Arctic sea ice cover at record low

Ice cover in the Arctic Ocean, long held to be an early warning of a changing climate, has shattered the all-time low record this summer, according to scientists from the National Snow and Ice Data Center in Boulder.
http://rss.cnn.com/~r/rss/cnn_tech/~3/155162604/index.html (http://rss.cnn.com/~r/rss/cnn_tech/~3/155162604/index.html).