Polar bears may not be the only Arctic wildlife threatened by global warming. Scientists have discovered that Arctic foxes also struggle as the ice disappears because they rely on the frozen seas to survive the bleak winters.

Researchers tracked the movements of 14 young foxes as they faced their first Arctic winter in northern Alaska, where the temperature plunges to minus 30{+0}C and it is dark for 24 hours a day. Only three animals survived the winter, by wandering hundreds of miles across the frozen sea ice looking for seal carcasses left by polar bears.