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chalk

(Encyclopedia)chalk, mineral of calcium carbonate, similar in composition to limestone, but softer. It is characteristically a marine formation and sometimes occurs in great thickness; the chief constituents of the...

goby

(Encyclopedia)goby, common name for a member of the family Gobiidae, small marine fishes familiar in shallow waters, especially along southern shores. Gobies may be either scaled or scaleless; all species have the ...

feather star

(Encyclopedia)feather star, common name of a class of echinoderms that, as juveniles, are attached to the sea bottom by a stalk with rootlike branches; the mouth side faces upward. In the adult stage they break awa...

Posse Comitatus Act

(Encyclopedia)Posse Comitatus Act, 1878, U.S. federal law that makes it a crime to use the military as a domestic police force in the United States under most circumstances. The law was designed to end the use of f...

Baker Island

(Encyclopedia)Baker Island, uninhabited island, 1 sq mi (2.6 sq km), central Pacific, near the equator, c.1,650 mi (2,660 km) SW of Honolulu. The arid coral island was discovered in 1832 by Capt. Michael Baker, an ...

Odum, Eugene Pleasants

(Encyclopedia)Odum, Eugene Pleasants, 1913–2002, American ecologist, b. Newport, N.H., Ph.D. Univ. of Illinois, 1939; son of Howard W. Odum. He joined the department of zoology at the Univ. of Georgia in 1940, ev...

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...

Wilhelmshaven

(Encyclopedia)Wilhelmshaven vĭlˌhĕlms-häˈfən [key], city (1994 pop. 91,680), Lower Saxony, NW Germany, on Jade Bay, an inlet of the North Sea. It is a major oil port and an industrial center. Manufactures inc...

Aden, Gulf of

(Encyclopedia)Aden, Gulf of äˈdən, āˈ– [key], western arm of the Arabian Sea, 550 mi (885 km) long, lying between Yemen and Somalia; connected with the Red Sea by the Bab el Mandeb. The gulf is on the great ...

Wake Island

(Encyclopedia)Wake Island, atoll with three islets (Wake, Wilkes, and Peale), 3 sq mi (7.8 sq km), central Pacific, between Hawaii and Guam. It is a U.S. military base and scientific research center under the juris...