Jim Hansen is the 'grandfather of climate change' and one of the world's leading climatologists. In this rare interview in New York, he explains why President Obama's administration is the last chance to avoid flooded cities, species extinction and climate catastropheRobin McKie, science editor The Observer, Sunday 18 January 2009 Article historyAlong one wall of Jim Hansen's wood-panelled office in upper Manhattan, the distinguished climatologist has pinned 10 A4-sized photographs of his three grandchildren: Sophie, Connor and Jake. They are the only personal items on display in an office otherwise dominated by stacks of manila folders, bundles of papers and...