A founding father of the conservation movement in the United States, John Muir was born in Scotland and emigrated to Wisconsin when he was eleven. His boyhood passion for the wilderness of North America matured into a pathbreaking career, which included such triumphs as working with President Theodore Roosevelt to establish the National Parks Service, creating the first ever national park, Yosemite, and founding the Sierra Club. For today's eco-conscious kids, John Muir has become a hero.