The Polar Bear Mothers can go up to great limits to protect and ensure survival of her cub. From finding food to thwarting any other dangers, sometimes the mothers go without eating for days. This is just one of the species that is endangered by human activities.   The changes in sea temperatures, loss of icy polar habitats, glacier melting are results of our man-made global warming. The polar bears are losing their home, finding it even harder to hunt and gather for food. The time to act is…