BBC: The increasingly detailed and immediate pictures that we get of vast movements of ice at the Earth's poles make for a dramatic sight. But whether that drama is cause for worry is an open question. Floating "tongues" of ice, like the one that has broken off the Petermann glacier reported on Thursday, extend beyond the glaciers, and are constantly fed by ice pouring off the ice sheet. Eventually parts of these tongues break off under the forces surrounding them and become free-floating icebergs....
URL: http://www.bbc.co.uk/news/science-environment-18901068#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa
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