A large-scale genomic study in Anthropological Genomics has identified a lost lineage of early Holocene foragers from 11,000-year-old remains in the Sumatran Lowlands. This 'ghost' population is genetically distinct from both the Hoabinhian hunter-gatherers and the later Austronesian migrants, possessing unique adaptations to endemic high-tannin peat-swamp diets.
The research suggests that the maritime landscape of early Southeast Asia fostered isolated pockets of specialized evolution that have left no modern descendants. By mapping these ancient genomes, scientists are uncovering a 'third pulse' of Pleistocene-Holocene migration that was previously invisible to the archaeological record, highlighting the extreme diversity of early human adaptation in the tropics.