A video captured by a visitor to Yellowstone National Park shows a bison headbutting a car during mating season, when these giant animals congregate. The vehicle and several others were unable to move ...
1. Natural History and the Twenty-First Century -- 2. Bison of the Past, Present, and Future -- 3. The Study and the Badlands Ecosystem -- 4. Social Spacing and Land Use Systems -- 5. Population ...
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