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Kitt Peak National Observatory

(Encyclopedia)Kitt Peak National Observatory, astronomical observatory located southwest of Tucson, Ariz.; it was founded in 1958 under contract with the National Science Foundation and is administered by the Assoc...

Petrified Forest National Park

(Encyclopedia)Petrified Forest National Park, 93,533 acres (37,881 hectares), E Ariz.; est. as a national monument 1906, designated a national park 1962. A part of the Painted Desert, it contains the largest known ...

Grand Teton National Park

(Encyclopedia)Grand Teton National Park tētŏnˈ, tēˈtŏn [key], 309,993 acres (125,503 hectares), NW Wyo.; est. 1929. The park, which includes Jackson Lake and part of Jackson Hole, embraces the most scenic por...

gross national product

(Encyclopedia)gross national product (GNP), in economics, a quantitative measure of a nation's total economic activity, generally assessed yearly or quarterly. In estimating the GNP, only the final value of a produ...

Serengeti National Park

(Encyclopedia)Serengeti National Park, c.5,700 sq mi (14,800 sq km), NE Tanzania, est. 1941. The internationally famous park attracts large numbers of tourists to see the world's largest concentrations of wildebees...

Moores Creek National Battlefield

(Encyclopedia)Moores Creek National Battlefield, 88 acres (36 hectares), SE N.C.; est. 1926. The patriot victory over the Loyalists at Moores Creek Bridge on Feb. 27, 1776, prevented the intended British invasion o...

National Institutes of Health

(Encyclopedia)National Institutes of Health (NIH), agency of the U.S. Public Health Service, with headquarters in Bethesda, Md. It was established initially in 1887 as a laboratory in the U.S. Marine Hospital on St...

Mount McKinley National Park

(Encyclopedia)Mount McKinley National Park: see Denali National Park and Preserve. ...

Devils Tower National Monument

(Encyclopedia)Devils Tower National Monument, 1,347 acres (546 hectares), overlooking the Belle Fourche River, NE Wyo.; it was the first designated U.S. national monument (1906). Devils Tower, 865 ft (264 m) high a...

Virgin Islands National Park

(Encyclopedia)Virgin Islands National Park, 14,689 acres (5,949 hectares), St. John, Virgin Islands; est. 1956. The park, with beaches, coves, and headlands, is rich in tropical-plant, animal, and marine life. Bord...