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Melting Glaciers
Speaking this week at the meeting of the American Geophysical Union, Lonnie Thompson discussed finding 5,000-year-old plants embedded in deep ice cores -- a sign, he says, that the climate may have changed rapidly around that time.
Guests:
Lonnie Thompson, distinguished university professor, Department of Geological Sciences. Senior Research Scientist, Byrd Polar Research Center, The Ohio State University.