"This book traces the life of Alexander Graham Bell, from his early childhood and education through his sources of inspiration and challenges faced, early successes, and the invention for which he is best known: the telephone. A timeline at the end of the book summarizes key milestones and achievements of Bell's life."--

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.

Learn all about what makes great literary non-fiction. This book looks at what it is, examples in the real world, how to use and enjoy it, and how you can write your own.