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Martin, Agnes

(Encyclopedia)Martin, Agnes (Agnes Bernice Martin), 1912–2004, American painter, b. Macklin, Canada. She moved to the United States in 1931, began painting in 1942,...

Kindelberger, Dutch

(Encyclopedia)Kindelberger, Dutch (James Howard Kindelberger), 1895–1962, b. Wheeling, W.Va., American aerospace pioneer. In 1917 he joined the army and went into the signal corps, serving as a pilot instructor. ...

Pohl, Frederik

(Encyclopedia)Pohl, Frederik (Frederik George Pohl, Jr.) pōl [key], 1919–2013, American science-fiction writer, b. New York City. Early in his career he often collaborated with other writers, particularly Cyril ...

vertigo

(Encyclopedia)vertigo vûrˈtĭgō [key], sensations of moving in space or of objects moving about a person and the resultant difficulty in maintaining equilibrium. True vertigo, as distinguished from faintness, li...

string theory

(Encyclopedia)string theory, description of elementary particles based on one-dimensional curves, or “strings,” instead of point particles. Superstring theory, which is string theory that contains a kind of sym...

Thorne, Kip Stephen

(Encyclopedia)Thorne, Kip Stephen, 1940–, American theoretical physicist, b. Logan, Utah. Ph.D. Princeton, 1965. Thorne has been a professor (emeritus from 2009) at the California Institute of Technology since 19...

Ting, Samuel Chao Chung

(Encyclopedia)Ting, Samuel Chao Chung, 1936–, American physicist, b. Ann Arbor, Mich., Ph.D. Univ. of Michigan 1962. Ting was a professor at Columbia from 1965 to 1969, when he joined the faculty at the Massachus...

Rosso, Il

(Encyclopedia)Rosso, Il ēl rôsˈsō [key], 1495–1540, Italian painter, one of the founders of mannerism, b. Florence. His real name was Giovan Battista di Iacopo di Gasparre. Influences of Andrea del Sarto and ...

Rhea, in astronomy

(Encyclopedia)Rhea, in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn V (or S5), Rhea is 950 mi (1530 km) in diameter, orbits Saturn at a mean distance of 327,487 mi (527,...

dredging

(Encyclopedia)dredging, process of excavating materials underwater. It is used to deepen waterways, harbors, and docks and for mining alluvial mineral deposits, including tin, gold, and diamonds. The Dutch at an ea...