Describes the physical characteristics, diet, natural habitat, and life cycle of polar bears.

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

Military Working Dogs jump out of airplanes, storm beaches, attack on command, and comfort their handlers with a lick and a warm snuggle when the battle's over.

"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...

Tells how a golden retriever is trained as a service dog, to help someone who has trouble moving their arms or legs, and later as a guide dog for a man who cannot see.

Describes the journey of Lewis and Clark through the western United States, focusing on the plants they cataloged, their uses for food and medicine, and the plant lore of Native American people.

"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."--

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.