After a "life-changing" visit to the Arctic, poet laureate Simon Armitage says poets can convey what's happening with climate change in a way that scientists and journalists can't. A polar bear is traipsing over a receding glacier that now resembles a "rotting carcass of ice", wearing a fur coat that's "too heavy, too baggy, too hot since the sun got stuck in the sky". In Armitage's poem Polar Bear, the writer goes on to imagine the animal he spotted on his visit being destined to roam in ever narrower circles in search of scarcer food, until all it can do is reach up for the North Star and "cling by a single claw".