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Pedersen, Charles John

(Encyclopedia)Pedersen, Charles John, 1904–89, American chemist, b. Busan, Korea, M.S. Massachusetts Institute of Technology, 1927. After finishing his studies, Pedersen began work as a research chemist for the D...

observatory

(Encyclopedia)observatory, scientific facility especially equipped to detect and record naturally occurring scientific phenomena. Although geological and meteorological observatories exist, the term is generally ap...

telephone

(Encyclopedia)CE5 Hand telephone telephone, device for communicating sound, especially speech, usually by means of wires in an electric circuit. The telephones now in general use evolved from the device invente...

Alferov, Zhores Ivanovich

(Encyclopedia)Alferov, Zhores Ivanovich, 1930–2019, Russian physicist, b. Vitebsk (now in Belarus), Ph.D. V. I. Ulyanov Electrotechnical Institute, 1952. He joined the research staff of the A. F. Ioffe Physico-Te...

Haleakala Observatories

(Encyclopedia)Haleakala Observatories häˌlāäˌkäläˈ [key], astronomical facilities located on the summit of Haleakala volcano, 10,023 ft (3,055 m), in Haleakala National Park, Maui island, Hawaii. Because of...

Zhivkov, Todor

(Encyclopedia)Zhivkov, Todor tôˈdôr zhĭvkôfˈ [key], 1911–98, Bulgarian political leader. A printer, and a Communist party member from 1932, he rose to prominence as a partisan leader during World War II and...

Smoot, George Fitzgerald, 3d

(Encyclopedia)Smoot, George Fitzgerald, 3d smo͞ot [key], 1945–, American astrophysicist, b. Jacksonville, Fl., Ph.D. Massachusetts Institute of Technology 1970. Smoot has been a professor at the Univ. of Califor...

Steppe Geoglyphs

(Encyclopedia)Steppe Geoglyphs or Turgay Geoglyphs, ancient earthworks in Kostanay prov., N Kazakhstan. Located across the Turgay steppe, the more than 250 earthworks consist of squares, crosses, circles, lines, an...

Fort Peck Dam

(Encyclopedia)Fort Peck Dam, 21,430 ft (6,531 m) long and 250 ft (76 m) high, on the Missouri River, NE Mont.; one of the world's largest earth-filled dams. The dam was built (1933–40) by the U.S. Army Corps of E...

oasis

(Encyclopedia)oasis ōāˈsĭs [key], an area within a desert where the water table reaches the surface, with enough moisture to permit the growth of vegetation. The water may come up to the surface in springs, or ...