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Antarctic Peninsula

(Encyclopedia)Antarctic Peninsula, glaciated mountain region of W Antarctica, extending c.1,200 mi (1,930 km) N toward South America. In the south, volcanic peaks rise to c.11,000 ft (3,350 m); other volcanic cones...

Davisson, Clinton Joseph

(Encyclopedia)Davisson, Clinton Joseph dāˈvĭsən [key], 1881–1958, American physicist, b. Bloomington, Ill. He joined the engineering department of the Bell Telephone Laboratories in 1917. Davisson worked on t...

Richter, Ludwig

(Encyclopedia)Richter, Ludwig rĭkhˈtər [key], 1803–84, German painter, illustrator, and etcher; son and pupil of the engraver Karl Richter (1770–1848). His characteristic paintings combine figure and landsc...

Ardashir I

(Encyclopedia)Ardashir I ärdäshērˈ [key] [another form of Artaxerxes], d. 240, king of Persia (226?–240). He overthrew the last Parthian king, Artabanus IV, entered Ctesiphon, and reunited Persia out of the c...

Lamar, Mirabeau Buonaparte

(Encyclopedia)Lamar, Mirabeau Buonaparte mĭrˈəbōˌ bōˈnəpärtˌ [key], 1798–1859, president of the Texas republic (1838–41), b. Warren co., Ga. He went to Texas (1835), joined the revolutionaries, and to...

White, Ellen Gould (Harmon)

(Encyclopedia)White, Ellen Gould (Harmon), 1827–1915, leader of the Seventh-day Adventists, b. Gorham, Maine. Converted at the age of 15 to the beliefs of the Adventists, she began to receive visions accepted as ...

Rodchenko, Aleksandr

(Encyclopedia)Rodchenko, Aleksandr. 1891–1956, Russian painter, sculptor, photographer, and designer, b. St. Petersburg. One of the most important and versatile avant-garde artists to emerge after the Russian Rev...

Peter I, king of Serbia

(Encyclopedia)Peter I, 1844–1921, king of Serbia (1903–18) and king of the Serbs, Croats, and Slovenes (1918–21), son of Prince Alexander of Serbia (Alexander Karadjordjević). He was brought up in exile in G...

Cooper, Gary

(Encyclopedia)Cooper, Gary, 1901–61, American film actor, b. Helena, Mont., as Frank James Cooper. His first important starring role in A Farewell to Arms (1933) was followed by such films as Mr. Deeds Goes to To...

Gordon, Bruce S.

(Encyclopedia)Gordon, Bruce S., 1946–, African-American business executive and civil-rights leader, b. Camden, N.J.; grad. Gettysburg College (B.A., 1968), Massachusetts Institute of Technology (M.S., 1988). Gord...