As the flagship of the National Park Service, Yellowstone National Park has a special place in the hearts and minds of conservationists. Thanks to the leadership of far-sighted President Ulysses S. Grant and adventurer President Theodore Roosevelt, today we can enjoy nature as it was in the early days of our nation.
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Joanne Mattern is the author of many books for children. She loves writing about sports, animals, and interesting people. Mattern lives in New York State with her family.