Some scientists believe that Earth is heading toward a crisis - its sixth great mass extinction, where possible two-thirds of its existing species could disappear. But what do scientists know for sure? Is there a way to avoid such a crisis? Examin these questions and more by looking back into prehistory for clues as to how mass exctinctions occur, and applying those lessons for the current situation. --- from back cover of book.
Record details
ISBN:9780822575238 (lib. bdg.)
ISBN:082257523X (lib. bdg.)
Physical Description:print 111 p. : col. ill. ; 23 cm.
Publisher:Minneapolis : Twenty-First Century Books, c2008.
Book
