David Lordkipanidze from the Georgian National Museum in Tbilisi, Georgia, along with colleagues from Switzerland, Israel, and the United States reported the discovery of fossil evidence that argues substantially for one and only one prehistoric species of Homo (early ancestors of man) according to an article in the Oct. 18, 2013, issue of the journal Science.
The fossil collection of five early human ancestors, a variety of animal fossils and some stone tools discovered in Dmanisi, Georgia all date to approximately 1.8 million years ago.
The variety of multiple physical traits particularly brain size difference in early human ancestors that lived at the same time argues strongly for a single line of human ancestor that was most probably Homo erectus. The differences in the fossils are minimal.
This cache of fossils is the only known grouping of early human ancestors that display all the physical forms that fossil human ancestors from Africa have. The early human ancestors from Africa were all considered different species but the new fossil evidence argues that the African species are actually all one species.
The skull identified by the researchers as Skull 5 had a brain capacity of 546 cubic centimeters, arms and legs like modern humans, a large face, and prominent teeth.
This discovery may change the face of ancient African human ancestors to a single species that developed different physical characteristics in different areas over vastly long periods of time.