A new book chronicles changes in Wyoming over the past century. Historian and photographer Michael Amundson has retaken hundreds of photos from the early 20th century. His photos, shot in 1987-88 (while he was a student at the University of Wyoming) and again in 2007-08 are studies of pictures taken by Joseph E Stimson, a commercial photographer for the state and various railroads. The book is called “Wyoming Revisted: Rephotographing the Scenes of Joseph E. Stimson.” Amundson spoke with Wyoming Public Radio’s Micah Schweizer.