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Biosphere 2

(Encyclopedia)Biosphere 2, privately funded ecological research project in which eight people lived sealed in a 3.15-acre (1.28-hectare) structure for two years (Sept. 26, 1991–Sept. 26, 1993). Located in Oracle,...

Yuma, city, United States

(Encyclopedia)Yuma yo͞oˈ mə [key], city (1990 pop. 54,923), seat of Yuma co., extreme SW Ariz., on the eastern bank of the Colorado River near the confluence of the Gila River; founded 1854, inc. as a city 1914....

Sara

(Encyclopedia)Sara or Sarah, in the Bible, wife of Abraham and mother of Isaac. With Rebecca, Rachel, and Leah, she was one of the four Hebrew matriarchs. Her name was originally Sarai [Heb.,=princess]. She was chi...

rain

(Encyclopedia)rain, precipitation in liquid form. It consists of drops of water falling from clouds; if the drops are very small, they are collectively termed drizzle. Rain plays a key role in the hydrologic, or wa...

Phoenix, city, United States

(Encyclopedia)Phoenix, city (1990 pop. 983,403), state capital and seat of Maricopa co., S Ariz., on the Salt River; inc. 1881. It is the largest city in Arizona, the hub of the rich agricultural region of the Salt...

Indian Ocean

(Encyclopedia)Indian Ocean, third largest ocean, c.28,350,000 sq mi (73,427,000 sq km), extending from S Asia to Antarctica and from E Africa to SE Australia; it is c.4,000 mi (6,400 km) wide at the equator. It con...

Karachi

(Encyclopedia)Karachi kəräˈchē [key], city (1998 pop. 9,269,265), largest city and former capital of Pakistan, SE Pakistan, on the Arabian Sea near the Indus River delta. The capital of Sind prov., it is Pakist...

Bombay

(Encyclopedia)Bombay bŏmbāˈ [key], former state, W central India, on the Arabian Sea. The state contained within its borders the former Portuguese colonies of Goa and Daman and Diu. Historical remains exist from...

Rift Valley fever

(Encyclopedia)Rift Valley fever, acute viral disease that affects domestic livestock and can be transmitted to humans. The disease is most common in E and S Africa, but also occurs widely in sub-Saharan Africa and ...

Durango, state, Mexico

(Encyclopedia)Durango do͞orängˈgō [key], state, 47,691 sq mi (123,520 sq km), N central Mexico. The city of ...