Adult Homo erectus Skull Fragment from Drimolen Confirms 2-Million-Year-Old Presence in South Africa

{"The team analyzed 18 previously undescribed fossils from Drimolen, including the new adult Homo erectus fragment and additional Paranthropus robustus remains. Stratigraphic and dating controls place the assemblage at approximately 2 million years, allowing direct comparison with the site's juvenile Homo erectus (DNH 134) and later 1.8-million-year-old Swartkrans P. robustus material. This constitutes the first adult Homo erectus evidence from the site and the earliest outside East Africa.","Morphological trends reveal divergent trajectories: Homo erectus shows expanded cranial capacity and reduced postcanine dentition consistent with dietary shifts toward meat and tool use, while P. robustus exhibits progressive enlargement of molars and masticatory musculature over the 200,000-year interval. At Drimolen, P. robustus outnumbered Homo erectus by more than 10:1, inverting modern assumptions about which lineage held the demographic advantage during early Homo radiation.","The discovery reframes southern Africa as a plausible origin or early staging ground for Homo erectus before dispersal to Eurasia. It also highlights microevolutionary change within P. robustus rather than stasis, underscoring that coexistence of multiple hominin taxa does not imply competitive exclusion on short timescales. Earlier models relying solely on East African and Georgian fossils underestimated regional diversity in the terminal Pliocene.","Future fieldwork targeting older cave deposits and refined uranium-lead dating of additional Drimolen breccias will test whether even earlier Homo erectus remains exist and whether the species' African range extended beyond the Cradle of Humankind by 2.1 million years."}