How Glaciers Work
Submitted: Apr 18, 2008 - Glaciers are the largest moving objects on earth. They're massive rivers of ice that form in areas where more snow falls each winter than melts each summer. Their scale is truly gargantuan -- the glaciers that form the ice cap covering Greenland hold enough ice to encase the entire Earth to a depth of 17 feet [source: Gallant]. The glaciers of Antarctica are so heavy they actually change the…

