Clips from the NATURE episode "Holy Cow!" show the cow's digestive system and illustrate other naturally evolved and artificially selected traits of cattle.
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The Perfect Cow?: Video Segments: Holy Cow!
The Perfect Cow?: Lesson Overview
This video-enhanced lesson focuses on how and why humans have been so successful in selectively breeding cattle to suit our needs, while also exploring the limitations and consequences of this success. (Grades 9-12)
Dare to Care for a Grizzly Bear: Video Segments: The Good, the Bad, and the Grizzly
Segments from the NATURE episode "The Good, The Bad and the Grizzly" examine how human interaction with grizzlies has alternately endangered and restored the population, and how humans coexist with grizzlies today.
Dare to Care for a Grizzly Bear: Lesson Overview
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 Birds and the Beaks: Video Segments: Extraordinary Birds
The segments from the NATURE episode "Extraordinary Birds" show examples of the adaptations of different birds to their varying environments.
Chain Reaction: Video Segments: Earth Navigators
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.
Symbiotic Strategies: Video Segments: The Secret World of Sharks and Rays
Excerpts from NATURE examine interrelationships between sharks and other species in the marine ecology. Human impact in the ecosystem includes the shark fin industry.
Symbiotic Strategies: Lesson Overview
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)





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