Centennial Mountains Rock Lakes National Wildlife Refuge, state and private land, and part of a USDA Agricultural Research Station for sheep. Around 326 vascular plant species have been identified in the Centennials, an unusual plant diversity for the Yellowstone region. Grizzly bears inhabit the area, as nearly all species indigenous to the Greater Yellowstone Ecosystem are present. The north slope of the Centennials rises abruptly 3,000 feet above the Centennial Valley. Centennial Mountains The Centennial Mountains are the southernmost sub-range of the Bitterroot Range in the United States states of Idaho and Montana. The Centennial Mountains include the Western and Eastern Centennial
Animal Liberation (book) where the benefit (in terms of improved medical treatment, etc.) outweighs the harm done to the animals used. "Animal Liberation" is one of the most widely-read books by a moral philosopher. Activist Ingrid Newkirk wrote of "Animal Liberation", "It forever changed the conversation about our treatment of animals. It made people—myself included—change what we ate, what we wore, and how we perceived animals." Other activists who claim that their attitudes to animals changed after reading the book include Peter Tatchell and Matt Ball. Singer has expressed regret that the book did not have more impact. In September 1999, he was