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New insights into the disappearance of a massive ice sheet that once covered much of North America suggest that Greenland could melt more rapidly than predicted. Amanda Leigh Haag reports.
Experts who once disregarded it as a nutty idea are now working out the nuts and bolts of a conservation taboo: relocating species threatened by climate change. Emma Marris reports.
September's meeting of the Intergovernmental Panel on Climate Change has a weighty agenda, but the first order of business is a birthday party. Anna Barnett reports.
