From Cuddly to Tragedy -- Asiatic Black Bear, Japan

Wildlife photographer Hiroshi Yokota has closely observed Asiatic black bears in the Ashio Mountains north of Tokyo for 30 years. He leads the Darwin team deep into the forest in search of his favorite cub he's affectionately named Jiro. Over the span of several years we follow many phases of Jiro's life, not all of which end happily. It's a tale of nature laid bare: breathtaking, unforgiving, and cruel. Through it all, Jiro's resilience and Yokota's devotion provide valuable lessons for us all.