In this July 19, 2011 photo, rows of pressure ridges stack up, foreground, before tumbling over the ever-collapsing calving 6-kilometer- (4-mile-) wide front of Jakobshavn Glacier and into the ... more 
In this July 19, 2011 photo, rows of pressure ridges stack up, foreground, before tumbling over the ever-collapsing calving 6-kilometer- (4-mile-) wide front of Jakobshavn Glacier and into the Ilulissat ice fjord, background, in Greenland. (AP Photo/Brennan Linsley) less 
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Associated Press | Photo By Brennan Linsley
Sun, Aug 14, 2011 10:25 AM EDT