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da Silva, Luiz Inácio

(Encyclopedia)da Silva, Luiz Inácio lo͞oēshˈ ēnäsˈyo͞o dä sēlˈvə [key], 1945–, Brazilian labor leader and politician, known as Lula, b. Vargem Grande (now Caetés), Pernambuco. Born into a poor family...

Popper, Sir Karl Raimund

(Encyclopedia)Popper, Sir Karl Raimund, 1902–94, Anglo-Austrian philosopher, b. Vienna. He became familiar with the Vienna circle of logical positivists (see logical positivism) while a student at the Univ. of Vi...

ordeal

(Encyclopedia)ordeal, ancient legal custom whereby an accused person was required to perform a test, the outcome of which decided the person's guilt or innocence. By an ordeal, appeal was made to divine authority t...

Gates, Bill

(Encyclopedia)Gates, Bill (William Henry Gates 3d), 1955–, American business executive, b. Seattle, Wash. At the age of 19, Gates founded (1975) the Microsoft Corp....

HIV

(Encyclopedia)HIV, human immunodeficiency virus, either of two closely related retroviruses that invade T-helper lymphocytes and are responsible for AIDS. There are two types of HIV: HIV-1 and HIV-2. HIV-1 is respo...

International Court of Justice

(Encyclopedia)International Court of Justice, principal judicial organ of the United Nations, established 1946 by chapter 14 of the UN Charter. It superseded the Permanent Court of International Justice (see World ...

Brown v. Board of Education of Topeka, Kans.

(Encyclopedia)Brown v. Board of Education of Topeka, Kans., case decided by the U.S. Supreme Court in 1954. Linda Brown was denied admission to her local elementary school in Topeka because she was black. When, com...

Wounded Knee

(Encyclopedia)Wounded Knee, creek, rising in SW S.Dak. and flowing NW to the White River; site of the last major battle of the Indian wars. The ...

Black Panthers

(Encyclopedia)Black Panthers, U.S. African-American militant party, founded (1966) in Oakland, Calif., by Huey P. Newton and Bobby Seale. Originally aimed at armed self-defense against the local police, the party g...

Neolithic period

(Encyclopedia)Neolithic period or New Stone Age. The term neolithic is used, especially in archaeology and anthropology, to designate a stage of cultural evolution or technological development characterized by the ...