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Tordesillas, Treaty of

(Encyclopedia)Tordesillas, Treaty of tōrˌᵺāsēˈlyäs [key], 1494, agreement signed at Tordesillas, Spain, by which Spain and Portugal divided the non-Christian world into two zones of influence. In principle ...

Angel Falls

(Encyclopedia)Angel Falls, waterfall, Sp. Salto Ángel, 3,212 ft (979 m) high, SE Venezuela, in the Guiana Highlands. Springing from Auyán-Tepuí Mesa, it is the highest uninterrupted waterfall in the world. ...

Reelfoot Lake

(Encyclopedia)Reelfoot Lake, 20 mi (32 km) long, NW Tenn., near the Mississippi River; designated a national natural landmark by the National Park Service. It was formed when a depression created by earthquakes in ...

Sand to Snow National Monument

(Encyclopedia)Sand to Snow National Monument, 154,000 acres (62,000 hectares) in the San Bernadino Mountains, S Calif. It rises from the Sonoran Desert floor to Mount San Gorgonio (11,503 ft/3,506 m), the highest p...

Canyon de Chelly National Monument

(Encyclopedia)Canyon de Chelly National Monument də shāˈ [key] [De Chelly, Sp. corruption of Navajo Tsegi = rock canyon], 83,840 acres (33,955 hectares), NE Ariz.; est. 1931. The area contains the ruins of sever...

National Radio Astronomy Observatory

(Encyclopedia)National Radio Astronomy Observatory (NRAO), federal observatory for radio astronomy, founded in 1956 and operated under contract with the National Science Foundation by Associated Universities, Inc.,...

National Academy of Sciences

(Encyclopedia)National Academy of Sciences, with headquarters in Washington, D.C., a private organization of leading American scientists and engineers devoted to the furtherance of science and its use for the gener...

National Labor Relations Board

(Encyclopedia)National Labor Relations Board (NLRB), independent agency of the U.S. government created under the National Labor Relations Act of 1935 (Wagner Act), and amended by the acts of 1947 (Taft-Hartley Labo...

Vieira, João Bernardo

(Encyclopedia)Vieira, João Bernardo zhwouN bârnärˈdō vēâˈrə [key], 1939–2009, Guinean political leader, president of Guinea-Bissau (1994–99, 2005–9), b. Bissau. He joined the African Party for the In...

National Defense Education Act

(Encyclopedia)National Defense Education Act (NDEA), federal legislation passed in 1958 providing aid to education in the United States at all levels, public and private. NDEA was instituted primarily to stimulate ...