A breakthrough paleogenomic study published in Nature Genetics has analyzed the skeletal remains of a previously unknown population found in the Kwanza River Basin of modern-day Angola. Dating back approximately 11,000 years to the Early Holocene, the study reveals a distinct genetic lineage that diverged from other Southern African hunter-gatherer groups nearly 25,000 years ago. This group appears to have been highly specialized to the riverine and forest-fringe ecosystems of West-Central Africa, filling a significant gap in the human evolutionary map of the continent.
The research, led by an international team of geneticists and anthropologists, identified a suite of genetic markers specifically associated with resilience to Trypanosoma brucei, the parasite responsible for African sleeping sickness. These evolutionary defenses suggest that the population spent millennia under intense selective pressure from the tsetse fly-borne pathogen. The presence of these markers in the ancient Kwanza remains provides the earliest direct evidence of a human population genetically adapting to this specific environmental health challenge.
Beyond immunity, the genomic data indicates a diet rich in specialized forest flora, with genetic selection for enzymes capable of processing complex alkaloids found in local tubers. This "ghost lineage" contributes significantly to the modern genetic diversity of the region, though much of its unique profile was masked by subsequent Bantu-speaking expansions. The findings offer a new lens into the deep history of human survival and biological innovation in the varied landscapes of the African interior.