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Ruska, Ernst

(Encyclopedia)Ruska, Ernst, 1906–88, German electrical engineer. By applying the discovery that electron waves are 100,000 times shorter than those of light, Ruska built a microscope that used a beam of electrons...

Ukrainka, Lesia

(Encyclopedia)Ukrainka, Lesia lāsˈyə o͝okrīnˈkə [key], 1871–1913, Ukrainian poet and dramatist, whose original name was Larysa Kvitka-Kosach. Ukrainka spent most of her life abroad fighting to recuperate f...

biogenetic law

(Encyclopedia)biogenetic law, in biology, a law stating that the earlier stages of embryos of species advanced in the evolutionary process, such as humans, resemble the embryos of ancestral species, such as fish. T...

raven

(Encyclopedia)raven, common name for the largest members of the family Corvidae (crow family), ranging throughout the arctic and temperate regions of the Northern Hemisphere. The common raven, Corvus corax, is a gl...

minnesinger

(Encyclopedia)minnesinger mĭnˈĭsĭngˌər [key], a medieval German knight, poet, and singer of Minne, or courtly love. Originally imitators of Provençal troubadours, minnesingers developed their own style in th...

Bernadotte, Count Folke

(Encyclopedia)Bernadotte, Count Folke fôlˈkə bĕrnädôtˈ, bûrˈnədŏt [key], 1895–1948, Swedish internationalist; nephew of King Gustavus V. He was active in the Swedish Red Cross and became its president ...

Greenberg, Clement

(Encyclopedia)Greenberg, Clement, 1909–94, American art critic, b. New York City. Greenberg's criticism was primarily concerned with art produced after abstract expressionism. This art, now known as color-field p...

Keller, Gottfried

(Encyclopedia)Keller, Gottfried gôtˈfrēt [key], 1819–90, Swiss novelist, poet, and short-story writer. His vital, realistic, and purposeful fiction gives him a high place among 19th-century authors. Chief amon...

Pevsner, Sir Nikolaus

(Encyclopedia)Pevsner, Sir Nikolaus pĕvzˈnər [key], 1902–83, English architectural historian, b. Germany. Influenced by Heinrich Wölfflin, Pevsner contended in his many works that art must be considered withi...

Richter, Sviatoslav

(Encyclopedia)Richter, Sviatoslav rĭkhˈtər [key], 1915–97, Russian pianist, b. Ukraine. He studied at the Moscow Conservatory under Heinrich Neuhaus. After earning an impressive critical reputation, he was aw...