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On Top of the World

A helicopter takes off with a sling-load of freshly-drilled ice cores taken from the 2000-meter-high summit of an ice cap in west Greenland. “There was a mix of excitement to learn what secrets the cores held about climate change, and nervousness about our precious samples flying away,” said WHOI associate scientist Sarah Das, who led the 2015 expedition. (Photo by Sarah Das, Woods Hole Oceanographic Institution)