnam, Vietnam Veterans Memorial, Vietnam War, Vikings, Heitor Villa-Lobos, Pancho Villa, Henry Villard, Edward Joseph Villella, Vilnius, Battle of Vimy Ridge, Vincennes, Leonardo da Vinci, Vine, Vinegar, Vinegar eel, Vinland, Frederick Moore Vinson, Vinyl, Vinyl chloride, Viol…
Water meter, Water moccasin, Water pipit, Water plant, Water pollution, Water polo, Water power, Water-skiing, Water snake, Water softening, Water wheel, Watermelon, Ethel Waters, Waterspout, Stand Watie, James Dewey Watson, John Broadus Watson, Thomas Edward Watson, Thomas John Watson, Sir Robert Alexander Watson-Watt, James Watt, Jean-Antoine Watteau, Wattmeter, Watusi, Waugh, Wave, Archibald Percival Wavell t earl (1s), Wax, Wax myrtle, Waxwing, Anthony Wayne, John Wayne…
Friedrich Wöhler, Will-o'-the-wisp, Willamette River, Emma Hart Willard, Frances Elizabeth Caroline Willard, Willemstad, Willet, William, William the Conqueror, William I, prince of Orange William I, William and College of Mary, William of Ockham, Daniel Hale Williams, Emlyn Williams, Roger Williams, Roy Lee Williams, Shirley Williams, Ted Williams, Tennessee Williams, William Williams, William Carlos Williams, Williamsburg, Hugh Williamson, Wendell Lewis Willkie, Willow, Willow herb, Helen Newington Wills, Wilmington…
Yüan Shih-k'ai, Yap Islands, Yaqui, Yawning, Yaws, Yazoo Fraud, Yazoo River, Chuck Yeager, Year, Yeast, William Butler Yeats, Yeh Chien-Ying, Yellow, Yellow daisy, Yellow-dog contract, Yellow fever, Yellow jacket, Yellow journalism, Yellow poplar, Yellow River, Yellow Sea, Yellowhammer, Yellowknife, Yellowlegs, Yellowstone National Park, Yellowstone River, Yellowthroat, Boris Nikolayevich Yeltsin, Yemen, Yenisey River, Yeoman, Yerevan, Yerkes Observatory, Yevgeny Yevtushenko, Yew…