Learn about the plight of the polar bears, who are living on borrowed time as their habitat changes and food sources become rare.

Polar bears are living on borrowed time. They are the descendants of grizzlies, who long ago evolved to live and hunt on the frozen ice of the Arctic, eating a specialized diet of seal meat. But the winters have become increasingly warmer, the ice is disappearing and raising a family becomes a much more difficult proposition when hunting time is short and food is scarce. Grizzlies, on the other hand, are masters at living off the land, making a meal from a wide variety of foods - meats, seeds, berries, insects, fruit and honey. Their world is bountiful and expanding northward, converging with what once was the icy domain of the polar bear. As the two worlds meet, are the polar bears fated to become grizzlies once again?