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Greenbelt

(Encyclopedia)Greenbelt, city (2020 pop. 24,921), Prince Georges co., W central Md., a residential suburb of Washington, D.C.; chartered 1937. Greenbelt was planned a...

magnetic levitation

(Encyclopedia)magnetic levitation or maglev măgˈlĕv [key], support and often propulsion of objects or vehicles by the use of magnets. The magnets used in magnetic levitation suspend an object free of contact wit...

Mather, John Cromwell

(Encyclopedia)Mather, John Cromwell, 1946–, American astrophysicist, b. Roanoke, Va., Ph.D. Univ. of California, Berkeley, 1974. He has been a researcher at NASA's Goddard Space Flight Center in Greenbelt, Md., s...

Barnes, Harry Elmer

(Encyclopedia)Barnes, Harry Elmer, 1889–1968, American historian and sociologist, b. Auburn, N.Y. He received his Ph.D. from Columbia in 1918 and taught economics, sociology, and history at various institutions o...

Lefkowitz, Robert Joseph

(Encyclopedia)Lefkowitz, Robert Joseph, 1943–, American physician, b. New York City, M.D. Columbia, 1966. Since 1973 Lefkowitz has been a professor at Duke Univ.; he was appointed a Howard Hughes Medical Institut...

Jenkinson, Robert Banks

(Encyclopedia)Jenkinson, Robert Banks: see Liverpool, Robert Banks Jenkinson, 2d earl of. ...

Laughlin, Robert Betts

(Encyclopedia)Laughlin, Robert Betts, 1950–, American physicist, b. Visalia, Calif., Ph.D. Massachusetts Institute of Technology, 1979. Laughlin was a researcher at Lawrence Livermore National Laboratory from 198...

Kennedy, Robert Francis

(Encyclopedia)Kennedy, Robert Francis, 1925–68, American politician, U.S. Attorney General (1961–64), b. Brookline, Mass., younger brother of President John F. Kennedy and son of Joseph P. Kennedy. A graduate o...

Lee, Robert Edward

(Encyclopedia)Lee, Robert Edward, 1807–70, general in chief of the Confederate armies in the American Civil War, b. Jan. 19, 1807, at Stratford, Westmoreland co., Va.; son of Henry (“Light-Horse Harry”) Lee. ...