Kenneth J. Arrow was an American economist known for his contributions to welfare economics and to general economic equilibrium theory. He was cowinner (with Sir John R. Hicks) of the Nobel Prize for Economics in 1972. Perhaps his most startling thesis (built on elementary mathematics) was the

poison frog, (family Dendrobatidae), any of approximately 180 species of New World frogs characterized by the ability to produce extremely poisonous skin secretions. Poison frogs inhabit the forests of the New World tropics from Nicaragua to Peru and Brazil, and a few species are used by South

bow and arrow: Arrowheads have been made of shaped flint, stone, metal, and other hard materials.

arrowhead, (genus Sagittaria), genus of plants of the family Alismataceae, consisting of at least 28 species distributed worldwide, having leaves resembling arrowpoints. Arrowheads are perennial herbs with fleshy rhizomes (and frequently with tubers) that grow in shallow lakes, ponds, and streams.

arrowroot, any of several species of the genus Maranta, members of the family Marantaceae, the rhizomes, or rootstocks, of which yield an edible starch. The most commonly used species is M. arundinacea, the source of genuine, or West Indies, arrowroot. This herbaceous perennial, a native of Guyana

Marantaceae, the prayer plant or arrowroot family (order Zingiberales), composed of about 31 genera and about 550 species. Members of the family are native to moist or swampy tropical forests, particularly in the Americas but also in Africa and Asia. Several species are cultivated as ornamentals or

Arrowsmith, novel by Sinclair Lewis, published in 1925. The author declined to accept a Pulitzer Prize for the work because he had not been awarded the prize for his Main Street in 1921. The narrative concerns the personal and professional travails of Martin Arrowsmith, a Midwestern physician.

Aaron Arrowsmith was a British geographer and cartographer who engraved and published many fine maps and atlases based on the best available sources of the day. Without a formal education Arrowsmith went to London c. 1770 and, after working as a surveyor, established himself as a mapmaker and

viburnum: …toothed, oval leaves; and the arrowwood (V. dentatum), with roundish to oval, coarsely toothed leaves. Laurustinus (V. tinus), a 3-metre-tall evergreen with oblong leaves, is native to the Mediterranean area. Sweet viburnum (V. odoratissimum), from India and Japan, bears dark-green, shiny, evergreen leaves and large clusters of fragrant flowers.

arrowworm, any member of a group of free-living wormlike marine carnivores that belong to the invertebrate phylum Chaetognatha. The bodies of arrowworms appear transparent to translucent or opaque and are arrow shaped. There are more than 120 species, most of which are in the genus Sagitta. The

arroyo, a dry channel lying in a semiarid or desert area and subject to flash flooding during seasonal or irregular rainstorms. Such transitory streams, rivers, or creeks are noted for their gullying effects and especially for their rapid rates of erosion, transportation, and deposition. There have

Ecuador: Economic development and loss of territory in the 1940s: Carlos Arroyo del Río, Ecuador drew some benefit from the higher prices for raw materials caused by the war, and the early years of the war were relatively prosperous and tranquil.

Gloria Macapagal Arroyo is a Filipino politician who was president of the Philippines (2001–10). Arroyo’s father, Diosdado P. Macapagal, was president of the Philippines from 1961 to 1965. Arroyo studied economics at Georgetown University in Washington, D.C., where she began a lasting friendship

Pedro Arrupe was the 28th superior general (1965–83) of the Society of Jesus. Known for his spiritual depth and commitment to justice, Arrupe helped guide the Jesuit order through the changes of the Second Vatican Council (1962–65) and refocused the Jesuits with a “preferential option for the

Carlos Arruza was a Mexican bullfighter, the dominant Mexican matador and one of the greatest of any nationality in modern times. Born in Mexico of Spanish parents, he began as a professional torero at the age of 14 in Mexico City. He went to Spain in 1944 billed as “El Ciclón” and soon was ranked

St. John Vianney: …of the small village of Ars, which he made a model parish and from which reports of his holiness and his supernatural powers soon spread. He was known for his devotion to the Virgin Mary and to St. Philomena and was dedicated to the sacrament of reconciliation (confession) for his…

Himmerland: At Års, the main town of the interior, the Vesthimmerlands Museum displays prehistoric and folk artifacts. Himmerland is a predominantly rural region of villages and farms. Although much of the former wetland has been drained, the leached soils are not highly fertile, and peat bogs still…

Ars amatoria, poem by Ovid, published about 1 bce. Ars amatoria comprises three books of mock-didactic elegiacs on the art of seduction and intrigue. One of the author’s best-known works, it contributed to his downfall in 8 ce on allegations of immorality. The work, which presents a fascinating

Ars Antiqua, (Medieval Latin: “Ancient Art”), in music history, period of musical activity in 13th-century France, characterized by increasingly sophisticated counterpoint (the art of combining simultaneous voice parts), that culminated in the innovations of the 14th-century Ars Nova (q.v.). The

Ars Antiqua: …mid-13th century), a theorist, whose Ars cantus mensurabilis (“The Art of Measured Song”) served to organize and codify the newly formed mensural system (a more precise system of rhythmic notation, the direct ancestor of modern notation); and Pierre de la Croix (flourished last half of 13th century), whose works anticipate…

Jakob Bernoulli: Jakob Bernoulli’s pioneering work Ars Conjectandi (published posthumously, 1713; “The Art of Conjecturing”) contained many of his finest concepts: his theory of permutations and combinations; the so-called Bernoulli numbers, by which he derived the exponential series; his treatment of mathematical and moral predictability; and the subject of probability—containing what…

Ramon Llull: …is collectively known as the Ars magna (1305–08; “The Great Art”) and includes the treatises Arbor scientiae (“The Tree of Knowledge”) and Liber de ascensu et descensu intellectus (“The Book of the Ascent and Descent of the Intellect”). Llull attempted to place Christian apologetics on the level of rational discussion,…

Girolamo Cardano: …whose book Ars magna (The Great Art; or, The Rules of Algebra) is one of the cornerstones in the history of algebra.

Ramon Llull: …is collectively known as the Ars magna (1305–08; “The Great Art”) and includes the treatises Arbor scientiae (“The Tree of Knowledge”) and Liber de ascensu et descensu intellectus (“The Book of the Ascent and Descent of the Intellect”). Llull attempted to place Christian apologetics on the level of rational discussion,…

Aelius Donatus: …and a small school grammar, Ars maior and Ars minor. The latter was written for young students and gives, by question and answer, elementary instruction in the eight parts of speech. It remained in use throughout the European Middle Ages, and its author’s name in the forms donat and donet…

Aelius Donatus: …school grammar, Ars maior and Ars minor. The latter was written for young students and gives, by question and answer, elementary instruction in the eight parts of speech. It remained in use throughout the European Middle Ages, and its author’s name in the forms donat and donet came to mean…

Ars Nova, (Medieval Latin: “New Art”), in music history, period of the tremendous flowering of music in the 14th century, particularly in France. The designation Ars Nova, as opposed to the Ars Antiqua (q.v.) of 13th-century France, was the title of a treatise written about 1320 by the composer

Philippe de Vitry: …and authoritative treatise of music Ars nova (c. 1320; “New Art”), which dealt with the theoretical aspects of French music in the first half of the 14th century. It included an explanation of new theories of mensural notation, a detailed account of the various uses and meanings of the coloured…

history of logic: The properties of terms and discussions of fallacies: …were known collectively as the Logica nova (“New Logic”). In a flurry of activity, others in the 12th and 13th centuries produced additional translations of these works and of Greek and Arabic commentaries on them, along with many other philosophical writings and other works from Greek and Arabic sources.

Jean de Muris: In his treatise Ars novae musicae (1319; “The Art of the New Music”) he enthusiastically supported the great changes in musical style and notation occurring in the 14th century and associated with the composer and theorist Philippe de Vitry, whose book, Ars Nova (1320; “The New Art”), gave…

Ars poetica, work by Horace, written about 19–18 bce for Piso and his sons and originally known as Epistula ad Pisones (Epistle to the Pisos). The work is an urbane, unsystematic amplification of Aristotle’s discussion of the decorum or internal propriety of each literary genre, which at Horace’s

history of logic: Transmission of Greek logic to the Latin West: …were known collectively as the Logica vetus (“Old Logic”).

Artaxerxes II was an Achaemenid king of Persia who reigned during the late 5th and early 4th centuries BC. He was the son and successor of Darius II and was surnamed (in Greek) Mnemon, meaning “the mindful.” When Artaxerxes took the Persian throne, the power of Athens had been broken in the

Artabanus III: …his son, known only as Arsaces, on the Armenian throne. Two Parthian nobles, apparently restless at Artabanus’ assertion of central authority, applied to the Roman emperor Tiberius for a king from among the descendants of an earlier king, Phraates IV. Thus, a grandson of Phraates, Tiridates III, arrived in Syria…

Arsaces, Iranian name borne by the Parthian royal house as being descended from Arsaces, son of Phriapites (date unknown), a chief of the seminomadic Parni tribe from the Caspian steppes. The first of his line to gain power in Parthia was Arsaces I, who reigned from about 250 to about 211 bc. (Some

Andragoras: …the Caspian steppes led by Arsaces, who later set up an independent kingdom in Parthia.

Artabanus I was the king of Parthia (reigned 211–191 bc) in southwestern Asia. In 209 he was attacked by the Seleucid king Antiochus III of Syria, who took Hecatompylos, the Arsacid capital (the present location of which is uncertain), and Syrinx in Hyrcania. Finally, however, Antiochus concluded a

Mithradates I was the king of Parthia (reigned 171–138 bc); he succeeded his brother Phraates I. Before 160 Mithradates I seized Media from the Seleucid ruler Timarchus. Turning to the east, he won two provinces, Tapuria and Traxiana, from the Bactrian king Eucratides. Mithradates then captured the

Rayy, formerly one of the great cities of Iran. The remains of the ancient city lie on the eastern outskirts of the modern city of Shahr-e Rey, which itself is located just a few miles southeast of Tehrān. A settlement at the site dates from the 3rd millennium bce. Rayy is featured in the Avesta

Arsacid dynasty, (247 bc–ad 224), ancient Iranian dynasty that founded and ruled the Parthian empire. The progenitors of the dynasty were members of the Parni tribe living east of the Caspian Sea. They entered Parthia (q.v.) shortly after the death of Alexander the Great (323 bc) and gradually

grebe, (order Podicipediformes), any member of an order of foot-propelled diving birds containing a single family, Podicipedidae, with about 20 species. They are best known for the striking courtship displays of some species and for the silky plumage of the underparts, which formerly was much used

History of film: The Soviet Union: …different stages of Ukrainian history; Arsenal (1929), an epic film poem about the effects of revolution and civil war upon the Ukraine; and Zemlya (Earth, 1930), which is considered to be his masterpiece. Earth tells the story of the conflict between a family of wealthy landowning peasants (kulaks) and the…

Arsenal, English professional football (soccer) team based in London. Arsenal is one of the most successful squads in English football history, having played in the country’s top division (Football League First Division to 1992, Premier League thereafter) each season since 1919. In the process it

shipyard: …reached a culmination in the arsenal of Venice, a shipyard in which a high degree of organization produced an assembly-line technique, with a ship’s fittings added to the completed hull as it was floated past successive docks. In 18th-century British shipyards, the hull was towed to a floating stage called…

Arsenal, English professional football (soccer) team based in London. Arsenal is one of the most successful squads in English football history, having played in the country’s top division (Football League First Division to 1992, Premier League thereafter) each season since 1919. In the process it

arsenate mineral, any of a group of naturally occurring compounds of arsenic, oxygen, and various metals, most of which are rare, having crystallized under very restricted conditions. At the mineralogically famous Långban iron and manganese mines in central Sweden, more than 50 species of arsenate

Belarus: Literature: … (1937) and Kalinowski (1938), and Natalla Arseneva, whose greatest poems are to be found in the collections Beneath the Blue Sky (1927), Golden Autumn (1937), and Today (1944).

arsenic (As), a chemical element in the nitrogen group (Group 15 [Va] of the periodic table), existing in both gray and yellow crystalline forms. atomic number 33 atomic weight 74.921595 melting point (gray form) 814 °C (1,497 °F) at 36 atmospheres pressure density (gray form) 5.73 g/cm3 at 14 °C

Frank Capra: The 1940s: …and Old Lace, a huge stage hit whose creators sold its rights on condition that the film version not be released until the Broadway run had completed. As a result, although Capra finished filming in December 1941, the film was not released until 1944. Cary Grant gave what some critics…

Frank Capra: The 1940s: …on the motion-picture adaptation of Arsenic and Old Lace, a huge stage hit whose creators sold its rights on condition that the film version not be released until the Broadway run had completed. As a result, although Capra finished filming in December 1941, the film was not released until 1944.…

amorphous solid: Models of atomic scale structures: …to current models for the arsenic chalcogenide glasses As2S3 and As2Se3. (Sulfur, S, and selenium, Se, belong to the group of elements called chalcogens.) The model was introduced as a schematic analogue for the network structure of the oxide glasses. The prototypical oxide glass is amorphous SiO2, or silica glass.…

arsine, colourless, extremely poisonous gas composed of arsenic with hydrogen (see

arsenic: Commercial production and uses: Arsenic pentoxide is formed by the action of an oxidizing agent (e.g., nitric acid) on arsenious oxide. It comprises a major ingredient of insecticides, herbicides, and metal adhesives.

arsenic poisoning, harmful effects of various arsenic compounds on body tissues and functions. Arsenicals are used in numerous products, including insect, rodent, and weed killers, some chemotherapeutic agents, and certain paints, wallpaper, and ceramics. Arsenic poisoning in humans most often

amorphous solid: Amorphous semiconductors in electronics: …selenium (Se) and, later, amorphous arsenic selenide (As2Se3) were used to form the thin-film, large-area photoconducting element that lies at the heart of the xerographic process. The photoconductor, which is an electrical insulator in the absence of light but which conducts electricity when illuminated, is exposed to an image of…

arsenide, any member of a rare mineral group consisting of compounds of one or more metals with arsenic (As). The coordination of the metal is almost always octahedral or tetrahedral. In the former case, each metal ion occupies a position within an octahedron composed of six oppositely charged

Serbia: The disintegration of Ottoman rule: In 1691 Archbishop Arsenije III Crnojević of Peć led a migration of 30,000–40,000 Serbs from “Old Serbia” and southern Bosnia across the Danube and Sava. There they were settled and became the basis of the Austrian Militärgrenze, or Military Frontier. (The South Slav translation, Vojna Krajina, was used…

Television in the United States: The late shows: …own successful late-night talk show, The Arsenio Hall Show, in syndication from 1989 to 1994.

arsenic: Commercial production and uses: …principal forms of which are arsenious oxide (As4O6) and arsenic pentoxide (As2O5). Arsenious oxide, commonly known as white arsenic, is obtained as a by-product from the roasting of the ores of copper, lead, and certain other metals as well as by the roasting of arsenopyrite and arsenic sulfide ores. Arsenious…

Byzantine Empire: The empire under the Palaeologi: 1261–1453: …what was known as the Arsenite schism in the Byzantine Church. Many in Anatolia, loyal to the memory of the Lascarid emperors who had enriched and protected them, condemned Michael VIII as a usurper.

Arsenius Autorianus was the patriarch of Constantinople, whose deposition caused a serious schism in the Byzantine Church. He took the name Arsenius on being appointed patriarch of Nicaea in 1255 by the Byzantine emperor Theodore II Lascaris. In 1259 he crowned John IV, Theodore’s son and

Arsenius the Great ; feast day July 19) was a Roman noble, later monk of Egypt, whose asceticism among the Christian hermits in the Libyan Desert caused him to be ranked among the celebrated Desert Fathers and influenced the development of the monastic and contemplative life in Eastern and Western

Arsenius the Great ; feast day July 19) was a Roman noble, later monk of Egypt, whose asceticism among the Christian hermits in the Libyan Desert caused him to be ranked among the celebrated Desert Fathers and influenced the development of the monastic and contemplative life in Eastern and Western

arsenopyrite, an iron sulfoarsenide mineral (FeAsS), the most common ore of arsenic. It is most commonly found in ore veins that were formed at high temperatures, as at Mapimí, Mex.; Butte, Mont.; and Tunaberg, Swed. Arsenopyrite forms monoclinic or triclinic crystals with an orthorhombic shape;

Ussuri River: … (Xingkai); and the Ulakhe and Arsenyevka rivers, both of which rise on the southwestern slopes of the Sikhote-Alin mountain complex. Its length from the source of the Ulakhe is 565 miles (909 km), and its basin is 72,200 square miles (187,000 square km) in area. The Ussuri is navigable from…

Arses was an Achaemenid king of Persia who reigned from November 338–June 336 bc. He was the youngest son of Artaxerxes III Ochus and Atossa. Arses had been placed on the throne by the eunuch Bagoas, who had murdered Arses’ father and all his brothers. Little is known of Arses’ short reign; the

Sanatruces was the king of Parthia from 76/75 to 70/69 bc, who restored unity to his kingdom. Sanatruces may have been a son of Mithradates I (reigned 171–138), the Parthian king who had established the kingdom’s power. Following the death of King Mithradates II in 88 bc, dynastic struggles

Arsacid dynasty, (247 bc–ad 224), ancient Iranian dynasty that founded and ruled the Parthian empire. The progenitors of the dynasty were members of the Parni tribe living east of the Caspian Sea. They entered Parthia (q.v.) shortly after the death of Alexander the Great (323 bc) and gradually

Artie Shaw was an American clarinetist and popular bandleader of the 1930s and ’40s. He was one of the few outstanding jazz musicians whose commitment to jazz was uncertain. Shaw began playing in high school and turned professional in 1925. The first signs of indecision became apparent in the early

Savara: …Jati Savara are cultivators; the Arsi, weavers of cloth; the Muli, workers in iron; the Kindal, basket makers; and the Kumbi, potters. The traditional social unit is the extended family, including both males and females descended from a common male ancestor.

arsine, colourless, extremely poisonous gas composed of arsenic with hydrogen (see

Famagusta, major port in the Turkish Cypriot-administered portion of northern Cyprus. It lies on the island’s east coast in a bay between Capes Greco and Eloea and is about 37 miles (55 km) east of Nicosia. The port possesses the deepest harbor in Cyprus. Famagusta is a Frankish corruption of its

Al-Fayyūm: …has many ancient sites, including Shedet (later Crocodilopolis), chief center for worship of the crocodile-god Sebek, near which Al-Fayyūm town now lies. In the time of the Ptolemies, Setje was named Arsinoe after the wife of Ptolemy II Philadelphus. Since pharaonic times Al-Fayyūm’s irrigation waters, its lifeline, have been controlled…

Arsinoe I was the queen of ancient Egypt, daughter of Lysimachus, king of Thrace, and first wife of Ptolemy II Philadelphus. Although she bore Ptolemy three children, including his successor, she was unable to prevent him from repudiating her and marrying his sister, Arsinoe II. Arsinoe I was

Arsinoe II was the queen (basilissa) of Thrace and Macedonia and, later, the wife of her younger brother, King Ptolemy II Philadelphus of Egypt, and possibly his coruler. It has been inferred by modern historians that she wielded great power in both roles, though the extent of that power is

Arsinoe III was the daughter of Queen Berenice II and Ptolemy III Euergetes of Egypt, sister and wife of Ptolemy IV Philopator. Powerless to arrest the decline of the Ptolemaic kingdom under her debauched husband’s rule, the popular queen was eventually murdered by the royal ministers. In 217

Arsinoe IV was the youngest daughter of the Macedonian king Ptolemy XII Auletes of Egypt, sister of Cleopatra VII and the kings Ptolemy XIII and XIV. During the Alexandrian war, Arsinoe attempted to lead the native forces against Cleopatra, who had allied herself with Julius Caesar. Upon landing in

Arsinoitherium, genus of extinct large, primitive, hoofed mammals that have been found as fossils in Egypt in deposits from the Eocene Epoch (56 million to 34 million years ago) and elsewhere in deposits from the Oligocene Epoch (34 million to 23 million years ago). The animal, probably a swamp

arsis and thesis, in prosody, respectively, the accented and unaccented parts of a poetic foot. Arsis, a term of Greek origin meaning “the act of raising or lifting” or “raising the foot in beating time,” refers in Greek, or quantitative, verse to the lighter or shorter part of a poetic foot, and

Lake Van, lake, largest body of water in Turkey and the second largest in the Middle East. The lake is located in the region of eastern Anatolia near the border of Iran. It covers an area of 1,434 square miles (3,713 square km) and is more than 74 miles (119 km) across at its widest point. Known to

Qarluq confederation: …tribal leader was always called arslan (“lion”), while the western tribal chief, the paramount leader of the Qarluq, held the title of bughra (“camel”).

Eldegüzid dynasty: …stepson, the infant Seljuq prince Arslan. During the next three decades the Eldegüzids, using their position as atabegs of Seljuq princes, expanded their territories in Iran as far south as Isfahan and northward in the Caucasus to the borders of Shīrvān and Georgia. In 1191 the Seljuq sultan Toghrïl III…

Islamic arts: Arab literatures: …rank of Arab intellectuals were Amīr Shakīb Arslān (died 1946), of Druze origin, and Muḥammad Kurd ʿAlī (died 1953), the founder of the Arab Academy of Damascus, each of whom, by encouraging a new degree of awareness, made an important contribution to the education of modern historians and persons of…

Milid, ancient city near the upper Euphrates River in east-central Turkey, 4 miles (6.5 km) northeast of the town of Malatya. The site was first inhabited in the 4th millennium bc and later became an important city of the Hittites until the dissolution of their empire early in the 12th century bc.

Anatolia: Early Bronze Age: A possible temple at Arslantepe-Malatya had a heavily built T-shaped plan and walls decorated with painted and impressed designs. Beycesultan houses had megarons—large central halls with porches at either end—arranged in pairs with circular hearths backed by twin stelae and clay horns, suggesting an affinity with Cretan cults and…

arson, crime commonly defined by statute as the willful or malicious damage or destruction of property by means of fire or explosion. In English common law, arson referred to the burning of another person’s dwellings under circumstances that endangered human life. Modern statutes have expanded this

ocean thermal energy conversion: …the French engineer Jacques-Arsène d’Arsonval. His idea called for a closed-cycle system, a design that has been adapted for most present-day OTEC pilot plants. Such a system employs a secondary working fluid (a refrigerant) such as ammonia. Heat transferred from the warm surface ocean water causes the working fluid…

ocean thermal energy conversion: …the French engineer Jacques-Arsène d’Arsonval. His idea called for a closed-cycle system, a design that has been adapted for most present-day OTEC pilot plants. Such a system employs a secondary working fluid (a refrigerant) such as ammonia. Heat transferred from the warm surface ocean water causes the working fluid…

ocean thermal energy conversion: …the French engineer Jacques-Arsène d’Arsonval. His idea called for a closed-cycle system, a design that has been adapted for most present-day OTEC pilot plants. Such a system employs a secondary working fluid (a refrigerant) such as ammonia. Heat transferred from the warm surface ocean water causes the working fluid…

Battle of Arsūf, famous victory won by the English king Richard I (Richard the Lion-Heart) during the Third Crusade. Richard, having taken Acre in July 1191, was marching to Joppa (Jaffa), but the Muslim army under Saladin slowed down the Crusaders’ progress when they advanced from Caesarea, which

Macedonian literature: …dramatists, such as Kole Čašule, Tome Arsovski, and Goran Stefanovski. Čašule also wrote several novels. A main theme of his work is the defeat of idealists and idealism. His play Crnila (1960; “Black Things”) deals with the early 20th-century murder of a Macedonian national leader by other Macedonians and with…

history of medicine: Ehrlich and arsphenamine: …Hata, he conducted tests on arsphenamine, once sold under the commercial name Salvarsan. Their success inaugurated the chemotherapeutic era, which was to revolutionize the treatment and control of infectious diseases. Salvarsan, a synthetic preparation containing arsenic, is lethal to the microorganism responsible for syphilis. Until the introduction of the antibiotic…

traffic control: Traffic elements: …aircraft-mounted technologies are supplemented by air route surveillance radar, which monitors aircraft within each designated sector of the air route traffic control system. The radar-based systems form the backbone of the navigation aids for privately owned aircraft and small passenger-carrying planes. Major commercial jets are now supplied with inertial navigation…

Baybars I: …he received the surrender of Arsūf from the Knights Hospitalers. He occupied ʿAtlit and Haifa, and in July 1266 he received the town of Safed from the Knights Templar garrison after a heavy siege. Two years later, Baybars turned toward Jaffa, which he captured without resistance. The most important town…

Battle of Arsūf, famous victory won by the English king Richard I (Richard the Lion-Heart) during the Third Crusade. Richard, having taken Acre in July 1191, was marching to Joppa (Jaffa), but the Muslim army under Saladin slowed down the Crusaders’ progress when they advanced from Caesarea, which

Ivittuut: …on the 20-mile- (32-km-) long Arsuk Fjord, southeast of Paamiut (Frederikshåb). Nearby is a large open-pit cryolite mine (deposit discovered in 1794), which used to be of major economic importance to Greenland. Although the mine was closed in 1963, the stockpiled cryolite was exported until the late 1980s. The community…

Yasmina Reza: It was Art however, which premiered in 1994, that brought Reza wide notice. In the play three friends quarrel over a work of modern art—which is, in effect, a blank canvas—thereby showing just how fragile friendship can be. The play was in production on major stages worldwide…

Louise Brown: …four decades IVF and other assisted reproductive technologies (ARTs) produced more than eight million babies globally.

Clive Bell: …as described in his books Art (1914) and Since Cézanne (1922). He asserted that purely formal qualities—i.e., the relationships and combinations of lines and colours—are the most important elements in works of art. The aesthetic emotion aroused in the viewer by a painting springs primarily from an apprehension of its…

art, a visual object or experience consciously created through an expression of skill or imagination. The term art encompasses diverse media such as painting, sculpture, printmaking, drawing, decorative arts, photography, and installation. (Read Sister Wendy’s Britannica essay on art appreciation.)