Describes urban, rural, and Union Army camp life in the northern United States during the bloodiest war in America's history.

Examines the political, cultural, and military aspects of the conflict that tragically divided the United States in the mid-nineteenth century.

Examines the Challenger disaster from a scientific and historic perspective and discusses its effect on the space shuttle program.

Discusses feudalism, the system of government based on ownership of land, as it was practiced in Europe in the Middle Ages.

Describes the physical characteristics, behavior, habitat, infancy, and future of the polar bear.

Explores the history and development of atomic theory from Democritus to Einstein and the present, presenting physics and chemistry experiments done by famous scientists and discussing nuclearpower, fusion, and fission.

A biography of the Frankish warrior and king who built a great empire in western Europe.