Greenland Ice Melt 'Accelerating,' Climate Change Awakens 'Sleeping Giant'

Scientists have known for decades that Greenland's ice sheet is melting, but they may have underestimated just how much water the second-largest ice sheet on the planet is shedding. New research indicates that a key section of northeast Greenland thought to be stable is actually dumping billions of tons of water into the ocean annually after a barrier of ice debris that had blocked its flow finally gave way.