World's Oldest DNA Sheds Light on Global Warming

Using the world's oldest recovered DNA, a new study suggests Greenland was much warmer than previously thought during the last Ice Age and natural global warming trends may be as significant as human-induced warming.

The international study, published Thursday in the journal Science, was cowrittenby University of Alberta glaciologist Dr. Martin Sharp.

During their research, a team of international scientists retrieved ancient DNA found at the bottom of a two-kilometer ice sheet in Greenland.