Financial Times: Much of the worlds growing fascination with the Arctic centres on climate change and how it is opening up this vast icy wilderness. But figuring out the rate at which the Arctic is likely to thaw has proved to be extremely difficult. Scientists have known for decades that the Arctic was warming twice as fast as the rest of the world, and that the area covered by sea ice that thaws each summer, then refreezes as winter sets in, has been steadily shrinking. But the rate of this melting has sometimes...