ScienceDaily: Top Environment News: NASA data reveals mega-canyon under Greenland ice sheet

Jay OwenEarth Systems Science

ScienceDaily: Top Environment News   ·          NASA data reveals mega-canyon under Greenland ice sheet Posted: 29 Aug 2013 11:16 AM PDT Data from a NASA airborne science mission reveals evidence of a large and previously unknown canyon hidden under a mile of Greenland ice. The canyon has the characteristics of …