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sandstone

(Encyclopedia)sandstone, sedimentary rock formed by the cementing together of grains of sand. The usual cementing material in sandstone is calcium carbonate, iron oxides, or silica, and the hardness of sandstone va...

squirrel

(Encyclopedia)squirrel, name for small or medium-sized rodents of the family Sciuridae, found throughout the world except in Australia, Madagascar, and the polar regions; it is applied especially to the tree-living...

Graeae

(Encyclopedia)Graeae or Graiae both: grēˈī [key], in Greek mythology, daughters of Ceto and Phorcus, called Deino, Enyo, and Pemphredo. The personifications of old age, they were born with gray hair and only one...

Lee, George Washington Custis

(Encyclopedia)Lee, George Washington Custis, 1832–1913, Confederate general in the American Civil War, b. Fort Monroe, Va.; eldest son of Robert E. Lee. He served in the Corps of Engineers until May, 1861, when h...

Becker, Boris

(Encyclopedia)Becker, Boris, 1967–, German tennis player, b. Leimen, West Germany (now Germany). Noted for his powerful, often acrobatic serve-and-volley game, he gained notice in 1985 when, at 17, he became the ...

Budge, Don

(Encyclopedia)Budge, Don (John Donald Budge), 1915–2000, American tennis player, b. Oakland, Calif. A powerful, consistent player, Budge was the first person to capture the sport's grand slam, winning the Austral...

Hill, Daniel Harvey

(Encyclopedia)Hill, Daniel Harvey, 1821–89, Confederate general in the American Civil War, b. York District, S.C. He served in the Mexican War but resigned from the army in 1849. He was professor of mathematics a...

duiker

(Encyclopedia)duiker dīˈkər, dāˈ– [key], name for members of a group of small, light antelopes, found in thick brush and forest over most of Africa. All stand under 25 in. (64 cm) high at the shoulder. They ...

harbor seal

(Encyclopedia)harbor seal, most commonly seen seal of the Northern Hemisphere, Phoca vitulina. Harbor seals are found along coasts and in sheltered bays and harbors of North America, Europe, and NE Asia. They range...

Chesapeake and Delaware Canal

(Encyclopedia)Chesapeake and Delaware Canal, sea-level canal, 19 mi (31 km) long, 250 ft (76 m) wide, and 27 ft (8.2 m) deep, connecting the head of Chesapeake Bay with the Delaware River. Built in 1824–29, the c...