Dinosaurs were the biggest, most powerful animals that ever walked the earth. Now they are all gone. How did they become extinct?--Cover p. [4].

"Everyday, countless animals and plants work together in unique ways. Although some of these symbiotic relationships are unexpected, like a large rhinoceros needing the help of a small bird, all of them are essential for the animal's survival. This reader will provide a basic introduction to a variety of symbiotic relationships, including those in which only one side benefits."--Amazon.com.

Describes the various types of animal camouflage and how it protects them from preditors.

Introduces young readers to some of the stealthiest camouflaged animals in the natural world and asks them to seek out these animals hiding in plain sight.

"A graphic nonfiction volume that introduces the cells, tissues, and organs of the human body"--