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ethology

(Encyclopedia)ethology, study of animal behavior based on the systematic observation, recording, and analysis of how animals function, with special attention to physiological, ecological, and evolutionary aspects. ...

Jena

(Encyclopedia)Jena yāˈnä [key], city (1994 pop. 100,090), Thuringia, E central Germany, on the Saale River. Manufactures of this industrial center include pharmaceuticals, glass, optical and precision instrument...

Menger, Carl

(Encyclopedia)Menger, Carl kärl mĕngˈər [key], 1840–1921, Austrian economist, a founder of the Austrian school of economics. He was professor of economics at the Univ. of Vienna from 1873 until 1903, when he ...

Karle, Jerome

(Encyclopedia)Karle, Jerome kärl [key], 1918–2013, American physicist, b. New York City, Ph.D. Univ. of Michigan, 1943. He worked on the Manhattan Project before beginning a career (1946–2009) at the U.S. Nava...

Bonhoeffer, Dietrich

(Encyclopedia)Bonhoeffer, Dietrich dēˈtrĭkh bônˈhöfər [key], 1906–45, German Protestant theologian. Bonhoeffer, influenced early by the thinking of the young Karl Barth, urged a conformation to the form of...

tracer

(Encyclopedia)tracer, an identifiable substance used to follow the course of a physical, chemical, or biological process. In chemistry the ideal tracer has the same chemical properties as the molecule it replaces a...

Cleland, Max

(Encyclopedia) Cleland, Max, 1942-2021, American politician, b. Atlanta, GA, as Joseph Maxwell Cleland, Stetson Univ. (B.A., 1964), Emory Univ. (M.A., 1968). Cleland enlisted in the Army in 1965 and served in Vie...

Galton, Sir Francis

(Encyclopedia)Galton, Sir Francis gôlˈtən [key], 1822–1911, English scientist, founder of eugenics; cousin of Charles Darwin. He turned from exploration and meteorology (where he introduced the theory of the a...

Erzberger, Matthias

(Encyclopedia)Erzberger, Matthias mätēˈäs ĕrtsˈbĕrgər [key], 1875–1921, German public official. He was a leader of the left wing of the Catholic Center party in the Reichstag from 1903. Early in World War...

Křenek, Ernst

(Encyclopedia)Křenek, Ernst krĕˈnĕk, Czech kerzhĕˈnĕk [key], 1900–1991, Austrian-American composer, b. Vienna. to Czech parents. He studied in Vienna and Berlin, and in the early 1920s he composed chamber ...