Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.1
Points
2.0
Fiction/Nonfiction
Nonfiction
Word Count
10218
Points per Word
0.000196
Page Count
48
Points per Page
0.041667
Description
Readers learn about some of nature's longest-surviving species. Discover the stories of these incredible animals and find out how they help scientists piece together evolutionary history.