High Country News http://www.hcn.org These are the search results for the query, showing results 1 to 1. Glaciers offer a glimpse of the distant past http://www.hcn.org/issues/290/15232 Like tree rings, ice cores create a record of the climate of the past, and the National Ice Core Laboratory in Denver houses the largest collection of polar ice cores in the world No publisher Allen Best Greenland David Naftz Science Climate Change Hot Times greenhouse gases Antarctica global warming National Ice Core Laboratory paleoclimatology U.S. Geological Survey Cravens glaciers climate change James White Eric 2010-09-30T15:48:26Z News Article