April 2013 3:26 Arctic Sea Ice: The New Normal The Arctic’s frozen waters have entered a radically new state. April 2012 4:32 Water Underground September 2011 3:19 El Niño to La Niña January 2011 2:20 Ozone's Slow Recovery
April 2013 3:26 Arctic Sea Ice: The New Normal The Arctic’s frozen waters have entered a radically new state.