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World War I Timeline

Imperial, territorial, and economic rivalries led to the “Great War” between the Central Powers and the Allies. About 10 million combatants killed, 20 million wounded. These are key dates in the war…

Homework Center: U.S. History

Subjects » Geography » History » Language Arts » Mathematics » Science » Social Studies Homework Skills Writing | Research Speaking & Listening Studying Reference Sources…

Washington, D.C. Memorials and Landmarks

Arlington National Cemetery Arlington National Cemetery occupies 612 acres in Virginia on the Potomac River, directly opposite Washington. In 1864, Arlington became a military…

June 2009 Current Events: World News

U.S. News | Business/Science News Here are the key events in world news for the month of June 2009. Air France Plane Vanishes (June 1): In the worst aviation disaster since…

Homework Center: Frequently Asked Questions

Homework Center Frequently Asked Questions Subjects » Geography » History » Language Arts » Mathematics » Science » Social StudiesSkillsWriting | ResearchSpeaking &…

DK Science: Food Plants

PADDY FIELDS IN CHINAVERSATILE FOOD PLANTLIFE CYCLE OF RICECOMBINE HARVESTERS GATHER WHEATCROP ROTATIONSELECTIVE BREEDINGBIOGRAPHY: NORMAN BORLAUG American, 1914-PESTSFIND OUT MOREFood chains begin…

Landmarks of Boston

by Dana J. Quigley photos by Carol M. Highsmith No city in the U.S. is richer in historical associations than Boston, and no city has retained more of its original buildings as memorials to…

DK Society & Beliefs: Culture

DO ALL MEMBERS OF A SOCIETY SHARE ONE CULTURE? IS THERE A GLOBAL CULTURE? DO CULTURES CHANGE? HOW DO WE LEARN A CULTURE? TRADITIONLANGUAGESUBCULTUREFIND OUT MORECulture is made up of all the…

DK Science & Technology: Genetic Engineering

WHAT IS GENETIC VARIATION? HOW CAN WE MANIPULATE GENES? GM FOODCLONESSTEM CELLSFIND OUT MOREGenetic engineering is the manipulation of genes of living things. Scientists can now insert genes from…