Recounts plant and animal extinctions of the past, and speculates on how humanity is disturbing the earth's delicate balance
After reviewing prevailing theories on the origins and evolution of life, and investigating the possible causes of mass extinctions from Precambrian times to the appearance of Cro-Magnon man, Erickson explores the likelihood of a new period of mass extinction, brought on not by natural phenomena but by short-sighted human activities. Thoroughly readable and thoroughly illustrated. Includes a glossary and a topical bibliography. Annotation copyright Book News, Inc. Portland, Or.