William Gibson ParkerWilliam Gibson Parker is a geologist, vertebrate paleontologist, and historian who has worked at the park since 2001. With degrees in geology from Northern Arizona University and the University of Texas at Austin, he has published more than 60 paperson the park geology and paleontology. He also studies the park's history, in particular how infrastructure has changed through time and affected the park visitors. Almost all of the photographs in this book come from the park's extensive archive as well as the author's personal collection. Read More Read Less