Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
4.9
Points
0.5
Fiction/Nonfiction
Nonfiction
Word Count
2631
Points per Word
0.00019
Page Count
32
Points per Page
0.015625
Description
Travel to the ends of Earth and observe some of the world's toughest creatures. Find out how long whales can hold their breath, why penguins don't get frostbite, and how water bears can live through almost anything, even being cooked.