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space medicine

(Encyclopedia)space medicine, study of the medical and biological effects of space travel on living organisms. The principal aim is to discover how well and for how long humans can withstand the extreme conditions ...

Arctic Ocean

(Encyclopedia)Arctic Ocean, the smallest ocean, c.5,400,000 sq mi (13,986,000 sq km), located entirely within the Arctic Circle and occupying the region around the North Pole. The Arctic basin was almost wholly u...

musicals

(Encyclopedia)musicals, earlier known as musical comedies, plays that incorporate music, song, and dance. These elements move with the plot, heightening and commenting on the action. Mixing the sprightly songs and ...

Amazon, river, Peru and Brazil

(Encyclopedia)Amazon, Port. Amazonas ämäzōˈnəs [key], world's second longest river, c.3,900 mi (6,280 km) long, formed by the junction in N Peru's Andes Mts. of two major headstreams, the Ucayali and the short...

Tammany

(Encyclopedia)Tammany tămˈənē [key] or Tammany Hall, popular name for the Democratic political machine in Manhattan. Tammany suffered a telling defeat in the election of 1932 and did not regain its former s...

Constitutional Convention

(Encyclopedia)Constitutional Convention, in U.S. history, the 1787 meeting in which the Constitution of the United States was drawn up. The convention at Philadelphia drew up one of the most influential document...

Panama Canal

(Encyclopedia)Panama Canal, waterway across the Isthmus of Panama, connecting the Atlantic (by way of the Caribbean Sea) and Pacific oceans, built by the United States (1904–14, on territory leased from the repub...

suburb

(Encyclopedia)suburb, a community in an outlying section of a city or, more commonly, a nearby, politically separate municipality with social and economic ties to the central city. In the 20th cent., particularly i...

Antarctica

(Encyclopedia)CE5 Antarctica ăntärkˈtĭkə, –ärˈtĭkə [key], the fifth largest continent, c.5,500,000 sq mi (14,245,000 sq km), asymmetrically centered on the South Pole and almost entirely within the An...

Supreme Court Justices (table)

(Encyclopedia)Supreme Court Justices(including dates on bench) Chief Justices Associate Justices ...