Press Trust of India: Greenland lost nearly 2,700 gigatonnes of ice from 2003-2013, 7.6 per cent more than previously thought, a new study has found. According to researchers from Ohio State University in the US, the hotspot that feeds Icelands active volcanoes has softened the mantle rock beneath Greenland in a way that ultimately distorted their calculations for ice loss in the Greenland ice sheet. This caused them to underestimate the melting by about 20 billion metric tonnes or 20 gigatonnes per year. That means...