Books in LET'S FIND OUT ABOUT series

Through space exploration humans have learned a great deal about the planets, stars, and other objects in space. More than five thousand spacecraft have been launched into space to gather information since 1957. Without space travel, NASA may never have developed many of the things we take for granted today, such as cell phone cameras, CAT scans, and ski boots. This useful and interesting resource discusses the many types of manned and unmanned spacecraft, describes how a rocket works, and looks ahead to space travel's future.

Deserts, among the least appreciated and understood areas on earth, are often mistaken for barren and lifeless places. This book dispels that myth and introduces young readers to these fascinating and dynamic regions of our planet. Drawing on Britannica's thoroughly vetted resources and utilizing vivid photographs, handy vocabulary, and informative sidebars, this book answers that very question, providing students with a great primer on a landscape and environment that covers about one-third of the land surface of our planet.

Millions of people are calorie-conscious. They measure the number of estimated calories contained in their meals primarily because they wish to lose weight or avoid gaining it. But many of these people miss the big picture, the fact that regular exercise is as important as caloric discipline. This book explains the ins and outs of calories for young children. It describes the sources of calories, daily calorie needs, the meaning of "empty" calories, and the problems that can result if someone eats too many of them. Your readers will understand the need to balance caloric intake with exercise.

Children learn to ride them early in life. Weekend warriors use them for exercise. People even ride them to and from work. The bicycle is a source of entertainment, but it is also an invaluable means of transportation. Today, there are about two times more bicycles than cars worldwide. This fun and engaging resource discusses the development of the bicycle, its use throughout its two-hundred-year history, bicycle use around the globe, and modern innovations. Readers will learn the basic parts that make up a bicycle and the different reasons we ride them.