miocene

"Simple text and illustrations describe Phorusrhacos, how they lived, and how they became extinct"--Provided by publisher.

Discusses the diverse mammal population from the Oligocene and Miocene epochs, covering extinct marsupials of Australiaand North and South America, and Extinct Eutherian Mammals, with an examination of how mammals and birds gradually dominated the planet and evolved into modern forms.

Simple text and illustrations describe phorusrhacos, how they lived, and how they became extinct.