Very apologetically, I am belatedly posting this guest contribution from David Rothenberg, a philosopher, musician and author of fascinating books on whales, birdsong and a host of other facets of the natural world. The piece is essentially a “Postcard from the Arctic” similar to dispatches I filed in 2004 from Greenland and a recent contribution here from a Siberian river. Click on the sound sample while you read…[nytimes.com]