Andrei Okounkov: …and his coauthor, American mathematician Richard Kenyon, discovered the remarkable result that the outline of any two-dimensional picture of the crystal is always an algebraic curve and so is defined by polynomial equations (equations of the form p(x) = a0 + a1x + a2x2 + ⋯ + anxn).

Ozaki Kōyō: …of friends, he formed the Kenyūsha, a magazine and literary association that exercised a major influence in the development of the Japanese novel for nearly 20 years. Through his study of Tokugawa period (1603–1867) literature, he led a revival of interest in the 17th-century writer Ihara Saikaku, whose sharp perceptions…

Ogata Kenzan was a Japanese potter and painter, brother to the artist Ogata Kōrin. He signed himself Kenzan, Shisui, Tōin, Shōkosai, Shuseidō, or Shinshō. Kenzan received a classical Chinese and Japanese education and pursued Zen Buddhism. At the age of 27 he began studying with the potter Ninsei

Barry Keoghan is an Irish actor known for his idiosyncratic, sometimes unsettling performances in such films as The Killing of a Sacred Deer (2017), The Banshees of Inisherin (2022), and Saltburn (2023). Keoghan was raised in the hardscrabble Dublin neighborhood of Summerhill. He never knew his

Nannerl Overholser Keohane is an American academician and administrator who gained particular prominence when she became the first woman president of Duke University in Durham, N.C. Keohane received an undergraduate degree from Wellesley (Massachusetts) College in 1961. She studied for the next two

Robert O. Keohane is an American political scientist, international-relations scholar, and educator. He is a leading figure within neoliberal institutionalism, an approach to international relations that emphasizes the use of international institutions by states to further their interests through

Robert O. Keohane is an American political scientist, international-relations scholar, and educator. He is a leading figure within neoliberal institutionalism, an approach to international relations that emphasizes the use of international institutions by states to further their interests through

Keokuk, city, Lee county, extreme southeastern Iowa, U.S. It lies along the Mississippi River (bridged to Hamilton, Illinois) at the mouth of the Des Moines River, about 40 miles (65 km) southwest of Burlington. The first settler in the area, Samuel C. Muir, arrived in 1820, and a trading post was

Keokuk was a Sauk (Sac) Indian orator and politician who became chief by ceding Native American lands to win white support and by rallying opposition to his own tribe’s resistance leaders. Born of the Fox clan, Keokuk early exhibited physical prowess, keen intelligence, and a gift of persuasion. He

Keoladeo National Park, wildlife sanctuary in eastern Rajasthan state, northwestern India, just south of the city of Bharatpur. It was founded in the late 19th century as a hunting preserve by Suraj Mal, the maharaja of Bharatpur princely state, and became a bird sanctuary in 1956. Declared a

Toronto Maple Leafs: …Bower, centre Red Kelly, centre Dave Keon, defenseman Tim Horton, left wing Frank Mahovlich, left wing Bob Pulford, and defenseman Allan Stanley) won three Stanley Cups in a row from 1961–62 to 1963–64 and one more during the 1966–67 season.

Kendujhar, town, northern Odisha (Orissa) state, eastern India. It is situated on an upland plateau bordered to the west and south by low hills. Kendujhar is a trade centre for the farm and forest products of the surrounding area. Hand-loom weaving is also important. The town contains an old raja’s

Kendujhar, town, northern Odisha (Orissa) state, eastern India. It is situated on an upland plateau bordered to the west and south by low hills. Kendujhar is a trade centre for the farm and forest products of the surrounding area. Hand-loom weaving is also important. The town contains an old raja’s

Kéa, westernmost of the Cyclades (Modern Greek: Kykládes) group of Greek islands in the Aegean Sea. It constitutes a dímos (municipality) in the South Aegean (Nótio Aigaío) periféreia (region). Kéa lies about 13 miles (21 km) east of the southern tip of Attica (Attikí). With an area of 50.4 square

Iao Valley: Kepaniwai Park and Heritage Gardens, near the valley entrance and Wailuku, has landscaped gardens representing Hawaii’s various cultures. Iao Stream is dammed there to provide wading and swimming pools.

Iao Valley: …feature commemorates the bloody 1790 battle of Kepaniwai (meaning “Dammed Stream,” referring to the blockage of the torrent by the bodies of Maui warriors), which added Maui to the kingdom of Kamehameha I.

Gyorgy Kepes was a Hungarian-born American painter, designer, photographer, teacher, and writer who had considerable influence on many areas of design. Shortly after his graduation in 1928 from the Royal Academy of Fine Art in Budapest, Kepes experimented with photograms, photographic prints made

ancient Iran: Manichaeism: …a large part of the Kephalaia, a collection of the religious injunctions of Mani, was recovered in a Coptic version found in Egypt. These texts can now be collated with the versions of Manichaean doctrines as reported by the Church Fathers, including St. Augustine. From this cumulative documentation, to which…

Appalachian Mountains: Study and exploration: It remained for Horace Kephart, a St. Louis, Missouri, librarian turned naturalist who came to the southern mountains in 1904, to bring the isolated and scenic region to national attention. From his writings grew the interest and impetus that led to the establishment of the Great Smoky Mountains…

John Banville: Fiction: Doctor Copernicus (1976), Kepler (1981), and The Newton Letter: An Interlude (1982) are fictional biographies based on the lives of noted scientists. These three works use scientific exploration as a metaphor to question perceptions of fiction and reality. Mefisto (1986) is written from the point of view of…

Kepler, U.S. satellite that detected extrasolar planets by watching—from orbit around the Sun—for a slight dimming during transits as these bodies passed in front of their stars. An important objective of Kepler’s mission was to determine the percentage of planets that are in or near their stars’

combinatorics: Packing and covering: Another famous problem was Kepler’s conjecture, which concerns the densest packing of spheres. If the spheres are packed in cannonball fashion—that is, in the way cannonballs are stacked to form a triangular pyramid, indefinitely extended—then they fill π/18, or about 0.74, of the space. In 1611 the German astronomer…

conic section: Post-Greek applications: …Johannes Kepler derived his first law of planetary motion: A planet travels in an ellipse with the Sun at one focus. Galileo Galilei published the first correct description of the path of projectiles—a parabola—in his Dialogues of the Two New Sciences (1638). In 1639 the French engineer Girard Desargues initiated…

Kepler’s laws of planetary motion, in astronomy and classical physics, laws describing the motions of the planets in the solar system. They were derived by the German astronomer Johannes Kepler, whose analysis of the observations of the 16th-century Danish astronomer Tycho Brahe enabled him to

Kepler’s Nova, one of the few supernovae (violent stellar explosions) known to have occurred in the Milky Way Galaxy. Jan Brunowski, Johannes Kepler’s assistant, first observed the phenomenon in October 1604; Kepler studied it until early 1606, when the supernova was no longer visible to the

Kepler’s second law of planetary motion, in astronomy and classical physics, one of three laws describing the motions of the planets in the solar system and which states that a radius vector joining any planet to the Sun sweeps out equal areas in equal lengths of time. The validity of Kepler’s

Kepler’s Nova, one of the few supernovae (violent stellar explosions) known to have occurred in the Milky Way Galaxy. Jan Brunowski, Johannes Kepler’s assistant, first observed the phenomenon in October 1604; Kepler studied it until early 1606, when the supernova was no longer visible to the

Kepler’s Nova, one of the few supernovae (violent stellar explosions) known to have occurred in the Milky Way Galaxy. Jan Brunowski, Johannes Kepler’s assistant, first observed the phenomenon in October 1604; Kepler studied it until early 1606, when the supernova was no longer visible to the

mechanics: Circular orbits: …case (for circular orbits) of Kepler’s third law, which is discussed in the article celestial mechanics. Using the fact that v = 2πr/T, where 2πr is the circumference of the orbit and T is the time to make a complete orbit (i.e., T is one year in the life of…

Johannes Kepler German astronomer who discovered three major laws of planetary motion, conventionally designated as follows: (1) the planets move in elliptical orbits with the Sun at one focus; (2) the time necessary to traverse any arc of a planetary orbit is proportional to the area of the sector

Kepler-186f, the first Earth-sized extrasolar planet to be found within its star’s habitable zone—the orbital region where an Earth-like planet could possess liquid water on its surface and thus possibly support life. Kepler-186f was discovered in 2014 in data taken by the Kepler satellite before

extrasolar planet: Directions for future research: …the first Earth-sized extrasolar planets, Kepler-20e and Kepler-20f (with radii 0.87 and 1.03 times the radius of Earth, respectively). By the end of its mission in 2018, Kepler had discovered 2,741 planets, about two-thirds of all then known extrasolar planets. Thousands more candidate planets awaited confirmation.

extrasolar planet: Directions for future research: …Earth-sized extrasolar planets, Kepler-20e and Kepler-20f (with radii 0.87 and 1.03 times the radius of Earth, respectively). By the end of its mission in 2018, Kepler had discovered 2,741 planets, about two-thirds of all then known extrasolar planets. Thousands more candidate planets awaited confirmation.

Kepler: One of these, Kepler-22b, has a radius 2.4 times that of Earth and was the first planet found within the habitable zone of a star like the Sun. Kepler-20e and Kepler-20f were the first Earth-size planets to be found (their radii are 0.87 and 1.03 times the radius…

Kepler-452b, the first approximately Earth-sized planet to be found in a Sun-like star’s habitable zone—the orbital region where an Earth-like planet could possess liquid water on its surface and thus possibly support life. Kepler-452b was discovered in 2015, in data that the Kepler satellite had

Keplerian telescope, instrument for viewing distant objects, the basis for the modern refractive telescope, named after the great German astronomer Johannes Kepler. Its eyepiece, or ocular, is a convex (positive, or convergent) lens placed in back of the focus, the point at which the parallel light

Epicurus: The schools at Athens and elsewhere: …bought a house and, in the garden, established a school, which came to be known as Ho Kepos (The Garden). At this time in Athens, cultural life was dominated by the Academy of Plato and the Lyceum of Aristotle, both of which had passed into the hands of successors. These…

jazz: Field hollers and funeral processions: forming the matrix: and cornetists Bunk Johnson and Freddie Keppard—four of the most gifted early jazz musicians—arrived at similar conclusions before 1920.

Keppel Bay, inlet of the Pacific Ocean, indenting eastern Queensland, Australia. It is about 30 miles (48 km) long and 12 miles (19 km) wide and is protected from the sea by Curtis Island (east). The Keppel Islands lie in the northern section of the inlet near the mouth of the Fitzroy River.

Singapore: …gateways (Jurong port, Container Terminal, Keppel, Telok Ayer, Sembawang, and Pasir Panjang wharves) that provide facilities for vessels ranging from oceangoing liners to lighters. The Keppel wharves, which lie protected between the islands of Brani and Sentosa, are deepwater and contain major docks and warehouses. Keppel is Southeast Asia’s major…

Niuatoputapu, one of the northernmost islands of Tonga, in the southwestern Pacific Ocean. Of volcanic origin, the island has an area of 6 square miles (16 square km) and rises to 479 feet (146 metres). It is part of the Niuatoputapu, or Niuas, group of islands that also includes Niuafoʿou and

Augustus Keppel was an English admiral and politician whose career as a seagoing commander ended in a controversy of political origin during the American Revolution. A sailor from the age of 10, Keppel served actively throughout the Seven Years’ War (1756–63). In 1762 he served under Adm. Sir

Augustus Keppel was an English admiral and politician whose career as a seagoing commander ended in a controversy of political origin during the American Revolution. A sailor from the age of 10, Keppel served actively throughout the Seven Years’ War (1756–63). In 1762 he served under Adm. Sir

Joseph Keppler was an Austria-born American caricaturist and founder of Puck, the first successful humorous weekly in the United States. Keppler studied art in Vienna. Following the Revolution of 1848, his father emigrated to the United States and settled in Missouri, where Joseph joined him in

Riau Islands, propinsi (or provinsi; province), western Indonesia, that embraces some 2,000 islands in the South China Sea. The province includes, most notably, the Riau archipelago, to the south of Singapore; the Lingga archipelago, off the southeastern coast of the Indonesian province of Riau

Sawu Islands, island group in the Savu Sea, East Nusa Tenggara (Nusa Tenggara Timur) provinsi (or propinsi; province), Indonesia. The island group includes Sabu (160 square miles [414 square km]), Raijua (14 square miles [36 square km]), and several islets located about 100 miles (160 km) west of

Spratly Islands, large group of reefs, shoals, atolls, and small islets in the South China Sea of the Pacific Ocean. They are located north of insular Malaysia and are roughly midway between Vietnam and the Philippines, and they are claimed—wholly or in part—by several countries in the region. The

Ker, in ancient Greek religion, a destructive spirit. Popular belief attributed death and illness to the action of impersonal powers, often spoken of in the plural (Keres). The word was also used of an individual’s doom, with a meaning resembling the notion of destiny, as when Zeus weighs the Keres

Ma Ying-jeou: …ruling in a case involving Ker Chien-ming, a member of the DPP. Wang was expelled from the party but subsequently reinstated amid widespread support. In addition, Ker sued Ma over a wiretapped conversation between the DPP politician and Wang.

William Brennan: In his dissents in Ker v. California and Lopez v. United States (both 1963), Brennan argued for the right to privacy as implicit in the Fourth Amendment (which prohibits unlawful search and seizure). His decision for the court in Baker v. Carr (1962), which established the principle of “one…

Jill Ker Conway was an Australian-born American scholar, the first woman president of Smith College (1975–85), whose research as a historian focused on the role of feminism in American history. Jill Ker grew up in Coorain, a remote grasslands locale where her parents ran a sheep ranch. After her

Robert Carr, earl of Somerset was a favourite of King James I of England from 1607 to 1615. His influence on governmental policy was slight, but he brought discredit on James’s court by his involvement in a scandal. Son of a Scottish nobleman, the handsome Carr first attracted James’s interest in

romance: Developing psychological awareness: As W.P. Ker, a pioneer in the study of medieval epic and romance, observed in his Epic and Romance (1897), the advent of romance is “something as momentous and as far-reaching as that to which the name Renaissance is generally applied.” The Old French poets who…

Kentucky: Education: …Kentucky General Assembly passed the Kentucky Education Reform Act (KERA), a landmark piece of legislation that, most notably, provided for equal funding for all school districts based on enrollments. The goal was to achieve equitable educational opportunities for every Kentucky schoolchild. Beyond matters of finance, this act affected public education…

Al-Karak, town, west-central Jordan. It lies along the Wadi Al-Karak, 15 miles (24 km) east of the Dead Sea. Built on a small, steep-walled butte about 3,100 feet (950 metres) above sea level, the town is the Qir-hareseth, or Qir-heres, of the Bible and was one of the capitals of ancient Moab. Its

Kerala, southwestern coastal state of India. It is a small state, constituting only about 1 percent of the total area of the country. Kerala stretches for about 360 miles (580 km) along the Malabar Coast, varying in width from roughly 20 to 75 miles (30 to 120 km). It is bordered by the states of

Cochin Jews, Malayalam-speaking Jews from the Kochi (formerly Cochin) region of Kerala, located along the Malabar Coast of southwestern India. The Cochin Jews were known for their division into three castelike groups—the Paradesis (White Jews), the Malabaris (Black Jews), and the Meshuchrarim

Kerala Plains, narrow strip of coastland, southwestern India, fronting the Arabian Sea to the west and constituting almost all of Kerala state and most of the Malabar Coast. Narrow in the north and wide in the south, the plains are about 330 miles (530 km) long and from 12 to 60 miles (19 to 96 km)

Thiruvananthapuram: …is the site of the University of Kerala (1937) and its affiliated colleges and technical schools. It also has a museum, zoological gardens, an observatory, and an art gallery. A large fort contains several palaces and the Padmanabhaswamy Temple which is dedicated to the Hindu god Vishnu and is a…

Cera dynasty, rulers of an ancient kingdom in what is now Kerala state, southwestern India. Cera was one of the three major kingdoms of southern India that constituted Tamilkam (territory of the Tamils) and was centred on the Malabar Coast and its hinterland. The other two dynasties were the

Togo: Plant and animal life: In the Keran Forest Reserve near Sansanné-Mango in the north, there are wild herds of buffalo, asses, warthogs, antelope, and deer. Numerous species of birds and insects are found in the country. Fish caught off the coast include mackerel, bass, seabream, red snapper, triggerfish, dorado, ray, and…

Kerang, town, northern Victoria, Australia, on the Loddon River. Its name derives from an Aboriginal term with several possible meanings, including “cockatoo,” “parasite,” “moon,” “edible root vegetable,” or “leaves of a tree.” Settled in 1857 and declared a shire in 1871, Kerang was made (1888)

Giresun, city and seaport, northeastern Turkey. It lies along the Black Sea about 110 miles (175 km) west of Trabzon. The older parts of the city lie on a peninsula crowned by a ruined Byzantine fortress, sheltering the small natural harbour. Nearby is Giresun Island, in ancient times called Ares.

keratin, fibrous structural protein of hair, nails, horn, hoofs, wool, feathers, and of the epithelial cells in the outermost layers of the skin. Keratin serves important structural and protective functions, particularly in the epithelium. Some keratins have also been found to regulate key cellular

melanocyte: …with a group of neighbouring keratinocytes (keratin-synthesizing epidermal cells) into which its dendrites transfer pigment. This structure is known as an epidermal melanocyte unit. The melanin produced by melanocytes is of two kinds: dark brown eumelanin and pale red or yellowish phaeomelanin. Both are formed within the melanocytes by the…

keratitis, inflammation of the cornea, the transparent domelike portion of the eyeball in front of the iris and pupil. There are several varieties of keratitis, which can be caused by either infectious or noninfectious processes. In many cases, however, changes in the cornea induced by

connective tissue disease: Sjögren syndrome: …dryness of the eyes (keratoconjunctivitis sicca); dryness of the mouth (xerostomia), often coupled with enlargement of the salivary glands; and rheumatoid arthritis. Sometimes the dryness of the eyes and mouth is associated with other connective tissue diseases, such as systemic lupus erythematosus, polyarteritis nodosa, dermatomyositis, or scleroderma, rather than…

infectious bovine keratoconjunctivitis, an inflammation of the conjunctiva or the cornea of the eye in cattle as the result of an infection; early viral involvement is suspected. Moraxella bovis is usually found in discharge from the affected eye; other bacteria, such as Staphylococcus and

adenovirus: Adenoviruses can also cause epidemic keratoconjunctivitis (EKC) and are considered to be responsible for an outbreak of respiratory disease among military recruits in 1997. Like the cold viruses, adenoviruses are often found in latent infections in clinically healthy persons. Of the 47 different adenovirus species, only a few commonly cause…

connective tissue disease: Sjögren syndrome: …dryness of the eyes (keratoconjunctivitis sicca); dryness of the mouth (xerostomia), often coupled with enlargement of the salivary glands; and rheumatoid arthritis. Sometimes the dryness of the eyes and mouth is associated with other connective tissue diseases, such as systemic lupus erythematosus, polyarteritis nodosa, dermatomyositis, or scleroderma, rather than…

eye disease: Degenerative conditions of the cornea and sclera: The most common type is keratoconus, a curious condition in which the central part of the cornea, normally spherical in shape, begins to bulge and protrude forward as a cone. The only symptom is deterioration of vision due to irregular astigmatism caused by the changing corneal curvature. Contact lenses are…

LASIK: …ophthalmologists combined the technique of keratomileusis, in which the cornea is removed, frozen, reshaped, and replaced, with the technique of photorefractive keratectomy (PRK), in which a laser is used to reshape the cornea. In the LASIK procedure a hinged flap is made in the outer corneal tissue (the transparent layer…

keratosis, any protuberance on the skin resulting from the overdevelopment of the horny outermost covering of the skin, or epidermis, the main constituent of which is the protein keratin, which is synthesized in special cells of the skin, the keratinocytes. More generally, keratosis is any skin

keratosis pilaris, benign noncontagious skin condition characterized by the presence of discrete, tiny follicular papules (solid, usually conical elevations) and dry skin. Keratosis pilaris is limited to hair follicles and is most commonly seen on the outer surfaces of arms and thighs. The

joint: Joint metabolism and nutrition: …to form chondroitin sulfate and keratosulfate molecules, the main constituents of the cartilaginous material. Chondroitin sulfate could be described as a sulfonated form of hyaluronic acid, the characteristic constituent of synovial fluid. Its presence in the matrix of the cartilage, but not in the synovial fluid, shows that the chondrocytes…

Turkmenistan: The arts: Among these figures, Berdi Kerbabayev attained some renown for his novel Aygïtlï ädim (1940; The Decisive Step) and a later novel, Nebit-Dag (1957), as well as plays, poems, and translations.

Karbala, city, capital of Karbalāʾ muḥāfaẓah (governorate), central Iraq. One of Shiʿi Islam’s foremost holy cities, it lies 55 miles (88 km) southwest of Baghdad, with which it is connected by rail. The city’s religious significance derives from the Battle of Karbala (680 ce), a one-sided contest

Christening Pluto’s Moons: Kerberos: Kerberos is another spelling of the more-familiar Cerberus (that spelling also was already assigned to an asteroid). We would probably agree that either one is much more colourful than "P4," the moon’s provisional name after its discovery in 2011. Kerberos is the dog who…

Crusades: From Constantinople to Antioch: …by a relief force under Kerbogha of Mosul. The situation seemed so hopeless that some Crusaders deserted and attempted to return home. Among these was Peter the Hermit, who was caught and returned to the host, where he was quietly forgiven. Another deserter was the French knight Stephen of Blois,…

valley: Types of valleys: …action such as tropical mountains, Kerbtal (German for “notched valley”) forms occur. These are characterized by steep, knife-edge ridges and valley slopes meeting in a V-shape. Where slopes are steep but a broad valley floor occurs, Sohlenkerbtal (meaning precisely a valley with such characteristics) is the prevailing form. Valleys of…

Kerch, city and seaport, Crimea republic, southern Ukraine, on the western shore of the Strait of Kerch at the head of a small bay. Founded in the 6th century bce by Miletan Greeks, it flourished as a trading center, and in the 5th century it became the capital of the kingdom of the Cimmerian

Kerch, city and seaport, Crimea republic, southern Ukraine, on the western shore of the Strait of Kerch at the head of a small bay. Founded in the 6th century bce by Miletan Greeks, it flourished as a trading center, and in the 5th century it became the capital of the kingdom of the Cimmerian

Crimea: Geography: …(19-km-) long bridge spans the Kerch Strait, linking Crimea and Russia.

Amanda Knox: …brutal murder of her roommate Meredith Kercher in Perugia, Italy, in 2007. Knox’s story became a nearly decade-long media and legal drama that saw Knox and her boyfriend spend almost four years in prison for a crime that Italy’s highest court ultimately ruled they did not commit.

Dallas: ’s chief nemesis—Cliff Barnes (Ken Kercheval).

collective behavior: Hysterical contagion: sociologist Alan C. Kerckhoff and the U.S. psychologist Kurt W. Back found that the crisis came after a period during which the women employees had performed unusual amounts of overtime work. The women who became ill from the mysterious insect bites had generally worked more overtime…

human digestive system: Absorption: These folds, known as plicae circulares, are approximately 5 to 6 cm (2 inches) long and about 3 mm (0.1 inch) thick. Plicae circulares are present throughout the small intestine except in the first portion, or bulb, of the duodenum, which is usually flat and smooth, except for a…

Mount Kenya, volcano, central Kenya, lying immediately south of the Equator. It is the second highest mountain in Africa after Kilimanjaro, which is located some 200 miles (320 km) to the south. The Mount Kenya area was added to UNESCO’s World Heritage List in 1997. The base of the mountain lies at

Genghis Khan: Early struggles: …to Toghril, khan of the Kereit tribe, with whom Yesügei had had the relationship of anda, or sworn brother, and at that time the most powerful Mongol prince, for help in recovering Börte. He had had the foresight to rekindle this friendship by presenting Toghril with a sable skin, which…

Paleo-Siberian languages: Yeniseian, Luorawetlan, and Nivkh: …about 2,000 speakers, and (5) Kerek, with about 10 speakers.

Hendrik Conscience: …first Flemish adventure novel, and De kerels van Vlaanderen (1871; “The Boys of Flanders”), another historical novel. The publication of his 100th book in 1881 led to mass tributes to him in Brussels, and in 1883 the city of Antwerp erected a statue in his honour.

Kerema, minor port on the Gulf of Papua, south-central Papua New Guinea, southwestern Pacific Ocean. Located on Kerema Bay, the town occupies hilly savanna land between the deltas of the Vailala and Lakekamu rivers. Rubber is grown in the surrounding area, and coconuts are raised along the coast

lud: In the keremet of the Mordvins, sacrifices were made both upward to the sun or downward to the night. In groves of deciduous trees the high gods were worshiped, whereas the lower spirits lived in the fir groves. In the Cheremis keremet only the native language could…

June Offensive, (June [July, New Style], 1917), unsuccessful military operation of World War I, planned by the Russian minister of war Aleksandr Kerensky. The operation not only demonstrated the degree to which the Russian army had disintegrated but also the extent of the Provisional Government’s

Aleksandr Kerensky was a moderate socialist revolutionary who served as head of the Russian provisional government from July to October 1917 (Old Style). (Read Leon Trotsky’s 1926 Britannica essay on Lenin.) While studying law at the University of St. Petersburg, Kerensky was attracted to the

Aleksandr Kerensky was a moderate socialist revolutionary who served as head of the Russian provisional government from July to October 1917 (Old Style). (Read Leon Trotsky’s 1926 Britannica essay on Lenin.) While studying law at the University of St. Petersburg, Kerensky was attracted to the

Károly Kerényi was a Hungarian classical philologist and authority in comparative religions, who pioneered research in ancient cultures and formulated a theory of the “Humanism of integral man.” A professor of classical studies (Pécs, Szeged) and visiting professor of Hungarian language (Basel),

Angel Falls, waterfall in the Guiana Highlands in Bolívar state, southeastern Venezuela, on the Churún River, a tributary of the Caroní, 160 miles (260 km) southeast of Ciudad Bolívar. The highest waterfall in the world, the cataract drops 3,212 feet (979 metres) and is 500 feet (150 metres) wide

Ker, in ancient Greek religion, a destructive spirit. Popular belief attributed death and illness to the action of impersonal powers, often spoken of in the plural (Keres). The word was also used of an individual’s doom, with a meaning resembling the notion of destiny, as when Zeus weighs the Keres

Paul Keres was an Estonian chess grandmaster, three times chess champion of the U.S.S.R., three times European champion, and a member of the winning Soviet team at seven world Chess Olympiads. (Read Garry Kasparov’s Britannica essay on chess & Deep Blue.) Keres began to learn chess at the age of 4