Explores the amazing world of the Aztec Empire, from their gods and palaces to the secrets they carved into buildings.

This book introduces children to the Atlantic Ocean, looking at its resources, famous places, and people who live along the coast. Different types of islands and the ocean floor are explored using key geography terms. Children are encouraged to use geographical skills to locate information by reading maps and interpreting simple keys. This series complements the Introducing Continents series.

This book introduces children to the Arctic Ocean, looking at both its relatively shallow continental shelf and its underwater mountains. These features are explored using key geography terms. Children are encouraged to use geographical skills to locate information by reading maps and interpreting simple keys. This series complements the Introducing Continents series.

"The Mayan Empire is remembered as one of the most progressive but violent civilizations in history. Readers will explore a variety of unsavory topics, from bloody battles and skull racks to living with the dead and human sacrifices. Features like detailed sidebars and full-color photographs and illustrations will engage readers as they discover a whole new side to the history of the ancient Americas. "--Publisher's description.

Within the world of medicine, robots are on the rise!  They are saving lives, keeping people well, and revolutionizing health care.  But is this robotic revolution all good? Join the debate

"Covering one of the most famous and studied civilizations in history, this enthralling volume will make accessible to young readers the grim secrets of this former empire, including embalming the dead, ruthless pharaohs, and the building of the pyramids. Through illustrations, full-color photographs, and gruesome sidebars, students will discover a whole new exciting side to history." -- Amazon.com.

"Earth--it's a disaster zone! For thousands of years, Earth has been battered by horrific hurricanes that rage across its surface, wreaking devastation as they move. But what causes these awesome forces of nature and where in the world are they most likely to occur? Discover the science behind hurricane horrors, the world's worst-ever hurricane disasters, and the technology that scientists are using to help prevent devastating hurricanes of the future.."--...

Learn about the classification, habitats, adaptations, food chain, life cycle, behaviors, and intelligence of walruses.