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petroleum

(Encyclopedia)petroleum, oily, flammable liquid that occurs naturally in deposits, usually beneath the surface of the earth; it is also called crude oil. It consists principally of a mixture of hydrocarbons, with t...

World Trade Center

(Encyclopedia)World Trade Center, former building complex in lower Manhattan, New York City, consisting of seven buildings and a shopping concourse on a 16-acre (6.5-hectare) site; it was destroyed by a terrorist a...

states' rights

(Encyclopedia)states' rights, in U.S. history, doctrine based on the Tenth Amendment to the Constitution, which states, “The powers not delegated to the United States by the Constitution, nor prohibited by it to ...

newspaper

(Encyclopedia)newspaper, publication issued periodically, usually daily or weekly, to convey information and opinion about current events. In England large newspaper-publishing empires were built up by Lords...

city planning

(Encyclopedia)city planning, process of planning for the improvement of urban centers in order to provide healthy and safe living conditions, efficient transport and communication, adequate public facilities, and a...

railroad

(Encyclopedia)railroad or railway, form of transportation most commonly consisting of steel rails, called tracks, on which trains of freight cars, passenger cars, and other rolling stock are drawn by one locomotive...

Iroquois Confederacy

(Encyclopedia)Iroquois Confederacy or Iroquois League ĭrˈəkwoiˌ, –kwäˌ [key], North American confederation of indigenous peoples, initially comprising the Mohawk, Oneida, Onondaga, Cayuga, and Seneca; the n...

whaling

(Encyclopedia)whaling, the hunting of whales for the oil that can be rendered from their flesh, for meat, and for baleen (whalebone). Historically, whale oil was economically the most important. In 1932–33, par...

African art

(Encyclopedia)African art, art created by the peoples south of the Sahara. The predominant art forms are masks and figures, which were generally used in religious ceremonies. The decorative arts, especially in text...

Sumerian and Babylonian art

(Encyclopedia)Sumerian and Babylonian art, works of art and architecture created by the Sumerian and Babylonian peoples of ancient Mesopotamia, civilizations which had an artistic tradition of remarkable antiquity,...