National Geographic Society (U.S.)

History of the Indian civilization that existed in Central America from A.D. 250 to 900.

Accomplished outdoor explorer Gregg Treinish loves adventure! Whether it's spending two years hiking the remote and perilously high Andes Mountains or coming face to face with wolverines, lynx, and bears, Gregg always knows where the action is. With gripping--and totally true--stories of incredible adventures, extreme excursions, and ultimate survival, this book will have you on the edge of your seat.

Text and color photographs show the different classes of mammals that live in North America

Dinosaurs continue to fascinate kids, and although these amazing creatures roamed the Earth ages ago, new dinosaur discoveries are still being made today! The new edition of the popular Ultimate Dinopedia includes all the latest species and is the most complete, up-to-date dinosaur reference available. Find favorites, like the fierce T-rex and the gentle Brontosaurus, plus audacious new finds, like the Anzu, Kosmoceratops, and Yi.

Ancient civilizations hid the secrets of their incredible knowledge of astronomy in their temples and palaces, built to align with the sun, on the same day, all over the world. Revealing humankind's obsession with the sun, across thousands of years and every continent, this is architectural magic on a cosmic scale.

"Get ready for a walk on the wild side in this image-packed book all about bears! kids will learn about different kinds of bears, where they live, and what they do. This Level 3 reader is written in an easy-to-grasp style to encourage the animal lovers of today and scientists of tomorrow!"--

Examines characteristics of plants, their varying habitats, different species, and the process of photosynthesis.

Contains encyclopedic entries on more than 2,500 species of animals, featuring over 1,000 color photographs, along with diagrams and range maps, and sharing facts, conservation data, and from-the-field reports from National Geographic's explorers.