Age of Mammals

After the extinction event at the end of the Cretaceous Period, only a small number of species survived into the Cenozoic Era. Among those were small mammals who evolved to dominate life on land, including one species called homo sapiens--human beings. Engaging images and informative graphics help explain the development of life on Earth through the Cenozoic Era, while an encyclopedic-entry-style format makes the text approachable and highly browsable. Final comprehension questions encourage reflection on what readers have learned.