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Fred Thompson

Candidate for the 2008 Republican presidential nomination by Beth Rowen Fred Thompson Related Links Fred Thompson’s campaign website Profile of Tennessee…

DK Science: Skin

SKIN LAYERS HAIR FOLLICLE FINGERNAIL TEMPERATURE CONTROL FIND OUT MORE The skin, along with hair and nails, provides the body with a protective outer covering that shields it, for example,…

DK History: Polynesia

WHERE WERE POLYNESIANS FROM? WHY DID PEOPLE SET SAIL FOR POLYNESIA? HOW DID THE SETTLERS NAVIGATE? MAORISFIND OUT MOREPolynesia is a group of scattered islands in the vast Pacific Ocean. Around…

DK Nature: Vertebrates

VERTEBRATE GROUPS REPTILES BIRDS MAMMALS AMPHIBIANS FISH WHAT DOES THE SKELETON DO? HOW MANY LIMBS DO VERTEBRATES HAVE? FIND OUT MOREAll vertebrates have an inner skeleton, including a skull…

John Forbes Kerry

U.S. Senator, Massachusetts Born: Dec. 11, 1943Birthplace: Denver, Colo. Kerry was raised Catholic in a family of privilege, and spent part of his childhood living in Europe. His mother was a…

Theories of the Universe: The Particle Zoo

The Particle ZooTheories of the UniverseForces, Particles, and Some Cosmological GlueSize in the MicrocosmThe Forces You Already KnowThe Particle ZooThe Last Train to Quarkville One of the most…

muckrakers

(Encyclopedia) muckrakers, name applied to American journalists, novelists, and critics who in the first decade of the 20th cent. attempted to expose the abuses of business and the corruption in…

International Geophysical Year

(Encyclopedia) International Geophysical Year (IGY), 18-month period from July, 1957, through Dec., 1958, during a period of maximum sunspot activity, designated for cooperative study of the solar-…

barium

(Encyclopedia) bariumbariumbârˈēəm [key] [Gr.,=heavy], metallic chemical element; symbol Ba; at. no. 56; at. wt. 137.327; m.p. 725℃; b.p. 1,640℃; sp. gr. 3.5 at 20℃; valence +2. Barium is a soft,…

silicate

(Encyclopedia) silicate, chemical compound containing silicon, oxygen, and one or more metals, e.g., aluminum, barium, beryllium, calcium, iron, magnesium, manganese, potassium, sodium, or zirconium…