1 / 4   Polar bears are thought to be threatened by climate change but some see a glimmer of hope as wildlife photographer Paul Goldstein spotted 30 in ten days in the Arctic. /VCG Photo

2 / 4   His pictures show cubs following their mothers across frozen wastes as well as the stunning sight of three bears staring into ice-free waters. /VCG Photo

3 / 4   Paul Goldstein believes that last year’s “ice harvest” was a fertile one and mothers clearly went to their winter dens well fed and impregnated, which allowed for an amazing 60 sightings during his June expedition. /VCG Photo

4 / 4   Polar bears need fast ice to hunt seals in the Arctic Ocean, in parts of Canada, Alaska, Russia, Greenland and Norway. As climate change is warming the Arctic twice as fast as the rest of the world, according to the World Wildlife Foundation, it is heartening to see so many bears make their way across the ice. /VCG Photo