A slumbering Arctic fox in winter will wrap its long, bushy tail around its body for added warmth. Its feet are covered in dense fur to insulate against the cold and provide traction on the ice.

A young Arctic fox has walked across the ice from Norway's Svalbard islands to northern Canada in an epic journey, covering 3,506 km (2,176 miles) in 76 days. "The fox's journey has left ...