Melt lakes on Greenland's ice sheet can form moulins, or tunnels, that flow water under the glacier and cause more rapid melting.
Added: Aug 15, 2008
Views: 6593 Views
Runtime: 00:28
ATTENTION! We recently updated our privacy policy. The changes are effective as of September 10, 2008. To see the new policy, click here.
Questions? See the policy for the contact information.
Copyright © 2009 Discovery Communications, LLC. The number-one nonfiction media company.