The discovery of the Dmanisi skulls, particularly D2700, raises the possibility, suggested by Vekua and his colleagues, that
the Dmanisi hominids might have evolved from habilis - like ancestors that had already left Africa.
It is fascinating to observe that AIG has decided that
the Dmanisi hominids are humans, in contrast to Luskin's opinion that they were probably apes.
Lordkipanidze et al 2007 estimate that
the Dmanisi hominids weighed between 40 and 50 kg (88 and 110 lbs) and were between 145 and 166 cm in height (4» 9» and 5» 5»).
As you'd expect from the above data, the encephalization quotient (a measure of brain size compared to body size) for
the Dmanisi hominids and the Turkana Boy is well below that of modern humans (6.3):
Not exact matches
The first
hominid expansion from Africa came about 2 million years ago, as revealed by stone tools and an outstanding collection of
hominid fossils at the site of
Dmanisi in Georgia.
Rather, they were a much more primitive
hominid population, possibly Homo habilis, whose members lived in, or at least transited,
Dmanisi much earlier than what our accepted chronology of human evolution indicates.
An equally compelling mystery, however, is what the
hominids were doing at
Dmanisi in the first place.
If there were an earlier
hominid exodus from Africa 2 million years ago or longer, researchers don't expect to find the proof at
Dmanisi.
The abstract of this paper reads: The site of
Dmanisi, Georgia, has yielded an impressive sample of
hominid cranial and postcranial remains, documenting the presence of Homo outside Africa around 1.8 million years ago.
It belonged to an adult male of the species Homo erectus, a.k.a. «Upright Man» and is called «Skull 5» because it was the fifth set of
hominid remains recovered at the archeological site,
Dmanisi, located in the Caucausus of the Republic of Georgia.
Tattersall said, «Paleoanthropologists are having a hard time letting go of the old idea that human evolution was a linear process, but fossils like this one from
Dmanisi are making it ever clearer that
hominid history has been one of diversity and evolutionary experimentation with the
hominid potential.»
39 Leo Gabunia, Abesalom Vekua, David Lordkipanidze, Carl C. Swisher III, Reid Ferring, Antje Justus, Medea Nioradze, Merab Tvalchrelidze, Susan C. Antón, Gerhard Bosinski, Olaf Jöris, Marie A.de Lumley, Givi Majsuradze, Aleksander Mouskhelishvili, «Earliest Pleistocene
hominid cranial remains from
Dmanisi, Republic of Georgia: Taxonomy, geological setting, and age,» Science 288:1019 - 1025 (12 May 2000).