A majestic creature of the far north, the polar bear is the world's largest terrestrial carnivore.
Polar bears' amazing adaptations to life in the rugged Arctic environment and dependence on sea ice make them so impressive, and yet so vulnerable.
This is why polar bears help us gain an understanding of what is happening throughout the Arctic, as a polar bear at risk may signal something is wrong elsewhere in the arctic marine ecosystem.
All recent indicators show that sea ice in the Arctic is melting at an alarming rate, a problem that needs to be addressed immediately if polar bears, and other species unique to the region, are to survive.
352 - 680 kg
2 - 3 m
20-25,000 polar bears worldwide