Learn more about extinction and how it affects the world around you.

The past is full of mysterious events. How did ancient people build pyramids. What is Stonehenge for? Maybe the explanations for these events are simple ... or maybe there's something strange going on. Explore history's mysteries through closely level text, dynamic imagery, and visual infographics.

Few topics are as exciting to young readers as dinosaurs. They learn the most difficult names and minute details just to satisfy their abundant curiosity. This motivating volume about the mighty reptiles answers the big question that budding paleontologists have: Where did the dinosaurs go? Readers will discover the fascinating answers their enquiring inquiring minds seek through comprehensible text, colorful images, and detailed illustrations.

What happened to the dinosaurs? For millions of years these fantastic creatures roamed our planet. Then, suddenly, they all disappeared. Scientists wonder why. What could have caused this huge extinction 65 million years ago? In this enlarged edition, distinguished writer Franklyn M. Branley and award-winning artist Marc Simont provide the perfect introduction to an always fascinating subject - the disappearance of the dinosaurs. Outstanding Science Trade Books for Children 1989 (NSTA/CBC)

Some 250 million years ago, the earth suffered the greatest biological crisis in its history. Around 95 percent of all living species died out—a global catastrophe far greater than the dinosaurs' demise 185 million years later. How this happened remains a mystery. But there are many competing theories. Some blame huge volcanic eruptions that covered an area as large as the continental United States; others argue for sudden changes in ocean levels and chemistry, including burps of methane gas; and still others cite the impact of an extraterrestrial object, similar to what caused the dinosaurs' extinction. Extinction is a paleontological mystery story. Here, the world's foremost authority on the subject provides a fascinating overview of the evidence for and against a whole host of hypotheses concerning this cataclysmic event that unfolded at the end of the Permian. After setting the scene, Erwin introduces the suite of possible perpetrators and the types of evidence paleontologists seek. He then unveils the actual evidence--moving from China, where much of the best evidence is found; to a look at extinction in the oceans; to the extraordinary fossil animals of the Karoo Desert of South Africa. Erwin reviews the evidence for each of the hypotheses before presenting his own view of what happened. Although full recovery took tens of millions of years, this most massive of mass extinctions was a powerful creative force, setting the stage for the development of the world as we know it today. In a new preface, Douglas Erwin assesses developments in the field since the book's initial publication.

From the king of the dinosaurs the Tyrannosaurus Rex to the formidable Brachiosaurus, dinosaurs are a perennial favorite of children of all ages. The 14 stunning images in this bookazine reveal the dinosaurs as you have never seen them before. Every poster is accompanied by the facts and figures surrounding the individual dinosaurs, including information about their habitat, food and predators. Featuring a dinosaur family tree and scale pictures to help compare the size and dominance of these incredible beasts, this entertaining and educational collection will captivate and amaze.