If you’ve ever been lucky enough to visit Yellowstone National Park, you’ll understand just how strikingly beautiful the place is. It’s something of a paradise, a rare part of the United States that hasn’t been left scarred and altered by industrial development. The thing is, though, the history of this place is more complicated than many of us realize. Yellowstone has a dark secret – and everyone needs to know about it. Photo credit: Archive Photos/Getty Image