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coronavirus

(Encyclopedia)coronavirus, any of a group (family Coronaviridae, subfamily Orthocoronavirinae) of enveloped single-stranded RNA viruses that have a crownlike or sunlike appearance under an electron microscope due t...

Yalta Conference

(Encyclopedia)Yalta Conference, meeting (Feb. 4–11, 1945), at Yalta, Crimea, USSR, of British Prime Minister Winston Churchill, U.S. President Franklin Delano Roosevelt, and Soviet Premier Joseph Stalin. Most of ...

biological warfare

(Encyclopedia)biological warfare, employment in war of microorganisms to injure or destroy people, animals, or crops; also called germ or bacteriological warfare. Limited attempts have been made in the past to spre...

Gulf Stream

(Encyclopedia)Gulf Stream, warm ocean current of the N Atlantic Ocean, off E North America. It was first described (1513) by Spanish explorer Ponce de León. The Gulf Stream originates in the Gulf of Mexico and, as...

Lawrence Berkeley National Laboratory

(Encyclopedia)Lawrence Berkeley National Laboratory and Lawrence Livermore National Laboratory, scientific research centers run by the Univ. of California, located in Berkeley, Calif., and Livermore, Calif., respec...

Kirov Ballet

(Encyclopedia)Kirov Ballet, one of the two major ballet companies of Russia, the other being the Bolshoi Ballet. In 1991 it was officially renamed the St. Petersburg Mariinsky Ballet; however, on its frequent tours...

Strategic Air Command

(Encyclopedia)Strategic Air Command (SAC), former command of the U.S. air force (see Air Force, United States Department of the) charged with organizing, training, equipping, administering, and preparing strategic ...

Yoshida, Shigeru

(Encyclopedia)Yoshida, Shigeru shēgāˈro͞o yōˈshēdä [key], 1878–1967, Japanese statesman. He was until 1954 the most powerful political figure in postwar Japan. He was ambassador to Italy (1930–32) and t...

Horn, Cape

(Encyclopedia)Horn, Cape, headland, 1,391 ft (424 m) high, S Chile, southernmost point of South America, in the archipelago of Tierra del Fuego. It was discovered and first rounded by Willem Schouten, the Dutch nav...

puna

(Encyclopedia)puna po͞oˈnä [key], high plateau region, 12,000 to 16,000 ft (3,658–4,877 m) high, between ridges of the Andes in Peru and Bolivia. Arid, cold, and in general, covered by short coarse grass, the ...