When wolves were eliminated from Yellowstone National Park the natural system was out of balance. Shows the return of the wolves to the park and the natural balance being restored.

Describes how bald eagles have recovered from the threat of extinction, how they raise their families, and why they are the national bird of the United States.

Describes the physical characteristics, behavior, reproduction, and habitat of frogs that live in the rain forest.

"A dog's nose is 300 times more powerful than a human nose, so it's no wonder that dogs use their incredibly advanced sense of smell to do some very important jobs. Dorothy Hinshaw Patent explores the various ways specific dogs have put their super sniffing ability to use: from bedbug sniffers to explosive detectors to life-saving allergy detectors...and more. This dynamic photo-essay includes first-hand accounts from the people who work closely with...

Retraces the Lewis and Clark journey and blends their observations of previously unknown animals with modern information about those same animals.

Explains the forces that have created the geological features on the earth's surface.

"A stunning addition to the Scientists in the Field series that explores mercury pollution found in the rivers and streams of Western Montana that might cause harm to humans--and the extinction of the entire osprey species."--

Describes the physical characteristics, behavior, and usefulness of these birds, which have lived with people since prehistoric times.

Provides an overview of coral reefs as ecosystems, describing different types of corals and how they reproduce and discussing the variety of fishes and other animals that depend on coral reefs to sustain them.