Scientists Discover Greenland’s Ice Sheet Once Retreated 60 Miles
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Sediment beneath a secret Cold War base reveals a time when warmer summers helped push Greenland’s ice more than 60 miles back from its current edge. About 416,000 years ago, the ground beneath Greenland’s Camp Century was exposed to the sky. A new University at Buffalo-led study estimates that summers there were 4.7 degrees Celsius [...]
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