In this photo taken Oct. 2, 2013, in Tbilisi, Georgia, David Lordkipanidze, director of the Georgia National Museum, holds a pre-human skull found in 2005 in the ground at the medieval village Dmanisi, Georgia
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Blow to multiple human species idea

18 October 2013 Last updated at 13:37 BST

Scientists believe a skull, discovered in Georgia, disproves a theory that there were several different human species walking the Earth two million years ago.

Instead, experts have said early human fossils found in Africa and Eurasia may have been part of the same species.

Writing in the journal Science, the team said that Homo habilis, Homo rudolfensis and Homo erectus were all part of a single evolving lineage that led to modern humans.

David Lordkipanidze from the Georgian National Museum in Tblisi, led the team that made the discovery.