Using simple text, maps, and dramatic photographs, this book introduces readers to Mars, relying on the latest scientific findings from NASA and other space agencies. Features include Mars' physical measurements, its geology, atmosphere, gravity, orbit, and climate. Also covered are geographical wonders such as Valles Marineris (the largest canyon in the solar system) and Olympus Mons (the largest volcano), as well as major craters, icy poles, and...

Discusses the history of this national park, its geological features, plant and animal life, dangers in the park, and efforts to preserve it

A pictorial history of developments in transportation over the last millennium

Joins the Lewis and Clark Expedition in the spring of 1806 as its members leave Fort Clatsop and return home, then continue their separate lives. Includes highlights and directions to historical points of interest

An introduction to the United States Navy that provides information on its history, training, equipment, responsibilities in wartime and peacetime, and other related topics.