Describes animals that have disappeared. This book lets you find out all about alien species and mass extinctions; animals that seemed to come back from the dead; and, which animal went extinct when a tree fell on the very last one in the whole world.

Describes animals that have disappeared. This book lets you find out all about alien species and mass extinctions; animals that seemed to come back from the dead; and, which animal went extinct when a tree fell on the very last one in the whole world.