Columbia Encyclopedia

(Encyclopedia) thresher shark, long-tailed, warm-water shark, genus Alopias. The upper fork of its tail is slender and sickle-shaped and is about equal in length to the rest of the body. This shark uses its tail str...

(Encyclopedia) Sacramento, longest river of Calif., c.380 mi (610 km) long, rising near Mt. Shasta, N Calif., and flowing generally SW to Suisun Bay, an arm of San Francisco Bay, where it forms a large delta with th...

(Encyclopedia) Syr Darya or Syrdarya both: sēr däryäˈ, –därˈyə [key], ancient Jaxartes or Yaxartes, Pers. Sihun, river, c.1,380 mi (2,220 km) long, flowing through Uzbekistan, Tajikistan, and Kazakhstan. On...

(Encyclopedia) Teagarden, Jack (Weldon Leo Teagarden), 1905–64, American jazz trombonist and singer, b. Vernon, Tex. One of the earliest white bluesmen, he came from a jazz-playing family and was mainly self-taugh...

(Encyclopedia) porgy pôrˈgē [key], common name for members of the Sparidae, a family of small-mouthed fishes with strong teeth adapted for crushing their food of shellfish and crustaceans. Porgies are found in wa...

(Encyclopedia) Eggleston, William (William Joseph Eggleston, Jr.), 1939–, American photographer credited with establishing color photography as an art form, b. Memphis Tenn. His early work in black and white was i...

(Encyclopedia) geochemistry, study of the chemical changes on the earth. More specifically, it is the study of the absolute and relative abundances of chemical elements in the minerals, soils, ores, rocks, water, an...

(Encyclopedia) angler or anglerfish, common name for a member of the order Lophiiformes, predacious fishes found worldwide; many are deep-sea dwellers. Anglers lure their prey with a long, wormlike appendage that ex...

(Encyclopedia) Frisian Islands frĭzhˈən [key], chain of low-lying islands, off the coasts of the Netherlands, Germany, and Denmark, in the North Sea. The West Frisian Islands, also known as the Wadden Islands, be...

(Encyclopedia) Nile, longest river in the world, c.4,160 mi (6,695 km) long from its remotest headstream, the Luvironza River in Burundi, central Africa, to its delta on the Mediterranean Sea, NE Egypt. The Nile flo...