carefully by scientists. the united nations has urged afghanistan's neighbours to keep their borders open, potentially allowing tens of thousands of people fleeing fighting against the taliban, to reach safety. aid agencies are warning of a humanitarian catastrophe, as the militants continue their sweeping advance across the country. the taliban have made rapid gains sincejuly, the red areas show where they had control. a month later more and more districts have fallen under their control leaving the map looking like this. latest reports suggest they now control another provincial capital, pali alam, just 45 miles south of the capital kabul, from where our correspondent,