Heather Fryer, author of After 100 Years, the National Parks Still Define Us as Americans, is a historian and at the time the article was published was a professor at Creighton University.Jon Sopel, author of After 100 Years, the National Parks Still Define Us as Americans, is a journalist for the CNN.The National Park Service was established in 1916 and as of 2016 there were more than 400 National Park localities.The National Park Service was established in 1872 with the founding of Yellowstone National Park.

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