Summer visitors to Yellowstone depart after watching Old Faithful erupt for a few minutes. We all passionately love Yellowstone; it's a fact. But does our experience seeing the world's most famous geyser erupt change how we think about nature? A human-built industrial infrastructure encircles the geyser itself and the physical human footprint dwarfs it in size. How is this a metaphor for the kinds of things Popkin addresses in his new book? Photo courtesy Jacob W. Frank/NPS