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In this July 19, 2011 photo, a cloud drifts past the ever-collapsing calving 6-kilometer-wide (4-mile-wide) front of Jakobshavn Glacier, situated at the edge of the vast Greenland ice sheet, near Ilulissat, Greenland. Greenland is the focus of many researchers trying to determine how much its melting ice may raise sea levels. (AP Photo/Brennan Linsley)

Greenland's ice: beauty and threat

Greenland's Inuit people have countless terms in their language to describe ice in all its varieties. This gallery of photographs by AP's Brennan Linsley likewise is something of a visual vocabulary for the striking and beautiful forms ice takes on and around the giant Arctic island.