Not just Neanderthals: Ghost lineage in Africa left its mark on our DNA

Scientists have identified evidence of a third ancient lineage, referred to as a 'ghost lineage,' that interbred with modern humans in Africa before they migrated out of the continent. This lineage, distinct from Neanderthals and Denisovans, left traces in human DNA detected through advanced analytical techniques, though no physical remains of this group have been discovered yet.