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DK Science: Populations

FAMILY MEMBERSUNITED PROTECTIONCOLONIAL ORGANIZATIONFIND OUT MOREAnimals of the same animal species, living in the same area, and interbreeding with one another, are referred to as a population…

DK Science: Prehistoric Life

FOSSIL DRAGONFLYELASMOSAURUSERAS OF LIFE ON EARTHDINOSAURSFIND OUT MORESince life began, more than 3.5 billion years ago, evolution has produced an enormous variety of living things. The…

DK Science: Reproduction

CROCODILE EGGSROLE REVERSALASEXUAL BUDDINGLIVE YOUNGFERTILIZATIONFIND OUT MOREAnimals reproduce in one of two ways. In asexual reproduction, animals produce young, which are identical to…

DK Science: Reptiles

POISONOUS FANGSKOMODO DRAGONCLASS: REPTILIAFIND OUT MOREReptiles are ectothermic (cold-blooded) animals. They cannot generate their own body heat and many bask in the sun to get warm. Tough…

DK Science: Senses

ON THE ALERTTOUCH-SENSITIVE FEELERSVISIONHEARINGSMELLFIND OUT MORETo find food, mate, avoid danger, and communicate, animals rely on information gathered by their senses. Information is…

DK Science: Sponges

PHYLUM: PORIFERACALCAREOUS SPONGESTUBE SPONGEFIND OUT MOREThe simplest of all animals, most sponges live in colonies (groups) that are little more than units of cells organized into two layers…

DK Science: Worms

TYPES OF WORMFLATWORMSROUNDWORMSSEGMENTED WORMSFIND OUT MOREThere are about one million species of worm, living in a wide range of habitats. They have a long, thin body, and have no legs. Many…

Birds as Symbols and Omens

From ancient times to the present, certain birds have been considered both symbols and forecasters of events. These eight birds, from every part of the world, have been especially important.…

The World's Favorite Pets

Household pets are common in America, Europe, and Asia. Australian Aborigines capture dingo (wild dog) puppies and raise them for a…