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monitor, in zoology

(Encyclopedia) monitor, any of various, mostly tropical lizards. A monitor lizard has a heavy body, long head and neck, long tail that comes to a whiplike end, and strong legs with sharp claws. Its…

Dana, James Dwight

(Encyclopedia) Dana, James Dwight, 1813–95, American geologist, mineralogist, and naturalist, b. Utica, N.Y., grad. Yale, 1833. His studies of the S Pacific, NW United States, Europe, and elsewhere…

Cunard, Sir Samuel

(Encyclopedia) Cunard, Sir SamuelCunard, Sir Samuelky&oomacr;närdˈ [key], 1787–1865, Canadian pioneer of regular transatlantic steam navigation, b. Halifax, N.S. The son of a United Empire…

Pestilence

Pestilence is contagious disease that spreads out of control, killing many people. Here are examples of some of the worst epidemics around the world. AIDS…

Susan B. Anthony Dollar

Library of Congress Susan B. Anthony (1820-1906) is the first woman to appear on U.S. coinage. Anthony worked for nearly 70 years to bring suffrage (the right to vote) to women in the United…

glacial periods

(Encyclopedia) glacial periods, times during which large portions of the earth's surface were covered with thick glacial ice sheets. In the Pleistocene epoch, in the Carboniferous and Permian periods…

DK Science: Era Of The Dinosaurs

Geological timescaleTriassic period: 250–200 million years agoJurassic period: 200–145 million years agoCretaceous period: 145–65 million years agoDinosaurs roamed the planet for about 165 million…

DK Earth: Islands

WHAT IS A CONTINENTAL ISLAND? HOW ARE VOLCANIC ISLANDS FORMED? HOW DO CORAL REEFS FORM? FORMATION OF A CORAL ATOLLFIND OUT MOREAn island is an area of land smaller than a continent and entirely…

John ARCHER, Congress, MD (1741-1810)

ARCHER, John, (father of Stevenson Archer [1786-1848] and grandfather of Stevenson Archer [1827-1898]), a Representative from Maryland; born near Churchville, Harford (then Baltimore) County,…