Columbia Encyclopedia

(Encyclopedia)  Rulers of the Roman Empire(including dates of reign) Emperors in the East(until the fall of Rome; see table entitled Rulers of the Byzantine Empireat Byzantine Empire for later emperors) Empero...

(Encyclopedia) Greeley, Horace, 1811–72, American newspaper editor, founder of the New York Tribune, b. Amherst, N.H. Greeley supported Ulysses S. Grant during the first years of his administration but came to r...

(Encyclopedia) mystery or mystery story, literary genre in which the cause (or causes) of a mysterious happening, often a crime, is gradually revealed by the hero or heroine; this is accomplished through a mixture o...

(Encyclopedia)  CE5 Slovenia slōvēˈnēə [key], Slovene Slovenija, officially Republic of Slovenia, republic (2015 est. pop. 2,075,000), 7,817 sq mi (20,246 sq km). It is bounded in the north by Austria, in the...

(Encyclopedia) Papua New Guinea păpˈo͞oə, –yo͞oə, gĭnˈē [key], officially Independent State of Papua New Guinea, independent Commonwealth nation (2015 est. pop. 6,672,000), 183,540 sq mi (475,369 sq km), ...

(Encyclopedia) directing, the art of leading dramatic performances on the stage or in films. The modern theatrical director is in complete charge of all the artistic aspects of a dramatic presentation. It is the dir...

(Encyclopedia) secret police, policing organization operating in secrecy for the political purposes of its government, often with terroristic procedures. Many states, including Chile, Iran, Iraq, Israel, Romania,...

(Encyclopedia) contemporary art, the art of the late 20th cent. and early 21st cent., both an outgrowth and a rejection of modern art. As the force and vigor of abstract expressionism diminished, new artistic moveme...

(Encyclopedia)  CE5 Bohr-Rutherford atom CE5 Probability distribution of the electron in the hydrogen atom: A. Ground state B. Highly excited state atom [Gr.,=uncuttable (indivisible)], basic unit of matte...

(Encyclopedia) air pollution, contamination of the air by noxious gases and minute particles of solid and liquid matter (particulates) in concentrations that endanger health. The major sources of air pollution are t...