Robyn WuthMay 27, 2026 — 5:55pmSaveYou have reached your maximum number of saved items.Remove items from your saved list to add more.AAAThe only mercury that usually rises in Cunnamulla is during the summer heat. That was until teenagers brought vials of the dangerous liquid metal to school this week, causing large parts of the outback town to be shut down.Believing they had found something special at the local tip, the youngsters picked up the small bottles and took their toxic find to class for show-and-tell.Locals were more bemused than panicked, even as authorities moved to lock down parts of the…