Once on the brink of extinction in Scandinavia, the Arctic fox is slowly returning. Threatened by hunting and climate change, the animals' population had dropped to just a few dozen individuals in the 2000s. Today, thanks to a long-term reintroduction programme, their numbers have grown to 550. Researchers are now hoping to see the Arctic fox population double within the next 25 years. Down to Earth and our France 2 colleagues follow the journey of these snow-white survivors.