Columbia Encyclopedia

(Encyclopedia) Namib-Naukluft National Park, 19,216 sq mi (49,768 sq km), W Namibia, encompassing parts of the Namib Desert and the Naukluft mountain range. It was established in 1979 when the Namib Desert Park (beg...

(Encyclopedia) Charleston. 1 City (2020 pop. 17,286), seat of Coles co., E Ill.; inc. 1835. Charleston is an industrial, rail, and trade center located in an ...

(Encyclopedia) Homeland Security, United States Department of (DHS), executive department of the federal government charged with protecting the security of the American homeland as its main responsibility. Its prima...

(Encyclopedia) Bergonzi, Carlo, 1924–2014, Italian opera singer. He began his career as a baritone, debuting in 1948, but he made a second debut as a tenor in 1951 after realizing his voice was better suited to th...

(Encyclopedia) Rambouillet sheep rămˈbo͝olāˌ [key], fine-wool breed developed in France from the Spanish Merino sheep. It has become very popular in the United States and is the foundation of most of the Wester...

(Encyclopedia) Pindus pĭnˈdəs [key], Gr. Píndhos, chief mountain range of Greece, extending c.100 mi (160 km) S from the Albanian border through NW Greece. Mt. Smólikas (8,650 ft/2,637 m) is the highest peak. T...

(Encyclopedia) Bohemian Forest, Czech Český Les, Ger. Böhmerwald, mountain range, extending c.150 mi (240 km) along the S Czech-German border and extending into Austria. The Czech name for its southern section is...

(Encyclopedia) cline, in biology, any gradual change in a particular characteristic of a population of organisms from one end of the geographical range of the population to the other. Gradients of characteristics us...

(Encyclopedia) Rhodope rŏdˈəpē [key], Bulg. Rodopi Planina, Gr. Rodope, mountain range of the Balkan Peninsula, extending c.200 mi (320 km) from the Struma River, SE Bulgaria, to the lower Maritsa River, NE Gree...

(Encyclopedia) Colorado tick fever or mountain tick fever, acute disease caused by infection with a double-stranded RNA virus (a Coltvirus) that is transmitted to humans by Rocky Mountain wood ticks (Dermacentor and...