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DK Science: Ceramics

PORCELAINMAKING CERAMICSBIOGRAPHY: JOSIAH WEDGWOOD English, 1730-1795ADVANCED CERAMICSFIND OUT MOREThe word ceramic comes from an ancient Greek word for “burned earth”. Ceramics are made by…

Theories of the Universe: The Important Part

The Important Part Theories of the Universe It's All Held Together with Strings A Brief History of String Theory The Important Part The Second Requirement, Extra Dimensions How Many…

Tuberculosis: Tuberculosis: Airborne Nightmare

Tuberculosis: Airborne NightmareTuberculosisIntroductionTuberculosis: Airborne NightmareTreating TBTB Is a Global Peril TB-causing bacteria is passed from person to person through the air when…

Tuberculosis: Tuberculosis: Airborne Nightmare

Tuberculosis: Airborne NightmareTuberculosisIntroductionTuberculosis: Airborne NightmareTreating TBTB Is a Global Peril TB-causing bacteria is passed from person to person through the air when…

Classical Mythology: Dad, Can I Borrow Your Car?

Dad, Can I Borrow Your Car?Classical MythologyNot in Our Stars: Tragic Heroes and Their FatesSwitchblade SistersMutual Mistrust: The High Cost of JealousyThe Limits of CraftsmanshipDad, Can I Borrow…

calcium

(Encyclopedia) calciumcalciumkălˈsēəm [key] [Lat.,=lime], metallic chemical element; symbol Ca; at. no. 20; at. wt. 40.078; m.p. about 839℃; b.p. 1,484℃; sp. gr. 1.55 at 20℃; valence +2. Calcium is a…

phosphorus

(Encyclopedia) phosphorusphosphorusfŏsˈfərəs [key] [Gr.,=light-bearing], nonmetallic chemical element; symbol P; at. no. 15; at. wt. 30.97376; m.p. 44.1℃; b.p. about 280℃; sp. gr. 1.82 at 20℃;…

fan

(Encyclopedia) fan, device for agitating air or gases or moving them from one location to another. Mechanical fans with revolving blades are used for ventilation, in manufacturing, in winnowing grain…