Jen Green

How do we know that the Sun is at the center of our solar system? This scientific theory is know as heliocentrism. This fascinating book looks at the historical controversies that surround the theory of heliocentrism and tells the stories of the scientists who worked on the theory. It also examines how the theory of heliocentrism was arrived at, how it was tested, and what impact the theory has had on our understanding of science today.

"In this book, young readers will learn about the diet, life cycle, behavior and habitat of great white sharks."--

Provides readers with interesting facts about trees and introduces the concept of forest ecology. Includes glossary.

Explores the world of mammals, including their anatomy, where they live, what they eat, and how they communicate.

"Discusses the life of bears and profiles different types of bears, along with providing facts and records on bears"--Provided by publisher.

In graphic novel format, presents an adaptation of Dickens' tale of an orphan growing up in Victorian England.

Describes the rescue teams which battle earthquakes, avalanches, landslides, mudslides, and environmental damage, the technology used to predict and track such disasters, and the measures taken to prevent damage to human and natural life.

Examines the physical characteristics, behavior, and life cycle of butterflies, describes the different kinds, and discusses their endangered status.