THERE WOULD BE NO TEST holes. Just descent into an ancient cavern. The surgical removal of two wolves. Then a few more days of spring break committed to showing my students ordinary evidence of Yellowstone’s past. Half of the assemblage understood what I was actually saying. The other half were equally riveted since they thought I was about to discover a prehistoric wonder like the one that had recently hit the national news. “Where?” my father demanded. His scent was greedy and I really could have done without his presence. But I’d asked him for a favor, so I couldn’t send him away. Instead, I settled my brain and took a moment to reorganize the data I’d compiled while riding within the cave girl and her offspring. That ancient map had been familiar. The pattern of lines and symbols r

