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mass extinction
(Encyclopedia)mass extinction, the extinction of a large percentage of the earth's species, opening ecological niches for other species to fill. There have been at least ten such events. The five greatest were thos...Reagan, Ronald Wilson
(Encyclopedia)Reagan, Ronald Wilson rāˈgən [key], 1911–2004, 40th president of the United States (1981–89), b. Tampico, Ill. In 1932, after graduation from Eureka College, he became a radio announcer and spo...horror
(Encyclopedia)horror or horror story, literary genre in which an eerie, tense, often suspenseful atmosphere typically builds to the discovery of something repugnant, such as cannibalism, incest, or the killing of c...organ
(Encyclopedia) CE5 Organ organ, a musical wind instrument in which sound is produced by one or more sets of pipes controlled by a keyboard, each pipe producing only one pitch by means of a mechanically produced ...periodical
(Encyclopedia)periodical, a publication that is issued regularly. It is distinguished from the newspaper in format in that its pages are smaller and are usually bound, and it is published at weekly, monthly, quarte...symphony
(Encyclopedia)symphony [Gr.,=sounding together], a sonata for orchestra. The Italian operatic overture, called sinfonia, was standardized by Alessandro Scarlatti at the end of the 17th cent. into three sections, th...Canadian art and architecture
(Encyclopedia)Canadian art and architecture, the various types and styles arts and structures produced in the geographic area that now constitutes Canada. For a discussion of the art of indigenous peoples of Canada...Carter, Jimmy
(Encyclopedia)Carter, Jimmy (James Earl Carter, Jr.), 1924–, 39th President of the United States (1977–81), b. Plains, Ga, grad. Annapolis, 1946. Carter served in the navy, where he worked with Admiral Hyman G....Crusades
(Encyclopedia) CE5 Crusader States (c.1140) Crusades kro͞oˈsādz [key], series of wars undertaken by European Christians between the 11th and 14th cent. to recover the Holy Land from the Muslims. After...piracy
(Encyclopedia)piracy, robbery committed or attempted on the high seas. It is distinguished from privateering in that the pirate holds no commission from and receives the protection of no nation but usually attacks ...Browse by Subject
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