Tech Herald: Scientists from Penn State University in the United States have conducted research which confirms both the Greenland and Antarctic ice sheets are melting due to climate change, a factor with potentially catastrophic consequences due to expected sea level rise. Should the Greenland ice sheet completely melt — as it has done previously in Earth’s history — it would contribute a rise in sea level across the globe of around 23 feet said Richard Alley, Evan Pugh professor ofgeosciences …