PBS
Pbs Teachers:denali: The Wolf and the Moose: Predator and Prey Relationships
Examine the predator/prey relationship between wolves and moose in Alaska's Denali National Park and discuss how the balance of nature works between these two animals.
Curated OER
Educational Technology Clearinghouse: Clip Art Etc: William Ludlow
William Ludlow was an officer in the Corps of Engineers and a major general in the United States Army who served in the Civil War and led a scientific expedition examining the natural wonders of Yellowstone National Park.