Columbia Encyclopedia

Search results

258 results found

Mojave Desert

(Encyclopedia)Mojave or Mohave Desert, c.15,000 sq mi (38,850 sq km), region of low, barren mountains and flat valleys, 2,000 to 5,000 ft (610–1,524 m) high, S Calif.; part of the Great Basin of the United States...

Mitchell, George John

(Encyclopedia)Mitchell, George John, 1933–, U.S. public official, b. Waterville, Maine. An attorney in private and government practice in the 1960s and 1970s, he was a protege of Senator Edmund Muskie. Generally ...

draft riots

(Encyclopedia)draft riots, in the American Civil War, mob action to protest unfair Union conscription. The Union Conscription Act of Mar. 3, 1863, provided that all able-bodied males between the ages of 20 and 45 w...

dairying

(Encyclopedia)dairying, business of producing, processing, and distributing milk and milk products. Ninety percent of the world's milk is obtained from cows; the remainder comes from goats, buffaloes, sheep, reinde...

polymerase chain reaction

(Encyclopedia)polymerase chain reaction pŏlˈĭmərāsˌ [key] (PCR), laboratory process in which a particular DNA segment from a mixture of DNA chains is rapidly replicated, producing a large, readily analyzed sa...

space shuttle

(Encyclopedia)space shuttle, reusable U.S. space vehicle (1981–2011). Developed by the National Aeronautics and Space Administration (NASA) and officially known as the Space Transportation System (STS), it was th...

rocket, in aeronautics

(Encyclopedia)CE5 Relative positions of the components of the Saturn V rocket, the U.S. space vehicle used in the moon missions rocket, any vehicle propelled by ejection of the gases produced by combustion of s...

Manhattan Project

(Encyclopedia)Manhattan Project, the wartime effort to design and build the first nuclear weapons (atomic bombs). With the discovery of fission in 1939, it became clear to scientists that certain radioactive materi...

Chernobyl

(Encyclopedia)Chernobyl chĭrnōˈbyēl [key], Ukr. Chornobyl, abandoned city, N Ukraine, near the Belarus border, on the Pripyat River. Ten miles (16 km) to the north, in the town of Pripyat, is the Chernobyl nucl...

Russell, John Russell, 1st Earl

(Encyclopedia)Russell, John Russell, 1st Earl, 1792–1878, British statesman; younger son of the 6th duke of Bedford, known most of his life as Lord John Russell. He became a Whig member of Parliament in 1813 and ...