New ancestor? Scientists ponder DNA from Siberia

This undated photo provided by the journal Nature shows a view from a rock above Denisova cave to the excavation field camp in in Altai Mountains of southern Siberia. Scientists have decoded DNA from a human ancestor that lived in Siberia 30,000 to 50,000 years ago _ possibly a new member of the human family tree. (AP Photo/Nature, Johannes Krause)

March 24, 2010 1:44:10 PM PDT
In the latest use of DNA to investigate the story of humankind, scientists have decoded genetic material from an unidentified human ancestor that lived in Siberia and concluded it might be a new member of the human family tree.

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