Seymour brings cosmology and astrology together to determine the relationship between living organisms and their physical environment. He discusses the effects of seasonal weather changes and the resulting temperature responses in animals and humans. Early humans, he posits, may have used planetary movement as well as the geomagnetic field of the earth for navigational purposes on land and sea. As people moved from living in small bands to larger groups, mechanical means of time-keeping such as calendars and clocks became necessary. Later, transportation developments also caused a need for the uniformity of time. Seymour also debates the theories of Michel Gauquelin and Suitbert Ertel, both of whom studied the effects of planetary positions at the time of an individual's birth and their correlation to human behavior. This is an intriguing if inconclusive book by a prominent British astronomer. An optional purchase.-- Lisa Wise, Three Rivers Lib. Sys., Glenwood Springs, Col.