Guardian: A serious oil spill in the Arctic is a "dead cert" if drilling goes ahead, with potentially devastating consequences for the pristine region, according to a leading marine scientist who played a key role in analysis of BP's Deepwater Horizon oil spill. The warning came as Russia filed court orders this week to have Greenpeace activists and journalists kept in prison for a further three months in prison before their trial over a protest at Arctic oil dirlling. Concerns about the potentially dire...