Is this the saddest nature show ever?

Climate change forces foxes into cannibalism on Sir David's series

-  MARK JEFFERIES

ARCTIC foxes are forced to turn to cannibalism in one of the most shocking scenes ever filmed for a David Attenborough programme.

The desperate act is, Sir David explains, a consequence of climate change and a lack of food for the animal, and "only time will tell" if the species can survive in the long term.

The BBC's description of the episode says: "For mammals specialised to a life in the cold, a warming world is their greatest challenge.