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Roller Coasters

From the Russian countryside to Disneyland by Marcus McGraw and Catherine McNiff Editor's Picks Alpengeist Busch Gardens, Williamsburg, VA Alpengeist is one of the world's fastest…

Geometry: Transformations

TransformationsGeometryTransformationsIsometriesDilationsSymmetry There is very little in our world that is static. Living things like to move. I remember thinking how great it would be to move…

Daniels, Josephus

(Encyclopedia) Daniels, Josephus, 1862–1948, American statesman, newspaper editor, and author, b. Washington, N.C. He became editor of the Raleigh State Chronicle in 1885 (he was admitted to the bar…

Geometry: Congruent Triangles

Congruent TrianglesGeometryCongruent TrianglesCPOCTACThe Big FiveThe SAS PostulateThe ASA PostulateThe AAS TheoremProving Segments and Angles Are CongruentProving Lines Are Parallel It's not…

paleomagnetism

(Encyclopedia) paleomagnetism, study of the intensity and orientation of the earth's magnetic field as preserved in the magnetic orientation of certain minerals found in rocks formed throughout…

Porteous, John

(Encyclopedia) Porteous, JohnPorteous, Johnpôrˈtēəs [key], d. 1736, British soldier. He was captain of the Edinburgh town guard at the execution (1736) of Andrew Wilson, a smuggler. When the crowd,…

San Gabriel Mountains

(Encyclopedia) San Gabriel Mountains, S Calif., E and NE of Los Angeles, running c.50 mi (80 km) westward from Cajon Pass. Mt. San Antonio, also known as Mt. Baldy (10,080 ft/3,072 m), is the highest…