civilizations based on irrigation
91Maya — /mah yeuh/, n., pl. Mayas, (esp. collectively) Maya, adj. n. 1. a member of a major pre Columbian civilization of the Yucatán Peninsula that reached its peak in the 9th century A.D. and produced magnificent ceremonial cities with pyramids, a… …
92United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
93Architecture and Civil Engineering — ▪ 2009 Introduction Architecture For Notable Civil Engineering Projects in work or completed in 2008, see Table (Notable Civil Engineering Projects (in work or completed, 2008)). Beijing was the centre of the world of architecture… …
94primitive culture — Introduction in the lexicon of early anthropologists, any of numerous societies characterized by features that may include lack of a written language, relative isolation, small population, relatively simple social institutions and… …
95Moche — Culture Moche Culture ← …
96Decline of the Roman Empire — This article is about the historiography of the decline of the Roman Empire. For a description of events, see Roman Empire. For the book by Edward Gibbon, see The History of the Decline and Fall of the Roman Empire. For the film, see The Fall of… …
97Abu Dhabi — This article is about the city. For the emirate, see Abu Dhabi (emirate). Abu Dhabi أبوظبي Abū Dhabi   City   City of Abu Dhabi …
98Tunisia — Tunisian, adj., n. /tooh nee zheuh, sheuh, nizh euh, nish euh, tyooh /, n. a republic in N Africa, on the Mediterranean: a French protectorate until 1956. 9,183,097; 48,330 sq. mi. (125,175 sq. km). Cap.: Tunis. * * * Tunisia Introduction Tunisia …
99political philosophy — Branch of philosophy that analyzes the state and related concepts such as political obligation, law, social justice, and constitution. The first major work of political philosophy in the Western tradition was Plato s Republic. Aristotle s… …
100hydrologic sciences — Introduction the fields of study concerned with the waters of the Earth. Included are the sciences of hydrology, oceanography, limnology, and glaciology. In its widest sense hydrology encompasses the study of the occurrence, the… …
