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Arctic, the

(Encyclopedia)CE5 Arctic, the northernmost area of the earth, centered on the North Pole. The arctic regions are not coextensive with the area enclosed by the Arctic Circle (lat. 66°30′N) but are usually defi...

Ross, Sir James Clark

(Encyclopedia)Ross, Sir James Clark, 1800–1862, British polar explorer and rear admiral. In 1818 he accompanied his uncle, Sir John Ross, in search of the Northwest Passage and commanded the Erebus. He later stud...

continental drift

(Encyclopedia)CE5 Continental drift (arrows indicate the directions of motion of the landmasses) A. Proposed reconstruction of the supercontinent Pangaea indicating the major present landmasses B. Proposed recon...

Shackleton, Sir Ernest Henry

(Encyclopedia)Shackleton, Sir Ernest Henry, 1874–1922, British antarctic explorer, b. Ireland. The first of his voyages to Antarctica was made as a member of the expedition (1901–4) of Robert F. Scott. Shacklet...

Crux

(Encyclopedia)Crux kro͝oks [key] [Lat.,=cross], small but brilliant southern constellation whose four most prominent members form a Latin cross, the famous Southern Cross. The long arm of the cross, terminating in...

Hillary, Sir Edmund Percival

(Encyclopedia)Hillary, Sir Edmund Percival, 1919–2008, New Zealand mountain climber and explorer. He went on many mountain-climbing expeditions before 1953, when he and Tenzing Norgay of Nepal were the first peop...

Simnel, Lambert

(Encyclopedia)Simnel, Lambert sĭmˈnəl [key], c.1475–1525, imposter and pretender to the English throne. Little is known of his early life, but before 1486 he caught the attention of an Oxford priest, Richard S...

Mexico, country, North America

(Encyclopedia)CE5 Mexico both: māˈhēkō [key], officially United Mexican States, republic (2015 est. pop. 125,891,000), 753,665 sq mi (1,952,500 sq km), S North America. It borders on the United States in the...

Great Lakes, North America

(Encyclopedia)Great Lakes, group of five freshwater lakes, central North America, creating a natural border between the United States and Canada and forming the largest body of freshwater in the world, with a combi...

North Africa, campaigns in

(Encyclopedia)North Africa, campaigns in, series of military contests for control of North Africa during World War II. The desert war started in 1940 and for more than two years thereafter seesawed between NE Libya...