Polar bears are at risk of starvation in longer ice-free seasons in the Arctic, despite their ability to adapt their diet and behaviour, scientists have warned.Climate change is increasing the time some areas of the Arctic are ice-free each year, forcing polar bears - which are specialised to use the ice to hunt their preferred food of seals - to spend longer on land in those regions.

Polar bears are at risk of starvation in longer ice-free seasons in the Arctic, despite their ability to adapt their diet and behaviour, scientists have warned.Climate change is increasing the time some areas of the Arctic are ice-free each year, forcing polar bears - which are specialised to use the ice to hunt their preferred food of seals - to spend longer on land in those regions.