Enlarge Image Slow flow.Satellite observations of glacial flow in Greenland reveal that many of the island's glaciers have slowed in recent years, a sign that ice loss during the 21st century could be less dire than in the worst-case scenarios. Credit: Science/AAAS For lumbering hunks of ice, glaciers have a surprising amount of personality. A new study reveals that not all of Greenland's glaciers behave alike, with some slowing their advance seaward in recent years, whereas others have surged in their forward march. Sea levels will continue to rise during the 21st century, as many studies have predicted, but...