Discusses prehistoric crocodiles, including the discovery of SuperCroc in the Sahara Desert, and the lifestyles, habitats, and conservation of modern crocodiles.

Toward the end of the Age of Dinosaurs, during a time known as the Late Cretaceous, a new type of giant predator appeared along the southern coasts of North America. It was a huge species of crocodylian called Deinosuchus. Neither a crocodile nor an alligator, it was an ancestor of both modern groups; it reached weights of many tons and it had some features unique to its own species. Average-sized individuals were bigger than the carnivorous dinosaurs with which they co-existed; the largest specimens were the size of a T-rex. King of the Crocodylians, the biography of these giant beasts, tells the long history of their discovery and reports on new research about their makeup. The book also deals with the ancient life and geology of the coastal areas where Deinosuchus thrived, its competitors, and its prey, which probably included carnivorous dinosaurs. There is also detailed discussion of the methods used to determine the size of these giant animals, the dating of the fossils, the nature of their living environments, and how we know who ate whom 80 million years ago.

All of the animals are afraid of the Selfish Crocodile - he never let's them into his river, and he's always so snappy! And so when the Selfish Crocodile finds himself in terrible pain, no-one wants to help him - after all, what if he gobbles them up? But, to everyone's surprise, there is one animal in the forest who is willing to help . . . A brilliant tale of friendship, The Selfish Crocodile has become a picture book classic.

An on-location lesson in museums and dinosaur digs shows how paleontologists perform their fascinating unearthing of the past. National Geographic supports K-12 educators with ELA Common Core Resources. Visit www.natgeoed.org/commoncore for more information.

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better. Track the facts with Jack and Annie!! When Jack and Annie got back from their adventure in Magic Tree House Merlin Mission #17: A Crazy Day with Cobras, they had lots of questions. Can snakes really be charmed? What reptile has the deadliest venom? What do Komodo dragons eat? How do you tell alligators and crocodiles apart? Find out the answers to these questions and more as Jack and Annie track the facts. Filled with up-to-date information, photos, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discovered in their favorite Magic Tree House adventures. And teachers can use Fact Trackers alongside their Magic Tree House fiction companions to meet common core text pairing needs. Did you know that there’s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!

Alligators and crocodiles are among the oldest largest and most advanced reptiles on earth. Lurid accounts of encounters between humans and crocodilians have fascinated and horrified people over the centuries, and some truly monstrous creatures exist today.

Did you know there were massive animals that existed before and after the dinosaurs? Now, just imagine if they appeared in the modern world ... Super-realistic illustrations catapult these mighty creatures into 21st-century settings. Juxtaposed against modern day scenes - bringing to life how awesome these incredible animals were.

A paleoartist is an illustrator who specialises in the science and art of reconstructing ancient animals and their world. In Dinosaur Art, ten of the top contemporary paleoartists reveal a selection of their work and exclusively discuss their working methods and distinct styles. Filled with breathtaking artwork - some never before seen - and cutting edge paleontology, this is a treasure trove for dinosaur enthusiasts, art lovers and budding illustrators.

Follow Paul Sereno's 1997 excavation in the desert, revealing facts about this giant prehistoric croc that lived and fought among the dinosaurs.