How could such a cute, exotic animal remain unknown to scientists for so long? Olinguitos live in cool, humid cloud forests in the mountains. For many years, scientists mistook their pelts and skeletons for olingos, a related mammal. But in the early 2000s, Kristofer Helgen noticed something different about some olingos. He suspects they might be a separate mammal species--a rare discovery. If they were, did they still exist in the wild? And where...