Watson, Richard A.

Examines the life of seventeenth-century French philosopher Rene Descartes, discussing his childhood and schooling, looking at his theory that the mind and body are distinct substances, and examining his contributions to the fields of mathematics, science, optics, medicine, physiology, and psychology.

A cave cricket, a cave rat, and a bat live contentedly in the dark until suddenly one day an explorer appears, bringing with him a beam of light.