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Tropical Diseases: River Blindness

River BlindnessTropical DiseasesIntroductionLeishmaniasis: The Sand Fly's BugGiardiasis: A One-Celled WonderSchistosomiasis: Snail FeverAfrican Sleeping SicknessRiver Blindness River blindness is…

Algebra: Rational Expressions

Rational Expressions Algebra Rational Expressions Simplifying Rational Expressions Combining Rational Expressions Multiplying and Dividing Rationally Encountering Complex Fractions There are…

DK Science: Immune System

INSIDE A LYMPH NODE THE LYMPHATIC SYSTEM THE IMMUNE RESPONSE FIND OUT MORE The role of the immune system is to protect the body against germs and cancers. When it detects substances that it…

DK Science: Medical Research

NANOTECHNOLOGY IN MEDICINE BIONICS COMPUTER-AIDED DRUG DESIGN FIND OUT MORE Huge resources are poured each year into studying diseases and finding new treatments. Some of the main focuses of…

DK Science: Urinary System

KIDNEY SCAN PARTS OF THE URINARY SYSTEM KIDNEY GLOMERULI FIND OUT MORE The urinary system is responsible for ridding the body of many of its waste products. It also helps to maintain a…

America's Most Endangered Places 2004

Eleven historic sites in danger of being lost forever In a report released in late May 2004, the National Trust for Historic Preservation (www.nationaltrust.org ) listed 11 historic sites across…

DK Space: Extraterrestrial Life

HOW CAN LIFE EXIST ON OTHER PLANETS? SETIFIND OUT MOREExtraterrestrial life means life beyond Earth, or alien life. No life has been found on other planets in the Solar System, but it might exist…

DK Earth: Ice

HOW DO GLACIERS FORM? WHAT ARE ICE CAPS? ICEBERG FIND OUT MOREAt the poles and on high mountains, vast areas are covered in ice—in rivers of ice called glaciers, and in layers of ice called ice…