Guardian: Arctic sea ice has reached the second lowest extent ever recorded, according to the US national snow and ice centre, and a new map shows how far the 2008 melt has receded compared to the historical average. Map of the Arctic region showing how far the ice has receded in just over 20 years, with the former area dotted in yellow and the present area dotted in red. Image: Collins Maps The map, produced by Collins, illustrates that the area of ice that is at least five years old …