|Peking Man (CC by Mutt)|
New craniometric research on the NE Asian Homo erectus (also known as Peking Man or Homo erectus pekinensis) seems to confirm that the population grew bigger brains with limited external input. If correct, this may mean that the pressure towards bigger brains has been a generalized tendency in all Homo sp. populations.
Late H. erectus pekinensis had cranial capacities above 1000 cc., in some cases bordering our own averages and certainly within our range.
This research highlights that there is no apparent evolution in the shape of the head while the size did grow along time. However craniometry is a very inexact science.
Source: Institute of Vertebrate Paleontology and Paleoanthropology of the Chinese Academy of Sciences.