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DK Science: Mammals

CLASS: MAMMALIADIVING PLATYPUSLEAPING DOLPHINFIND OUT MOREAll mammals are endothermic (warm-blooded), have some fur or hair on their body, and feed their young milk. They have a bony skeleton…

DK Science: Medicinal Plants

GATHERING BARKMEDICINAL JUICEFROM PLANTS TO MEDICINESFIND OUT MOREMany plants produce special substances in their roots, leaves, flowers, or seeds that help them to survive. For example, some…

DK Science: Solids

CHANGING SHAPESHAPE MEMORY METALStretchSTRENGTHCRYSTALLINE STRUCTUREFIND OUT MORESolids are one of the three states of matter and, unlike liquids or gases, they have a definite shape that is not…

DK Science & Technology: Elements

HOW MANY ELEMENTS ARE THERE? WHICH ARE THE MOST COMMON ELEMENTS? METALSPERIODIC TABLEFIND OUT MOREA substance made up of one kind of atom is an element. Gold is an element because it only contains…

All About Ozone

Source: The Environmental Protection AgencyI. The Ozone Layer The Earth's atmosphere is divided into several layers. The lowest region, the troposphere, extends from the Earth's surface up to about…

War Poems

  Meditations on War   If these men do not die well, it will be a black matter for the king that led them to it . . .   Read these renowned poets' thoughts on war, with lines ranging from…

Selected Biographies: U

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 Category Arts and…

America's Most Endangered Places 2009

Mount Taylor in Grants, New Mexico is among American sites most at risk by Elizabeth Olson America's Most Endangered Places America's Most Endangered Places 2007America's Most Endangered Places…