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DK Science: Energy

POTENTIAL ENERGYKINETIC ENERGYCHEMICAL ENERGYFIND OUT MOREScientists define energy as the ability to do work. Energy makes things happen. The energy in sunlight makes plants grow, the energy in…

drill, tool

(Encyclopedia) drill, tool used to create a hole, usually in some hard substance, by its rotary or hammering action. Many different tools make up the drill family. The awl is a pointed instrument…

Mesolithic period

(Encyclopedia) Mesolithic periodMesolithic periodmĕzˌəlĭthˈĭk [key] or Middle Stone Age, period in human development between the end of the Paleolithic period and the beginning of the Neolithic…

infantry

(Encyclopedia) infantry, body of soldiers who fight in an army on foot and are equipped with hand-carried weapons, in contradistinction originally to cavalry and other branches of an army. Infantry…

Selected Biographies: B

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z More Biographies Don't see the biography you're looking for? Search 30,000+ biographies Biographies by…

The Taliban

Their history and their resurgence by Laura Hayes, Borgna Brunner, and Beth Rowen Infoplease Atlas: Afghanistan Taliban ambassador to Pakistan Abdul Salam Zaeef seated in front of…

The Royal Family

The Royal FamilyThe Queen Mum Turns 100! Britain honors the country's most beloved royal by David Johnson The Queen Mother arrives at London's Guildhall for a celebratory lunch in her honor on…

Genetically Engineered Foods

"Frankenfoods" or Brave New World? The genetically engineered foods question by Kim Lundgren Skeptics claim that the so-called "Frankenstein foods" pose an insidious threat to the…

Classical Mythology: Training a Hero

Training a HeroClassical MythologyThe Labors of HeraclesTraining a HeroBeastly Chores: The First Four LaborsEven More Beastly Chores: The Second Four LaborsThe Far Corners of the Earth: The Final…