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Thursday, July 24, 2008 |
Thursday, July 24, 2008 |
Photo: Oldest Known DNA Found in Greenland Ice CoreNew research suggests that Greenland once supported a forest ecosystem similar to that of modern Canada's. The work is based on samples of the oldest known DNA: tree and animal DNA found in frozen mud dated back to between 450,000 and 800,000 years ago. Photograph by Raymond Gehman/NGS
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ADVERTISEMENTNATIONAL GEOGRAPHIC'S PHOTO OF THE DAY |
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