This zoo is breeding hope for endangered species

A little joey pokes a front paw and then its head out of its mother's pouch. Dave White, a zookeeper at Chester Zoo, in England, points up to the mother perched on a branch and beams with pride. He has been watching the baby tree kangaroo develop since it was born the size of a jellybean -- first tracking its growth with an endoscope camera placed inside the pouch, and now, seeing the 7-month-old emerge.