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ozone layer
(Encyclopedia)ozone layer or ozonosphere, region of the stratosphere containing relatively high concentrations of ozone, located at altitudes of 12–30 mi (19–48 km) above the earth's surface. Ozone in the ozone...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...toothfish
(Encyclopedia)toothfish, common name for a genus (Dissostichus) of deep-water marine ray-finned fishes found in waters off S South America to Antarctica. The Patagonian toothfish, D. eleginoides, is the northerly o...Cenozoic era
(Encyclopedia)Cenozoic era sēnəzōˈĭk, sĕn– [key], last major division of geologic time (see Geologic Timescale, tablegeologic timescale, table) lasting from 65 million years ago to the present. The Cenozoic...magnetic pole
(Encyclopedia)magnetic pole, the two roughly opposite ends of the planet where the earth's magnetic intensity is the greatest, as the north and south magnetic poles. For the magnetic north, it is the direction from...Lombok
(Encyclopedia)Lombok lŏmbŏkˈ [key], island (1990 pop. 2,403,025), c.1,825 sq mi (4,725 sq km), E Indonesia, one of the Lesser Sundas, separated from Bali by the Strait of Lombok. Mataram, with the port of Ampena...snowball earth
(Encyclopedia)snowball earth, hypothesized condition in which the earth was covered completely by ice during several periods in the Proterozoic. The hypothesis was originally developed to explain evidence of the co...Royal, Ségolène
(Encyclopedia)Royal, Ségolène (Marie-Ségolène Royal) märēˈ-sāgōlĕnˈ rwäyälˈ [key], 1953–, French politician, b. Dakar, Senegal. A graduate of the École Nationale d'Administration (1980) who worked ...Cook, Frederick Albert
(Encyclopedia)Cook, Frederick Albert, 1865–1940, American explorer and physician, b. Sullivan co., N.Y. Cook early became interested in the arctic and accompanied the expedition of Robert E. Peary in 1891–92 as...Matthiessen, Peter
(Encyclopedia)Matthiessen, Peter măthˈəsən [key], American writer, naturalist, and adventurer, b. New York City, grad. Yale (1950). A founder (1951) of the literary Paris Review, he published his first novel, R...Browse by Subject
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