Sharp senses, athleticism, and fierce determination have helped canines to take on the world. But the real secret of their success is much more surprising: It's a story of their intimate side. It's what makes every dog, from pet pooch to wild wolf, one of the family.
Canines
Prides can be over 40 strong. So maintaining relationships isn't easy. Complicated social lives have led lions to be the cleverest of the big cats.
Big Cats
With rival lions all around, her cubs are safest under Dad's protection. Until now, they've only eaten with Mom. Today, the cubs are dining with the king.
Big Cats
It's a long and dangerous journey, from helpless cub to deadly hunter.
Big Cats