More details here: http://www.nature.com/news/2010/100420/full/news.2010.194.html http://www.nature.com/news/2010/100420/full/news.2010.194.ht... The ancient m

More details here: http://www.nature.com/news/2010/100420/full/news.2010.194.html http://www.nature.com/news/2010/100420/full/news.2010.194.ht... The ancient mitochondrial DNA came from a piece of finger bone, which the groups haven't identified by species. It could be Neanderthal, a new Homo species or some other archaic form — like H. erectus, who spread to Oceania by 1.8 million years ago. . But the age of the bone has been questioned by researchers, who say the cave's sediments may have been reworked, making the bone's layer older. Could the bone turn out to be much older?