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natural law

(Encyclopedia)natural law, theory that some laws are basic and fundamental to human nature and are discoverable by human reason without reference to specific legislative enactments or judicial decisions. Natural la...

natural gas

(Encyclopedia)natural gas, natural mixture of gaseous hydrocarbons found issuing from the ground or obtained from specially driven wells. The composition of natural gas varies in different localities. Its chief com...

Natural Bridge

(Encyclopedia)Natural Bridge, small village, Rockbridge co., W Va., in the Shenandoah valley; founded 1774. Nearby is the famous Natural Bridge over the gorge of Cedar Creek. It is a limestone arch 215 ft (66 m) hi...

satellite, natural

(Encyclopedia)satellite, natural, celestial body orbiting a planet, dwarf planet, asteroid, or star of a larger size. The most familiar natural satellite is the earth's moon; thus, satellites of other planets are o...

natural childbirth

(Encyclopedia)natural childbirth: see birth.

natural selection

(Encyclopedia)natural selection: see selection. ...

Natural History, American Museum of

(Encyclopedia)Natural History, American Museum of: see American Museum of Natural History. ...

American Museum of Natural History

(Encyclopedia)American Museum of Natural History, incorporated in New York City in 1869 to promote the study of natural science and related subjects. Buildings on its present site facing Central Park were opened in...

Field Museum of Natural History

(Encyclopedia)Field Museum of Natural History, in Chicago, Ill. Founded in 1893 through the gifts of Marshall Field and others, it was first known as the Columbian Museum of Chicago and in 1905 was renamed in honor...

liquefied natural gas

(Encyclopedia)liquefied natural gas: see under natural gas. ...