This series is the definitive collection of informational books for intermediate-grade readers. With 20 to 30 new titles every year, Watts Library "TM" spans all subjects in the science and social studies curricula -- including animals, space, American Indians, U.S. history, geography, cutting-edge sports, and more! Space exploration is no longer new, but new discoveries are being made every day. This series explores those discoveries, revealing...

Discusses the history of human ideas about Mars, its geology and moons, missions to the Red Planet, and the possibility of life on Mars.

Presents a biography on twentieth-century American scientist and astronomer Carl Sagan and explores his work on planetary explorations and other scientific breakthroughs credited to him.

Describes the wide array of different types of satellites that have been placed in orbit since the launching of Sputnik I in 1957 and the varied functions they perform, from communications and weather forecasting to astronomy and spy tasks.

Traces the history of canals and canal building in America, from the first American canals to the building of the Panama Canal and the recent work done on the Illinois Waterway.

Surveys the history of the National Aeronautics and Space Administration, describing the major space craft and missions launched.