Hard Times - Polar Bears - Cannibalism

Cannibalism is a phenomenon is which animals eat their own specie. This is not part of Polar Bear's nature. But in hard times even humans have eaten other humans to survive. 
In July 2010, a photojournalist Jenny E. Ross witnessed a polar bear killing and eating a cub.
Its not the first time polar bears are seen eating their own fellows but such occurrences have started to become very common.