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bighorn, in zoology

(Encyclopedia)bighorn or Rocky Mountain sheep, wild sheep, Ovis canadensis, of W North America, formerly plentiful in mountains from SW Canada to N Mexico. Indiscriminate hunting, disease, and scarcity of food enor...

Mercator, Gerardus

(Encyclopedia)Mercator, Gerardus gārˈhärt krāˈmər [key], 1512–94, Flemish geographer, mathematician, and cartographer. He studied in Louvain, where he had a geographical establishment (1534). From 1537 to 1...

American Geographical Society

(Encyclopedia)American Geographical Society (AGS), oldest geographical society in the United States, founded 1852 in New York City. Its purpose is to advance the science of geography through discussion and publicat...

Roanne

(Encyclopedia)Roanne rôänˈ [key], town (1990 pop. 42,848), Loire dept., E central France, on the Loire River. Cotton and metals are the chief products; other industries include tanning, machine and vehicle manuf...

Anville, Jean Baptiste Bourguignon d'

(Encyclopedia)Anville, Jean Baptiste Bourguignon d' zhäN bätēstˈ bo͞orgēnyôNˈ däNvēlˈ [key], 1697–1782, French geographer and cartographer. His maps of ancient geography, characterized by careful, accu...

global warming

(Encyclopedia)global warming, the gradual increase of the temperature of the earth's lower atmosphere as a result of the increase in greenhouse gases since the Industrial Revolution. Global warming and its effects,...

Drygalski, Erich von

(Encyclopedia)Drygalski, Erich von āˈrĭkh fən drēgälˈskē [key], 1865–1949, German polar explorer. A professor of geography at the Univ. of Munich, he led an expedition that wintered (1892–93) in W Green...

Schimper, Karl Friedric

(Encyclopedia)Schimper, Karl Friedric shĭmˈpər [key], 1803–67, German botanist. He did important work in plant morphology and originated the theory, called phyllotaxis, that there is a fixed order to the arran...

Burritt, Elihu

(Encyclopedia)Burritt, Elihu, 1810–79, American reformer, b. New Britain, Conn. A blacksmith, he studied mathematics, languages, and geography and became known as “the learned blacksmith.” Profoundly idealist...

Harz

(Encyclopedia)Harz härts [key], mountain range, northern Germany, extending c.60 mi (100 km) between the Elbe and Leine rivers. The rugged mountains were once densely forested. They culminate in Brocken peak (3,74...