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Lowell Observatory

(Encyclopedia)Lowell Observatory, astronomical observatory located in Flagstaff, Ariz.; it was founded in 1894 by Percival Lowell, the American astronomer who popularized the idea that Mars might support intelligen...

dark energy

(Encyclopedia)dark energy, repulsive force that opposes the self-attraction of matter (see gravitation) and causes the expansion of the universe to accelerate. The search for dark energy was triggered by the discov...

Stevens

(Encyclopedia)Stevens, family of U.S. inventors. John Stevens, 1749–1838, b. New York City, was graduated from King's College (now Columbia Univ.) in 1768. He studied law (1768–71) and soon joined his father, a...

Shevchenko, Taras Hryhorovych

(Encyclopedia)Shevchenko, Taras, 1814–1861, Ukrainian poet, writer, and artist, b. Ukraine, studied at the St. Petersburg Academy of Art. The premier Ukrainian poet...

African National Congress

(Encyclopedia)African National Congress (ANC), the oldest black (now multiracial) political organization in South Africa; founded in 1912. Prominent in its opposition to apartheid, the organization began as a nonvi...

York, city, England

(Encyclopedia)York, city and unitary authority (2011 pop. 198,051), N England, at the confluence of the Ouse and Foss rivers. It is located at the historical junction of the three ridings of Yorkshire. York, a rail...

Welles, Gideon

(Encyclopedia)Welles, Gideon wĕlz [key], 1802–78, American statesman, b. Glastonbury, Conn. He was (1826–36) editor and part owner of the Hartford Times, one of the first New England papers to support Andrew J...

Wilde, Oscar

(Encyclopedia)Wilde, Oscar (Oscar Fingal O'Flahertie Wills Wilde), 1854–1900, Irish author and wit, b. Dublin. He is most famous for his sophisticated, brilliantly witty plays, which were the first since the come...

Zuma, Jacob Gedleyihlekisa

(Encyclopedia)Zuma, Jacob Gedleyihlekisa, 1942–, South African political leader, b. Indkandla, Natal (now KwaZulu-Natal) prov. Zuma received no formal schooling and joined the African National Congress (ANC) when...

Seaborg, Glenn Theodore

(Encyclopedia)Seaborg, Glenn Theodore sēˈbôrg [key], 1912–99, American chemist, b. Ishpeming, Mich., grad. Univ. of California at Los Angeles, 1934, Ph.D. Univ. of California at Berkeley, 1937. In 1939, he beg...