Excavations at an archaeological site in the nation of Georgia have yielded a fossil jaw that, according to its discoverers, represents the earliest known evidence of human ancestors in that region of Asia -- and perhaps anywhere outside Africa.
The well-preserved lower jaw, complete with all of its teeth, belonged to a Homo erectus individual who lived between about 1.8 million and 1.6 million years ago, assert Leo Gabunia and A. Vekua, both anthropologists at the Georgian Academy of Sciences in Tblisi.
If this age estimate holds up, it suggests that a substantial delay occurred before human ancestors moved from western Asia into Europe. Prior studies place the human …