"There is perhaps no population of U.S. carnivores better studied than the wolves of Yellowstone. These iconic predators were reintroduced to the park in 1995, having been hunted nearly to the brink of extinction. From 1995 to 1997, 41 wild wolves from Canada and northwest Montana were released in to the park, and in the intervening decades scientists followed their every move-from predation to mating to wolf-pup play. The Yellowstone reintroduction...