Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
5.6
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
7490
Points per Word
0.000134
Page Count
108
Points per Page
0.009259
Series
What Was.../What Is...?
Description
This book provides an overview of the world as it was when glaciers covered Earth and long-extinct creatures such as woolly mammoths and saber-toothed cats battled to survive.