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DK Science: Pollution

AIR POLLUTIONGREENHOUSE EFFECTACID RAINACCIDENTAL POLLUTIONFIND OUT MOREPollution is waste that we put into the environment. It can harm plants and animals, including humans. Pollution comes…

Advanced-Level Science Projects: Chemistry

ChemistryAdvanced-Level Science ProjectsChemistryWhat's in a Color?Copper Magic Which Metal Corrodes the Fastest? Did you ever have a shiny new bike that over time got to look not so shiny and…

June 2007

Here are the key news events of the month organized into three categories: World News, U.S. News, and Business, Society, and Science News. World Former…

Apostrophe

Indicates the possessive case of singular and plural nouns, indefinite pronouns, and surnames combined with designations such as Jr., Sr., and II: my sister's husband, my three sisters' husbands,…

Archbishop Paulos Faraj Rahho Biography

Iraqi ArchbishopDied: body found on March 13, 2008 (Iraq) Best Known as: member of the Chaldean Church who was kidnapped in 2008 Archbishop Rahho was kidnapped in…

Irving Bluestone Biography

union negotiatorDied: Nov. 17, 2007 (Brookline, Massachusetts) Best Known as: Chief negotiator for General Motors employees Chief negotiator for General Motors…

Teddy Pendergrass Biography

rhythm and blues singerBorn: March 26, 1950 Died: January 13, 2010 (Bryn Mawr, Pa.) Best Known as: baritone rhythm and blues singer Teddy Pendergrass was known…

Henry Timken

Born: 1831Birthplace: Bremen, Germany Tapered roller bearings—The bearings that existed in the late 19th century worked well at reducing friction but ran into problems when wheels had to bear heavy…

Fantastic Fantasy Novels

  What to Read While You're Waiting for the Next Harry Potter: Favorites from Other Fantastic Series   by Holly Hartman Harry Potter wasn't the first child to…

DK Science: Pack Hunters

Trapped in a quagmireFamily feastingTactics of modern huntersJust as modern meat-eating animals such as lions combine forces to pull down animals larger than themselves, many flesh-eating theropods…