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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...

Dett, Robert Nathaniel

(Encyclopedia)Dett, Robert Nathaniel, 1882–1943, American composer and pianist, b. Drummondville, Que. After receiving degrees from Oberlin College and the Eastman School of Music, Dett studied in Paris with Nadi...

Drew, Robert Lincoln

(Encyclopedia)Drew, Robert Lincoln, 1924–2014, American documentary filmmaker, b. Toledo, Ohio. After serving in the U.S. Army Air Forces during World War II, he worked for Life as a writer and editor. On a Neima...

Duncan, Robert Kennedy

(Encyclopedia)Duncan, Robert Kennedy, 1868–1914, American industrial chemist and educator b. Brantford, Ont., grad. Univ. of Toronto (B.A., 1892). He was professor at the Univ. of Kansas (1906–10) and at the Un...

Darwin, Charles Robert

(Encyclopedia)Darwin, Charles Robert, 1809–82, English naturalist, b. Shrewsbury; grandson of Erasmus Darwin and of Josiah Wedgwood. He firmly established the theory of organic evolution known as Darwinism. He st...

Coucy, Robert de

(Encyclopedia)Coucy, Robert de rōbĕrˈ də ko͞osēˈ [key], d.1311, French architect, celebrated for his part in the building of Reims Cathedral, which he carried on as master of the works after the death of Hug...

Childers, Robert Erskine

(Encyclopedia)Childers, Robert Erskine chĭlˈdərz [key], 1870–1922, Irish politician and author. Born into a Protestant family, he was a clerk in the House of Commons (1895–1910). Gradually becoming convinced...