In this video-enhanced lesson, students will identify methods for detecting and locating earthquakes, utilizing excerpts from the NATURE episode "Can Animals Predict Disaster?" (Grades 9-12)

In this video-enhanced lesson, students will learn how human beings have interacted with and impacted the lives of grizzly bears in Yellowstone Park. (Grades 9-12)

The segments from the NATURE episode "Extraordinary Birds" show examples of the adaptations of different birds to their varying environments.

Video segments from the NATURE film "Earth Navigators" feature cycles of animal migration from one part of the earth to another, including butterflies and wildebeest.

Excerpts from NATURE examine interrelationships between sharks and other species in the marine ecology. Human impact in the ecosystem includes the shark fin industry.

This video-enhanced lesson focuses on symbiosis and ecological relationships. Using sharks and marine species as examples, students will investigate the many ways that species that live in close proximity to each other might interact in an ecosystem, and will then explore the ways that ecosystems can be thrown out of balance, often as a result of human action. (Grades 9-12)

(Airs Sunday, June 20) While we are mesmerized by their likeness to our species and we have continually found uses for chimps, we never considered what they wanted or needed.

NATURE interviewed Gloria Grow, the founder of Fauna Foundation, which cares for retired chimps.

Sharing 99 percent of our DNA, chimps have been used in the study of infectious diseases, gene therapy, vaccine development, reproduction, and anatomy.

Hurricane Katrina is over but for thousands of pets left behind during the disaster, the story isn't over. Here are a few ways you can help.