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perpetual-motion machine

(Encyclopedia)perpetual-motion machine, device that would be able to operate continuously and supply useful work, in violation of the laws of thermodynamics. A machine that would produce more energy in the form of ...

environmentalism

(Encyclopedia)environmentalism, movement to protect the quality and continuity of life through conservation of natural resources, prevention of pollution, and control of land use. The philosophical foundations for ...

Lyman, Theodore

(Encyclopedia)Lyman, Theodore, 1833–97, American naturalist, b. Waltham, Mass., grad. Harvard, 1855, and Lawrence Scientific School, Harvard, 1858. He was in the Union army as an aide (1863–65) on the staff of ...

Little Sioux

(Encyclopedia)Little Sioux so͞o [key], river, 221 mi (356 km) long, rising in SW Minn. and flowing generally SW across NW Iowa to the Missouri River S of Sioux City. Flowing through a rich agricultural area in the...

Lancaster Sound

(Encyclopedia)Lancaster Sound, arm of Baffin Bay, c.200 mi (320 km) long and 40 mi (60 km) wide, Nunavut Territory, Canada. It extends west between Devon and Baffin islands and is part of the shortest water route ...

Ismail, sultan of Morocco

(Encyclopedia)Ismail, 1646?–1727, sultan of Morocco (1672–1727). He organized corps of Sudanese to subdue the revolts that followed his accession. He attacked Christian strongholds in Morocco, regaining Larache...

Kaneohe Bay

(Encyclopedia)Kaneohe Bay, Hawaii, on the east coast of Oahu, protected by coral reefs and dotted with islands. The shores of the bay are rimmed with ancient fishponds built by the Hawaiian chiefs. A U.S. marine co...

Warren, Gouverneur Kemble

(Encyclopedia)Warren, Gouverneur Kemble gəvərnērˈ [key], 1830–82, Union general in the American Civil War, b. Cold Spring, N.Y. An army engineer, he assisted in the survey of the Mississippi delta and also en...

Gibson, Paris

(Encyclopedia)Gibson, Paris, 1830–1920, American pioneer and politician, b. Brownfield, Maine. After serving in the Maine legislature he moved to Minneapolis, where he built the first flour mill and started woole...

Namib-Naukluft National Park

(Encyclopedia)Namib-Naukluft National Park, 19,216 sq mi (49,768 sq km), W Namibia, encompassing parts of the Namib Desert and the Naukluft mountain range. It was established in 1979 when the Namib Desert Park (beg...