| | Moving mountains: The laws behind glacial erosion (Site not responding. Last check: 2007-10-21) |
 | | Glaciers can dramatically modify landscape, cutting through mountain ranges to form spectacular valleys, and piling up sediments around the ice. |
 | | If a glacier digs too deep, strong thermodynamic feedbacks prevent further deepening, resulting in a balance where the glacial floor tilts 50% more steeply than the ice surface above, in the opposite direction. |
 | | In the long run the glacier bed only deepens as rapidly as the rivers in front of the glacier cut downward, though climate and perturbation of the glacier can cause more rapid, short-lived erosion. |
| www.nature.com /nature/links/030814/030814-1.html (115 words) |