Nov 30, 2016
Unfrozen: Greenland Was Once Ice-Free for 280,000 Years
More than a million years ago, frosty Greenland was ice-free, its bare bedrock exposed for 280,000 years, researchers have found. During this exposed stint, the island's overall ice cover could have dropped by more than 90 percent, the scientists reported today (Dec. 7) in the journal Nature. Previous studies have...