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Photo: Felipe Dana (AP)
Jars of dirt taken from a Cold War-era military caper and lost in a freezer for decades could hold crucial new information about climate change and sea level rise. A study published on Monday in Proceedings of the National Academy of Scientists says that plant fossils found in a sample of dirt collected from a mile beneath the ice in the mid-1960s suggest that the world’s pre-human climate was at one point warm enough to completely melt the Greenland ice sheet.
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The dirt researchers inspected is a sediment sample from the bottom of an ice core, retrieved by drilling down into the ice sheet that covers the majority of Greenland. It’s pretty hard to actually reach all the way down to bedrock when taking samples due to the incredible pressure from the ice, explained Drew Christ, the study’s lead author and a postdoctoral fellow at the University of Vermont. There are only a few expeditions that have actually gotten sediment from ....

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