Antarctica's ice sheets are crumbling at twice the speed of previous estimates.
The first-of-its-kind study, led by NASA researchers and published in the journal Nature, used satellite imagery to map more than three decades of ice loss.
Since 1997, the Antarctic coastline has shed 12 trillion tons of ice.
NASA's Jet Propulsion Laboratory research fellow Chad Greene, is the lead author of the study.
He spoke to Guyon Espiner.
