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Bachelet, Michele

(Encyclopedia)Bachelet, Michele (Verónica Michele Bachelet Jeria) bĕōnˈēka mēchĕlˈ bächĕlĕtˈ herˈēä [key], 1951–, Chilean political leader and government official, president of Chile (2006–10, 20...

supercomputer

(Encyclopedia)supercomputer, a state-of-the-art, extremely powerful computer capable of manipulating massive amounts of data in a relatively short time. Supercomputers are very expensive and are employed for specia...

Thíra

(Encyclopedia)Thíra or Thera both: thērˈə [key], volcanic island (1991 pop. 9,360), c.30 sq mi (80 sq km), SE Greece, in the Aegean Sea. One of the Cyclades, Thíra is also known as Santorini, for St. Irene, th...

Wolfowitz, Paul Dundes

(Encyclopedia)Wolfowitz, Paul Dundes 1943–, American political figure, b. Brooklyn, N.Y., grad. Cornell (B.A. 1965), Univ. of Chicago (Ph.D. 1972). In 1966 he entered government service, and worked for the Arms C...

Northeast Passage

(Encyclopedia)Northeast Passage, water route along the northern coast of Europe and Asia, between the Atlantic and Pacific oceans. Beginning in the 15th cent., efforts were made to find a new all-water route to Ind...

cable television

(Encyclopedia)cable television, the transmission of televised images to viewers by means of coaxial cables. Cable systems receive the television signal, which is sent out over cables to individual subscribers, by a...

seasons

(Encyclopedia)CE5 The seasons are caused by the tilt of the earth's axis to the plane of its orbit about the sun. The Northern Hemisphere is tilted toward the sun in the summer and receives more direct rays than...

earthworm

(Encyclopedia)earthworm, terrestrial, cylindrical segmented worm of the class Oligochaeta. There are 2,200 earthworm species, found all over the world except in arid and arctic regions and ranging in size from 1 in...

alligator

(Encyclopedia)alligator, large aquatic reptile of the genus Alligator, in the same order as the crocodile. There are two species—a large type found in the S United States and a small type found in E China. Alliga...

hedgehog

(Encyclopedia)hedgehog, Old World insectivorous mammal of the family Erinaceidae. The spiny hedgehogs are found in Africa and Eurasia, except SE Asia. They have rounded bodies up to 13 in. (33 cm) long, very short ...