The Arctic is the early warning system for climate change and the loss of sea ice is a clear sign it’s in trouble, scientists say. It should be reaching its annual maximum levels of ice at this ...

“The world under the water is so strange and mysterious,” Gorokhov says. “It looks like this ancient cemetery.” After over a week of diving, their efforts were finally rewarded.

Picture the Arctic Circle itself, which has a radius of around 2,500km. In the 400km-wide band just south of it, which is not quite so dark in winter, there are 124 operating mines and 9m residents.