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dam
(Encyclopedia)dam, barrier, commonly across a watercourse, to hold back water, often forming a reservoir or lake; dams are also sometimes used to control or contain rockslides, mudflows, and the like in regions whe...aluminum
(Encyclopedia)aluminum ălˌyo͞omĭnˈēəm [key], metallic chemical element; symbol Al; at. no. 13; at. wt. 26.98154; m.p. 660.37℃; b.p. 2,467℃; sp. gr. 2.6989 at 20℃; valence +3. Aluminum is a silver-white...Cretaceous period
(Encyclopedia)Cretaceous period krĭtāˈshəs [key], third and last period of the Mesozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table), lasting from approximately 144 to 65 millio...sculpture
(Encyclopedia)sculpture, art of producing in three dimensions representations of natural or imagined forms. It includes sculpture in the round, which can be viewed from any direction, as well as incised relief, in ...coal
(Encyclopedia)coal, fuel substance of plant origin, largely or almost entirely composed of carbon with varying amounts of mineral matter. Coal is found in beds or seams interstratified with shales, clays, sands...Sumerian and Babylonian art
(Encyclopedia)Sumerian and Babylonian art, works of art and architecture created by the Sumerian and Babylonian peoples of ancient Mesopotamia, civilizations which had an artistic tradition of remarkable antiquity,...Popes of the Roman Catholic Church (table)
(Encyclopedia) Popes of the Roman Catholic ChurchIn the following list, the date of election, rather than of consecration, is given. Before St. Victor I (189), dates may err by one year. Antipopes—i.e., those men...Togo
(Encyclopedia) CE5 Togo, officially Togolese Republic, republic (2015 est. pop. 7,417,000), 21,622 sq mi (56,000 sq km), W Africa. It borders on the Gulf of Guinea in the south, on Ghana in the west, on Burkina F...Rulers of the Roman Empire (table)
(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...book collecting
(Encyclopedia)book collecting, or bibliophily, the acquiring of books that are, or are expected to become, rare and that possess permanent interest in addition to their texts. Collecting has traditionally concentra...Browse by Subject
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