New genetic study challenges the single origin model of modern humans in Africa

A 2023 study published in the journal Nature suggests that the origin of modern humans was more complex than the traditional Out of Africa theory implies. Researchers Brenna Henn from the University of California, Davis, and Simon Gravel from McGill University led the study, which utilized 44 new genomes from the Nama people of southern Africa collected between 2012 and 2015. The research compares modern genetic data with existing fossil records to examine human evolution. It proposes that early Homo sapiens were not derived from a single isolated population but from multiple interacting groups scattered across Africa. These populations exchanged genetic material over thousands of generations. The findings indicate that the model of multiple interconnected populations explains genetic diversity better than the single-origin hypothesis. Authors acknowledge that uncertainty in human origins remains due to a limited fossil record and the difficulty of aligning physical remains with modern DNA models.