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Hamilton, Sir William, Scottish philosopher

(Encyclopedia)Hamilton, Sir William, 1788–1856, Scottish philosopher. He was widely interested in law, physiology, and literature and was professor of history and philosophy at the Univ. of Edinburgh. Hamilton he...

American Museum of Natural History

(Encyclopedia)American Museum of Natural History, incorporated in New York City in 1869 to promote the study of natural science and related subjects. Buildings on its present site facing Central Park were opened in...

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 ...

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 ...

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...

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...

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,...

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...

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...

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...