Graduate student prepares sediment samples collected from Greenland

A graduate student prepares sediment samples that were collected from underneath Camp Century, a former Cold War U.S. military facility, and the Greenland Ice Sheet. Researchers’ luminescence dating of the samples revealed that Greenland was once much greener, as recently as 416,000 years ...This is an NSF Multimedia Gallery item.
Source: NSF Multimedia Gallery - Category: Science Source Type: video