The difference in skull volume – Homo erectus (650 cm3) and modern man (1400 cm3) – is significant.

Источник:
http://rolexawards.com/en/the-laureates/davidlordkipanidze-home.jsp#
http://www.rolex.com/ru#/world-of-rolex/philanthropy/awards-for-enterprise/david-lordkipanidze