Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.6
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
3153
Points per Word
0.000317
Page Count
48
Points per Page
0.020833
Description
From deep within the human body to distant nebulae in outer space, there are worlds all around us that are smaller, faster, and farther than the unaided eye can see. In these thirty-six amazing images, you can see the invisible.