Theopompus of Chios: …were chiefly historical, included the Hellenica, which treated the history of Greece, in 12 books, from 411 (where Thucydides breaks off) to 394—the date of the Battle of Cnidus and the end of Spartan hegemony. Of this work only a few fragments survive. A far more elaborate work was the…

Xenophon: Historical themes of Xenophon: Hellenica is a seven-book account of 411–362 in two distinct (perhaps chronologically widely separated) sections: the first (Book I and Book II through chapter 3, line 10) “completes” Thucydides (in largely un-Thucydidean fashion) by covering the last years of the Peloponnesian War (i.e., 411–404); the…

Hellenistic age, in the eastern Mediterranean and Middle East, the period between the death of Alexander the Great in 323 bce and the conquest of Egypt by Rome in 30 bce. For some purposes the period is extended for a further three and a half centuries, to the move by Constantine the Great of his

Hellenistic age, in the eastern Mediterranean and Middle East, the period between the death of Alexander the Great in 323 bce and the conquest of Egypt by Rome in 30 bce. For some purposes the period is extended for a further three and a half centuries, to the move by Constantine the Great of his

Koine, the fairly uniform Hellenistic Greek spoken and written from the 4th century bc until the time of the Byzantine emperor Justinian (mid-6th century ad) in Greece, Macedonia, and the parts of Africa and the Middle East that had come under the influence or control of Greeks or of Hellenized

Judaism: Hellenistic Judaism (4th century bce–2nd century ce): Contact between Greeks and Semites goes back to Minoan and Mycenaean times and is reflected in certain terms used by

Hellenistic religion, any of the various systems of beliefs and practices of eastern Mediterranean peoples from 300 bc to ad 300. The period of Hellenistic influence, when taken as a whole, constitutes one of the most creative periods in the history of religions. It was a time of spiritual

Hellenistic romance, adventure tale, usually with a quasi-historical setting, in which a virtuous heroine and her valiant lover are separated by a series of misadventures (e.g., jealous quarrels, kidnapping, shipwrecks, or bandits) but are eventually reunited and live happily together. Five

theatre: Visual and spatial aspects: The great Hellenistic theatre at Epidaurus had what is believed to have been a high, two-level stagehouse.

Judaism: Hellenistic Judaism (4th century bce–2nd century ce): Contact between Greeks and Semites goes back to Minoan and Mycenaean times and is reflected in certain terms used by

hellēnotamiai, financial officers of the Delian League (478–404 bce) and instruments of Athenian control over league affairs. The hellēnotamiai, all Athenians, were elected annually and put in charge of the funds contributed by the various allied cities. Originally their headquarters were at Delos,

Franz Hellens was a Belgian writer who produced more than 120 works, including novels, plays, criticism, and volumes of poetry and short stories. He also played an important role in Belgian-French literary life between 1920 and 1955 as editor of several progressive magazines and is notable as a

Matthias Grünewald: …from the Frankfurt merchant Jacob Heller to add two fixed wings to the altarpiece of the Assumption of the Virgin recently completed by the painter Albrecht Dürer. These wings depicting four saints are painted in grisaille (shades of gray) and already show the artist at the height of his powers.…

childhood disintegrative disorder (CDD), a rare neurobiological disorder characterized by the deterioration of language and social skills and by the loss of intellectual functioning following normal development throughout at least the initial two years of life. The disorder was first described in

Dean Heller is an American Republican politician who was appointed to the U.S. Senate in 2011 and began representing Nevada the following year. He was elected to the body later in 2012 and served until 2019. Although he was born in Castro Valley, California, Heller grew up in Carson City, Nevada.

Dean Heller is an American Republican politician who was appointed to the U.S. Senate in 2011 and began representing Nevada the following year. He was elected to the body later in 2012 and served until 2019. Although he was born in Castro Valley, California, Heller grew up in Carson City, Nevada.

Hermann Heller was a German political scientist who was responsible for the revival of political theory in Germany. Heller taught at the universities of Kiel, Leipzig, Berlin, and Frankfurt and left Germany in 1933 after the advent to power of the National Socialist Party of Adolf Hitler. An

Joseph Heller was an American writer whose novel Catch-22 (1961) was one of the most significant works of protest literature to appear after World War II. The satirical novel was a popular success, and a film version appeared in 1970. (Read Britannica’s essay “War Stories: 13 Modern Writers Who

What Ever Happened to Baby Jane?: Production notes and credits:

Michał Heller is a Roman Catholic priest and mathematical cosmologist who championed a worldview that combined mathematical physics, theology, and philosophy. Heller was born in southern Poland. When he was four years old, his father helped to sabotage the chemical plant in which he worked, and the

Michał Heller is a Roman Catholic priest and mathematical cosmologist who championed a worldview that combined mathematical physics, theology, and philosophy. Heller was born in southern Poland. When he was four years old, his father helped to sabotage the chemical plant in which he worked, and the

Robert Heller was a British-born magician who popularized conjuring in the United States. Trained as a musician, Heller turned to magic after he saw a performance by the French magician Robert-Houdin in 1848. Heller settled in the United States, where he found success as a magician in the 1860s. At

revenue sharing: Economist Walter Heller is credited with originating the revenue-sharing program, which U.S. President Richard M. Nixon signed into law in October 1972. During the 14 years of the program’s operation administrative costs were extremely low, and a total of $85 billion reached America’s communities.

Yom Ṭov Lipmann ben Nathan ha-Levi Heller was a Bohemian Jewish rabbi and scholar who is best known for his commentary on the Mishna. His works also indicate that he had extensive knowledge of mathematics, the sciences, and other secular subjects. Raised by his grandfather Moses Wallerstein, a

Pete Seeger: The Weavers: Lee Hays, Ronnie Gilbert, and Fred Hellerman—which achieved considerable success on college campuses, in concert, and on several records. Shortly after the group achieved national fame, however, a great deal of controversy was stirred up concerning Seeger’s previous activities in left-wing and labor politics, and the Weavers suddenly found themselves…

Dardanelles, narrow strait in northwestern Turkey, 38 miles (61 km) long and 0.75 to 4 miles (1.2 to 6.5 km) wide, linking the Aegean Sea with the Sea of Marmara. The city of Dardanus in the Troad (territory around ancient Troy), where Mithradates VI (king of Pontus) and Sulla (the Roman general)

rocket and missile system: Semiactive: Hellfire antitank missile, for example, used laser designation by an air or ground observer who could be situated many miles from the launching helicopter.

Burma Railway: Construction of the railway: …railway became known as “Hellfire Pass” because of the harsh and extremely difficult working conditions. Much of the excavation was carried out with inadequate hand tools, and, because work on the railway had fallen behind schedule, the pace of work was increased. Prisoners were made to work around the…

Missoula, city, seat (1866) of Missoula county, western Montana, U.S. It is situated on Clark Fork of the Columbia River, at the mouth of the Bitterroot River, near the Bitterroot Range in a broad valley (elevation 3,223 feet [982 metres]). The first white settler in the area was Father Pierre-Jean

dobsonfly: The larvae, sometimes known as hellgrammites or toe-biters, are aquatic and are eaten by fish, especially bass; they often are used as fish bait by anglers. Mature larvae migrate from their freshwater habitat to wet soil, moss, or decaying vegetation near the water to form pupal cells from which adults…

hellhound, a dog represented in mythology (such as that of ancient Greece and Scandinavia) as standing guard in the underworld. In Greek mythology this was Cerberus, a three-headed, dragon-tailed

Olaf II Haraldsson ; feast day July 29) was the first effective king of all Norway and the country’s patron saint, who achieved a 12-year respite from Danish domination and extensively increased the acceptance of Christianity. His religious code of 1024 is considered to represent Norway’s first

Hellín, city, Albacete provincia (province), in the comunidad autónoma (autonomous community) of Castile–La Mancha, southeastern Spain. The city’s Spanish name derives from Ilunum, the name given to the city by the ancient Romans. Served by a hydroelectric plant on the Mundo River, Hellín’s

Lillian Hellman was an American playwright and motion-picture screenwriter whose dramas forcefully attacked injustice, exploitation, and selfishness. Hellman attended New York public schools and New York University and Columbia University. Her marriage (1925–32) to the playwright Arthur Kober ended

cryptology: Public-key cryptography: … and Stanford University electrical engineer Martin Hellman realized that the key distribution problem could be almost completely solved if a cryptosystem, T (and perhaps an inverse system, T′), could be devised that used two keys and satisfied the following conditions:

multiple setting: …ingenious mansion was usually the hellmouth, a booth in the shape of a monster’s jaws, from which smoke and fireworks issued and actors dressed as devils appeared.

Minoru Yamasaki: …to become a partner with George Hellmuth and Joseph Leinweber. Yamasaki designed the Lambert–St. Louis Municipal Airport terminal in Missouri, which was notable for its impressive use of concrete vaults and which strongly influenced subsequent American air-terminal design. In 1955, the year in which Hellmuth left the partnership, Yamasaki was…

Lionel Richie: …the lyrical love songs “Hello” (1984) and “Say You, Say Me” (1985)—and two more albums: Can’t Slow Down (1983) and Dancing on the Ceiling (1986). Can’t Slow Down not only won a Grammy Award for album of the year but became and long remained one of Motown’s best-selling albums.…

Adele: The yearning single “Hello” became a hit in numerous countries, and more than 20 million copies of the album were sold worldwide. In addition, 25 earned Adele five more Grammys, including another sweep of the top categories (album, song, and record of the year). In 2021 the singer…

Frank Perry: …mystery Compromising Positions (1985) and Hello Again (1987), a reincarnation comedy. Perry’s last film was the autobiographical documentary On the Bridge (1992), which depicted his battle against prostate cancer.

Hello Kitty, cartoon character whose likeness adorns hundreds of products for children and adults throughout the world. Created in 1974 by the Japanese merchandising company Sanrio and known internationally as Hello Kitty, Kitty White is a small, round-faced, cartoon catlike girl with black eyes, a

Gene Pitney: …with hits such as “Hello Mary Lou” (recorded by Rick Nelson in 1961) and “He’s a Rebel” (recorded by the Crystals in 1962).

Dance of the Hours: …melody for his song “Hello Muddah, Hello Fadduh” (1963), an amusing take on the American tradition of sending children to summer camp. Despite the tune’s wide recognition, however, few listeners can identify Dance of the Hours by title or composer.

Beastie Boys: …electronic turn on the Grammy-winning Hello Nasty (1998) and scored another hit with the single “Intergalactic.” In 2001 Grand Royal folded as a result of slow sales and mounting debts, and the Beastie Boys returned to Capitol for the 2004 release To the 5 Boroughs.

Billy Crudup: Hello Tomorrow! and marriage to Naomi Watts: …starred in the streaming series Hello Tomorrow! (2023) as a slick salesman who markets time-shares on the Moon. Crudup told The New York Times that the character reminded him of his father, who died in 2005. In 2023 Crudup married Watts, with whom he had been linked since 2017.

Pearl Bailey: …all-black production of the musical Hello, Dolly!, first on Broadway (1967–69), then on tour in the United States and Canada (1969–71, 1975–76). She made frequent television appearances and hosted her own show, The Pearl Bailey Show (1971).

Gene Kelly: Films of the 1960s and beyond: Hello, Dolly! (1969) was Kelly’s adaptation of the Broadway hit starring Barbra Streisand, Matthau, and Louis Armstrong. The western comedy The Cheyenne Social Club (1970) starred Henry Fonda and James Stewart as two cowboys who unwittingly inherit management of a brothel. Kelly’s final

Harry Warren: … [1935], “You’ll Never Know” from Hello Frisco, Hello [1943], and “On the Atchison, Topeka and the Santa Fe” from The Harvey Girls [1946]). Nevertheless, he amassed a fortune from his Depression-era contracts with major motion-picture studios and from royalty payments.

Jim Morrison: The Lizard King: …My Fire” (1967) and “Hello, I Love You” (1968), and critically acclaimed albums such as The Doors (1967) and L.A. Woman (1971). The dark-edged eroticism of Morrison’s baritone voice and poetic lyrics helped make the band one of rock music’s most potent, controversial, and theatrical acts.

Sally Field: …Amazing Spider-Man 2 (2014), and Hello, My Name Is Doris (2015). In the sports comedy 80 for Brady (2023), she costarred with Jane Fonda, Rita Moreno, and Lily Tomlin.

Chelsea Handler: Books and other work: Hello, Privilege. It’s Me, Chelsea (2019) is a documentary that explores the impact of white privilege on culture.

pregnancy: Hypertensive disorders of pregnancy: …condition is known as the HELLP syndrome and is denoted by hemolysis, elevated liver enzymes, and low platelet count. In this situation, delivery of the fetus must be induced, or pregnancy must be immediately terminated.

Hells Angels, club for motorcyclists that was founded in California in 1948 and is probably the best known of the so-called “outlaw motorcycle gangs.” The club, which is international, has been accused of criminal activity by law enforcement officials. Most Hells Angels members are white males who

Hells Angels, club for motorcyclists that was founded in California in 1948 and is probably the best known of the so-called “outlaw motorcycle gangs.” The club, which is international, has been accused of criminal activity by law enforcement officials. Most Hells Angels members are white males who

Hells Angels, club for motorcyclists that was founded in California in 1948 and is probably the best known of the so-called “outlaw motorcycle gangs.” The club, which is international, has been accused of criminal activity by law enforcement officials. Most Hells Angels members are white males who

Hells Canyon, deep gorge of the Snake River in the northwestern United States. It forms part of the boundary between Idaho and Oregon and separates the Seven Devils (Idaho) and Wallowa (Oregon) mountain ranges. The canyon has a total length of 125 miles (201 km), along 40 miles (64 km) of which it

Hells Canyon: Hells Canyon National Recreation Area was established in the gorge and surrounding region in 1975. Situated primarily in Wallowa-Whitman National Forest in Oregon but also in Nezperce and Payette national forests in Idaho, it has an area of some 1,020 square miles (2,640 square km).…

children’s literature: National and modern literature: …detective series; the outstanding poet Lennart Hellsing, with Daniel Doppsko (1959); Astrid Lindgren, successful in a half dozen genres but perhaps best known as the creator of the supergirl Pippi Longstocking; Gösta Knutsson, with her well-liked Pelle svanslös (1939; Eng. trans., The Adventures of the Cat Who Had No Tail).…

Gustaf Hellström was a Swedish realist novelist, journalist, and literary critic. As foreign correspondent for several Scandinavian newspapers, Hellstrom lived in Paris, London, and New York City (1907–35), and these cities form the background for much of his early fiction. His critical studies

Gustaf Hellström was a Swedish realist novelist, journalist, and literary critic. As foreign correspondent for several Scandinavian newspapers, Hellstrom lived in Paris, London, and New York City (1907–35), and these cities form the background for much of his early fiction. His critical studies

Hellweg, plateau and historic corridor in North Rhine-Westphalia Land (state), western Germany. It extends east–west from Duisburg to Paderborn, parallel to the northern edge of the Sauerland, and is bounded by the Ruhr (south) and Lippe (north) rivers. The region centres on and is named for an

combinatorics: Helly’s theorem: In 1912 Austrian mathematician Eduard Helly proved the following theorem, which has since found applications in many areas of geometry and analysis and has led to numerous generalizations, extensions and analogues known as Helly-type theorems. If K1, K2, · · ·, Kn are…

rudder: …by a handle termed a tiller or helm. In larger vessels, the rudder is turned by hydraulic, steam, or electrical machinery.

coin: Gold coinage: …fine gold series—florin, leopard, and helm ( 1 2 and 1 4 florin)—but his attempt to introduce a gold currency failed. A gold coinage was finally established in currency in 1351 with a noble of 120 grains of gold and its subdivisions, the half- and quarter-noble. In the same year,…

helmet: …of metal increased until entire helmets were fashioned of iron, still following the same form. About the year 1200 the helm, or heaume, emerged. It was a flat-topped cylinder that was put on over the skullcap just before an engagement; experience soon dictated rounded contours that would cause blows to…

Bob Dylan: Dylan goes electric: …guitarist Robbie Robertson and drummer Levon Helm). Dylan and the band were booed throughout the performance; incongruously, the audience sang along with “Like a Rolling Stone,” the number two song in the United States that week, and then booed at its conclusion.

Bob Dylan: Dylan goes electric: …guitarist Robbie Robertson and drummer Levon Helm). Dylan and the band were booed throughout the performance; incongruously, the audience sang along with “Like a Rolling Stone,” the number two song in the United States that week, and then booed at its conclusion.

Matt Helm, fictional character, the intrepid hero of a series of spy novels (1960–83) by American writer Donald Hamilton. Employed by a secret military organization during World War II, Helm is called upon to spy, to kill, and to convey military secrets. The character was portrayed by Dean Martin

Helmand River, river in southwestern Afghanistan and eastern Iran, about 715 miles (1,150 km) long. Rising in the Bābā Range in east-central Afghanistan, it flows southwestward across more than half the length of Afghanistan before flowing northward for a short distance through Iranian territory

Helmand River: …been extensively developed under the Helmand Valley Authority. A reservoir has been built at Kajakī, 50 miles (80 km) above Gereshk, for irrigation and flood control, and just above the same town a dam diverts water to a canal. Below the reservoir much of the river’s length is tapped for…

Western painting: Germany and Austria: …prepared in the abbey of Helmarshausen on the Weser River. This scriptorium’s masterpiece is a Gospel book presented by Henry and his wife Matilda to Brunswick cathedral in 1173–75. The illumination is extraordinarily rich and dense, with a solemn and magisterial palette of gold, purple, dark green, azure, ochre, and…

Theophilus was a German monk who wrote De diversis artibus (c. 1110–40; also called Schedula diversarum artium), an exhaustive account of the techniques of almost all the known crafts of the first half of the 12th century. From his writings it can be deduced that Theophilus was of the Benedictine

Johannes Gutenberg: Invention of the press: …in what is called the Helmaspergersches Notariatsinstrument (the Helmasperger notarial instrument), dated November 6, 1455, now in the library of the University of Göttingen. Gutenberg was ordered to pay Fust the total sum of the two loans and compound interest (probably totaling 2,020 guilders). Traditional historiography suggested that this settlement…

Meier Helmbrecht: …the poem the young peasant Helmbrecht prefers knightly adventure to farming. His family outfits him at great expense, and he enters the service of a knight (i.e., a robber). He returns home insufferably proud of his stolen riches and his smattering of foreign words and arranges a marriage between his…

Nora Helmer, fictional character, the once-meek wife of lawyer Torvald Helmer, who asserts her independence in Henrik Ibsen’s play A Doll’s House

geoid: Ellipsoidal era: Later workers, particularly Friedrich R. Helmert of Germany, extended the expression to include higher-order terms, and gravimetric methods of determining f continued to be used, along with arc methods, up to the time when Earth-orbiting satellites were employed to make precise measurements (see the table).

helmet, defensive covering for the head, one of the most universal forms of armour. Helmets are usually thought of as military equipment, but they are also worn by firefighters, miners, construction workers, riot police, and motorcyclists, players of several sports, and bicyclists. Military helmets

heraldry: The helmet: On top of the shield is placed the helmet, upon which the crest is fastened by a wreath, coronet, or chapeau. Originally everything in heraldry was strictly utilitarian. As armorial bearings were used with armor, there had to be a helmet. In later centuries…

baseball: Protective gear: The catcher wears a helmet, a barred mask with a hanging throat guard, a padded chest protector, and lightweight guards covering the knees, shins, and ankles. The umpire behind home plate wears a similar chest protector and mask. At bat players wear a lightweight plastic batting helmet that flares…

bird: Importance to man: Guinea fowl (Numida meleagris) from Africa were also widely exported and kept not only for food but also because they are noisy when alarmed, thus warning of the approach of intruders.

helmet shell, any marine snail of the family Cassidae (subclass Prosobranchia, class Gastropoda), characterized by a large, thick shell with a shieldlike inner lip. An example is the 18-centimetre (7-inch) king helmet (Cassis tuberosa) of the Caribbean. Cameos are carved from helmet shells.

helmet-shrike, (family Prionopidae), any of nine species of African songbirds (order Passeriformes) characterized by a forwardly directed crest on the forehead. Several Prionops species, often called red-billed shrikes, were formerly separated in the genus Sigmodus. They are about 20 cm (8 inches)

pottery: Tin-glazed ware: …developed by another glass painter, Abraham Helmhack (1654–1724), who mastered the technique as early as 1690, many years before it was adopted by the factories. The more important studio painters are Johann Aufenwerth and Bartholomäus Seuter of Augsburg, J.F. Metszch of Bayreuth, the Bohemians Daniel and Ignaz Preussler, and Ignaz…

magnetism: Magnetization effects in matter: …a configuration is called a Helmholtz coil. By carefully orienting and adjusting the current in a large Helmholtz coil, it is often possible to cancel an external magnetic field (such as Earth’s magnetic field) in a region of space where experiments require the absence of all external magnetic fields.

free energy: …expressed in two forms: the Helmholtz free energy F, sometimes called the work function, and the Gibbs free energy G. If U is the internal energy of a system, PV the pressure-volume product, and TS the temperature-entropy product (T being the temperature above absolute zero

free energy: …expressed in two forms: the Helmholtz free energy F, sometimes called the work function, and the Gibbs free energy G. If U is the internal energy of a system, PV the pressure-volume product, and TS the temperature-entropy product (T being the temperature above absolute zero

Peter Grünberg: …Solid State Research at the Helmholtz Research Centre in Jülich, Ger.

sound: The Helmholtz resonator: An important type of resonator with very different acoustic characteristics is the Helmholtz resonator, named after the German physicist Hermann von Helmholtz. Essentially a hollow sphere with a short, small-diameter neck, a Helmholtz resonator has a single isolated resonant frequency and no other…

Hermann von Helmholtz was a German scientist and philosopher who made fundamental contributions to physiology, optics, electrodynamics, mathematics, and meteorology. He is best known for his statement of the law of the conservation of energy. He brought to his laboratory research the ability to

Hermann von Helmholtz was a German scientist and philosopher who made fundamental contributions to physiology, optics, electrodynamics, mathematics, and meteorology. He is best known for his statement of the law of the conservation of energy. He brought to his laboratory research the ability to

anthelmintic: Helminths can be divided into three groups: cestodes, or tapeworms; nematodes, or roundworms; and trematodes, or flukes. The helminths differ from other infectious organisms in that they have a complex body structure. They are multicellular and have partial or complete organ

asthma: Asthma on the rise: Further investigation of this “helminthic therapy” in larger sample populations is under way.

gastropod: Classification: Camaenidae) or with (Bradybaenidae, Helminthoglyptidae, and Helicidae) accessory glands on the genitalia; dominant land snails in most regions, including the edible snails of Europe (Helicidae). Assorted

Helminthosporium, genus of fungi in the order Pleosporales (phylum Ascomycota, kingdom Fungi) that exists as asexual anamorphs and causes leaf blight, especially of grasses (e.g., bluegrass, corn, oats), in humid areas. Symptoms include grayish green, tan, or brown elliptical spots that appear on

Ophioglossaceae: Helminthostachys zeylanica in Sri Lanka and regions extending from the Himalayas to Queensland, Australia, has sporangia in small groups on both sides of the fertile spike. Mankyua chejuense is endemic to Cheju Island of South Korea

Helmold Of Bosau was a German historian and priest who wrote Chronica Slavorum (Chronicle of the Slavs). Completed in about 1172, this work was a history of the lower Elbe River region from about 800 to 1170. Educated at Brunswick (1139–42) under Gerold (later bishop of Oldenburg and Lübeck) and at

Helmond, gemeente (municipality), southeastern Netherlands. It lies along the Aa River and the Zuid-Willems Canal east of Eindhoven. Its textile factories and iron foundries have suffered in recent decades, and the town is now dependent on the service sector. A 15th-century castle formerly housed

Jan Baptista van Helmont was a Flemish physician, philosopher, mystic, and chemist who recognized the existence of discrete gases and identified carbon dioxide. Van Helmont was born into a wealthy family of the landed gentry. He studied at Leuven (Louvain), where he finished the course in

Jan Baptista van Helmont was a Flemish physician, philosopher, mystic, and chemist who recognized the existence of discrete gases and identified carbon dioxide. Van Helmont was born into a wealthy family of the landed gentry. He studied at Leuven (Louvain), where he finished the course in