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Rio Grande, river, United States and Mexico

(Encyclopedia)Rio Grande rēˈō grănd, rēˈō gränˈdē [key], river, c.1,885 mi (3,000 km) long, rising in SW Colo. in the San Juan Mts. and flowing south through the middle of N.Mex., past Albuquerque, then c...

belligerency

(Encyclopedia)belligerency bəlĭjˈərənsē [key], in international law, status of parties legally at war. Belligerency exists in a war between nations or in a civil war if the established government treats the i...

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. ...

Versailles, Treaty of

(Encyclopedia)Versailles, Treaty of, any of several treaties signed in the palace of Versailles, France. For the Treaty of Versailles of 1783, which ended the American Revolution, see Paris, Treaty of, 1783. The...

Evangelical United Brethren Church

(Encyclopedia)Evangelical United Brethren Church, Protestant denomination created (1946) by the union of the Evangelical Church and the United Brethren in Christ. Both denominations originated early in the 19th cen...

war

(Encyclopedia)war, armed conflict between states or nations (international war) or between factions within a state (civil war), prosecuted by force and having the purpose of compelling the defeated side to do the w...

DDT

(Encyclopedia)DDT or 2,2-bis(p-chlorophenyl)-1,1,1,-trichloroethane, chlorinated hydrocarbon compound used as an insecticide. First introduced during the 1940s, it killed insects that spread disease and fed on crop...

sociobiology

(Encyclopedia)sociobiology, controversial field that studies how natural selection, previously used only to explain the evolution of physical characteristics, shapes behavior in animals and humans. The theory has c...

boat people

(Encyclopedia)boat people, term used to describe the Indochinese refugees who fled Communist rule after the Vietnam War (1975) in small boats and the many ethnic Chinese who left Vietnam similarly after China's inv...

Hammarskjöld, Dag

(Encyclopedia)Hammarskjöld, Dag däg hämˈərshōldˌ, Swed. hämˈärshöldˈ [key], 1905–61, Swedish statesman, secretary-general of the United Nations (1953–61). He attended the universities of Uppsala and...