Two narratives -- the life cycle of a mother walrus and her calf, and the life of a polar bear and her cubs -- are used to illustrate the harsh realities of existence in the Arctic.

Siberian gulag escapees travel four thousand miles by foot to freedom in India.

Fifty years ago there were close to half-a-million lions in Africa. Today there are around 20,000. To make matters worse, lions, unlike elephants, which are far more numerous, have virtually no protection under government mandate ...

In the Antarctic, every March since the beginning of time, the quest begins to find the perfect mate and start a family.