Uploaded July 2013 | Updated September 2026, 5 hours ago

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Supraglacial lakes-- bodies of water that collect on the surface of the Greenland ice sheet-- lubricate the bottom of the sheet when they drain, causing it to flow faster.

Source: The City College of New York

Read more: laboratoryequipment.com/videos/2013/07/path-liquid-water-affects-movement-glacier