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acoustics

(Encyclopedia) acousticsacousticsək&oomacr;ˈstĭks [key] [Gr.,=the facts about hearing], the science of sound, including its production, propagation, and effects. Various branches of acoustics…

People in the World

“When in Rome, do as the Romans do” is a famous saying about customs. But what exactly do the Romans and other people do that is so different? Where do women wear rings in their noses to show they…

DK History: Mongols

WHAT WAS SPECIAL ABOUT MONGOL ARMIES? WHO WANTED TO RULE THE WORLD? BIOGRAPHY: GENGHIS KHAN r. 1206–1227 FIND OUT MOREThe Mongols were nomadic tribes from the steppes, or grasslands, of central…

Alexander CAMPBELL, Congress, OH (1779-1857)

Senate Years of Service: 1809-1813Party: Democratic RepublicanCAMPBELL, Alexander, a Senator from Ohio; born in Frederick County, Va., in 1779; moved with his parents to east Tennessee and…

Henry Kirke PORTER, Congress, PA (1840-1921)

PORTER, Henry Kirke, a Representative from Pennsylvania; born in Concord, N.H., November 24, 1840; attended public and private schools and was prepared for college at the New London Academy,…

Triple Crown Races—2008

Kentucky Derby (Churchill Downs, Louisville, Ky., May 3, 2008.) Purse: $2,000,000. Distance: 11/4 mi. Order of finish: 1. Big Brown (Borel), mutuel…