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 #7: Sunset of the Sabertooth, they had lots of questions. What was it like to live in the Ice Age? How did early humans stay warm enough to survive? Who made the first cave paintings? What happened to saber-toothed cats and woolly mammoths? 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!

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! The Ice Age is very cool…for two kids in bathing suits! Jack and Annie nearly freeze when the Magic Tree House whisks them back to the time of cave people and woolly mammoths. But nothing can stop them from having another wild adventure—not even a saber-toothed tiger! 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

"Describes the animals of the Quaternary Period, when an ice age took hold of Earth, and new animals evolved to survive the harsh weather. This period also marks when our human ancestors started to appear. Includes an Animal Families glossary, prehistory timeline, and pronunciation guides"--

Seven inch fangs made sabertooth cats a formidable ice age animal. Awesome illustrations accompany carefully leveled text about food, habitat, life cycle, and extinction, bringing sabertooth cats to life like never before.

The consummate guide to the ultimate sabertooth. Few animals spark the imagination as much as the sabertooth cat Smilodon. With their incredibly long canines, which hung like fangs past their jaws, these ferocious predators were first encountered by humans when our species entered the Americas. We can only imagine what ice age humans felt when they were confronted by a wild cat larger than a Siberian tiger. Because Smilodon skeletons are perennial favorites with museum visitors, researchers have devoted themselves to learning as much as possible about the lives of these massive cats. This volume, edited by celebrated academics, brings together a team of experts to provide a comprehensive and contemporary view of all that is known about Smilodon. The result is a detailed scientific work that will be invaluable to paleontologists, mammalogists, and serious amateur sabertooth devotees. The book • covers all major aspects of the animal's natural history, evolution, phylogenetic relationships, anatomy, biomechanics, and ecology • traces all three Smilodon species across both North and South America • brings together original, unpublished research with historical accounts of Smilodon's discovery in nineteenth-century Brazil The definitive reference on these iconic Pleistocene mammals, Smilodon will be cited by researchers for decades to come. Contributors: John P. Babiarz, Wendy J. Binder, Charles S. Churcher, Larisa R. G. DeSantis, Robert S. Feranec, Therese Flink, James L. Knight , Margaret E. Lewis, Larry D. Martin, H. Gregory McDonald, Julie A. Meachen, William C. H. Parr, Ashley R. Reynolds. Kevin L. Seymour, Christopher A. Shaw, C. S. Ware, Lars Werdelin, H. Todd Wheeler, Stephen Wroe, M. Aleksander Wysocki

Apack of adult sabertooth cats could attack and kill a huge bison in minutes. The cats most formidable feature was its terrifying saber-like teeth a pair of curving, seventeen centimetre long upper teeth with serrated inner edges like steak knives. They were as long and as sharp as the teeth of Tyrannosaurus Rex! The sabertooth has intrigued scientists for more than a century. Here is its story in vivid detail what the sabertooth looked and sounded like, how it used its deadly jaws and teeth and what may have caused their extinction!

Andrew, Judy, and Thudd have escaped the dinosaurs only to find themselves surrounded by the woolly mammoths of the Ice Age! Can they locate their lost Uncle Al and travel back to their own time before the evil Dr. Kron-Tox puts his nefarious plan into action?