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W and Z particles

(Encyclopedia)W and Z particles, elementary particles that mediate, or carry, the fundamental force associated with weak interactions. The discovery of the W and Z particles at CERN near Geneva, Switzerland, in the...

Freeman, Orville Lothrop

(Encyclopedia)Freeman, Orville Lothrop, 1918–2003, American political figure, b. Minneapolis. In World War II he served in the U.S. marine corps, was severely wounded, and was discharged with the rank of major in...

Pueblo, indigenous people of North America

(Encyclopedia)Pueblo, name given by the Spanish to the sedentary Native Americans who lived in stone or adobe communal houses in what is now the SW United States. The term pueblo is also used for the villages occup...

Colorado, rivers, United States and Mexico

(Encyclopedia)Colorado [1] kŏlərădˈə, –rădˈō, –räˈdō [2] kŏlərāˈdə, –räˈdə [key]. 1 Great river of the SW United States, 1,450 mi (2,334 km) long, rising in the Rocky Mts. of N Colo., and f...

age grade and age set

(Encyclopedia)age grade and age set, differentiation of social role based on age, commonly found in small-scale societies of North America and East Africa. Age sets are a type of sodality (nonresidential groups tha...

Fraser, Malcolm

(Encyclopedia)Fraser, Malcolm (John Malcolm Fraser), 1930–2015, Australian political leader and prime minister (1975–83). A graduate of Oxford (1952), he entered the Australian parliament as a Liberal member in...

Madeira, river, Bolivia and Brazil

(Encyclopedia)Madeira mədāˈrə [key], river, c.2,100 mi (3,380 km) long, formed by the junction of the Beni and Mamoré rivers on the Bolivia-Brazil border. It flows north along the border for c.60 mi (100 km), ...

Davies, Emily

(Encyclopedia)Davies, Emily (Sarah Emily Davies) dāˈvĭs [key], 1830–1921, British feminist, co-founder of Girton College, Cambridge. Educated at home, she became (1862) secretary of a committee to obtain the a...

National Aeronautics and Space Administration

(Encyclopedia)National Aeronautics and Space Administration (NASA), civilian agency of the U.S. federal government with the mission of conducting research and developing operational programs in the areas of space e...

Arequipa

(Encyclopedia)Arequipa ärākēˈpä [key], city (2020 pop. 923,000), alt. c.7,550 ft (2,300 m), capital of Arequipa dept., S Peru, on the Chili River. One of Peru's largest cities, it ...