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Khan, Abdul Qadeer

(Encyclopedia) Khan, Abdul Qadeer (A. Q. Khan), 1936–, Pakistani metallurgical engineer, often called the father of Pakistan's atomic bomb, b. Bhopal, India. He moved (1952) to Pakistan and studied…

Harz

(Encyclopedia) HarzHarzhärts [key], mountain range, northern Germany, extending c.60 mi (100 km) between the Elbe and Leine rivers. The rugged mountains were once densely forested. They culminate in…

Swakopmund

(Encyclopedia) SwakopmundSwakopmundsfäˈkôpmənt [key], municipality (1991 pop. 17,681), W Namibia, on the Atlantic at mouth of Swakop River. A rail terminus and seaside resort surrounded by the Namib…

Aozou Strip

(Encyclopedia) Aozou StripAozou Stripouˈz&oomacr; [key], 114,000 sq mi (295,000 sq km) strip of land in N Chad on the Libyan border. The region, which is believed to have significant uranium and…

How Old Is the Grand Canyon?

The Grand Canyon may be 10 million years older than we thought by Liz Olson Visit our Grand Canyon Slideshow.Photo of the Grand Canyon courtesy of Carol M. Highsmith…

Athabasca, Lake

(Encyclopedia) Athabasca, Lake, fourth largest lake of Canada, c.3,120 sq mi (8,100 sq km), c.200 mi (320 km) long and from 5 to 35 mi (8–56 km) wide, NE Alta., and SW Sask., at the edge of the…

Semipalatinsk Test Site

(Encyclopedia) Semipalatinsk Test Site, Soviet nuclear testing site, c.6,950 sq mi (18,000 sq km), NE Kazakhstan, near the city of Kurchatov and some 90 mi (150 km) W of Semey (formerly Semipalatinsk…

Rapid City

(Encyclopedia) Rapid City, city (1990 pop. 54,523), seat of Pennington co., SW S.Dak., on Rapid Creek, in an irrigated farm region served by the Bureau of Reclamation's Rapid Valley project; founded…

Urey, Harold Clayton

(Encyclopedia) Urey, Harold ClaytonUrey, Harold Claytony&oobreve;rˈē [key], 1893–1981, American chemist, b. Walkerton, Ind., grad. Univ. of Montana (B.S., 1917), Ph.D. Univ. of California, 1923.…

Northern Territory

(Encyclopedia) Northern Territory, territory (2016 pop. 228,833), 520,280 sq mi (1,347,525 sq km), N central Australia. It is bounded on the N by the Timor Sea, the Arafura Sea, and the Gulf of…