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tragedy

(Encyclopedia)tragedy, form of drama that depicts the suffering of a heroic individual who is often overcome by the very obstacles he is struggling to remove. The protagonist may be brought low by a character flaw ...

Galileo

(Encyclopedia)Galileo (Galileo Galilei) gălˌĭlēˈō; gälēlĕˈō gälēlĕˈē [key], 1564–1642, great Italian astronomer, mathematician, and physicist. By his persistent investigation of natural laws he la...

Paleolithic period

(Encyclopedia)Paleolithic period pāˌlēəlĭthˈĭk, –lēō–, pălˌ– [key] or Old Stone Age, the earliest period of human development and the longest phase of mankind's history. It is approximately coexten...

Gregory VII, Saint

(Encyclopedia)Gregory VII, Saint, d. 1085, pope (1073–85), an Italian (b. near Rome) named Hildebrand (Ital. Ildebrando); successor of Alexander II. He was one of the greatest popes. Feast: May 25. Gregory's co...

Chatham, William Pitt, 1st earl of

(Encyclopedia)Chatham, William Pitt, 1st earl of chătˈəm [key], 1708–78, British statesman, known as the Great Commoner. Proud, dramatic, and patriotic, Chatham excelled as a war minister and orator. He was th...

Teamsters Union

(Encyclopedia)Teamsters Union, U.S. labor union formed in 1903 by the amalgamation of the Team Drivers International Union and the Teamsters National Union. Its full name is the International Brotherhood of Teamste...

swimming

(Encyclopedia)swimming, self-propulsion through water, often as a form of recreation or exercise or as a competitive sport. It is mentioned in many of the classics in connection with heroic acts or religious rites....

volcano

(Encyclopedia)volcano, vents or fissures in the earth's crust through which gases, molten rock, or lava, and solid fragments are discharged. Their study is called volcanology. The term volcano is commonly applied b...

astronomy

(Encyclopedia)astronomy, branch of science that studies the motions and natures of celestial bodies, such as planets, stars, and galaxies; more generally, the study of matter and energy in the universe at large. ...

Porifera

(Encyclopedia)CE5 A. Canal systems of the three morphological types of sponges B. Internal anatomy of an asconoid sponge, representative of the phylum Porifera Porifera pōrĭfˈərə [key] [Lat.,=pore bearer],...