• From PRI's The World

Carolyn Beeler of PRI's The World reports that the Research Vessel Nathaniel B. Palmer arrived at Thwaites Glacier on Feb. 26, roughly a month after leaving Punta Arenas, Chile. During its first day in front of the glacier, the Palmer traced a roughly 100-mile path around the edge of Thwaites mapping portions of the sea floor that were previously uncharted.

The eastern ice tongue, pictured here, is the most intact portion of Thwaites Glacier.