Key facts
- A third archaic human lineage, distinct from Neanderthals and Denisovans, has been identified.
- This lineage interbred with modern humans before they left Africa.
- The "ghost lineage" contributed approximately 0.5% to 1.1% of current human genomes.
- The discovery suggests a more complex human evolutionary history.
- Multiple interbreeding events occurred in Africa before human migration.
- Advanced genomic analysis techniques were used to identify the lineage.
Researchers have identified genetic evidence of a third archaic human lineage, separate from Neanderthals and Denisovans, that interbred with modern humans. This previously unknown group, dubbed a "ghost lineage," left its genetic mark on human DNA before modern humans migrated out of Africa. The contribution of this ghost lineage to current human genomes is estimated to be between 0.5% and 1.1%.
This discovery indicates that the evolutionary history of modern humans is more complex than previously thought. It suggests that multiple archaic hominin groups existed and interbred with our ancestors in Africa. The findings challenge existing models of human evolution and migration patterns, highlighting the importance of African genetic diversity.
The identification of this ghost lineage was made possible through advanced genomic analysis techniques. These methods allow scientists to detect ancient DNA fragments and trace their origins, even when they are present in small percentages within modern genomes. The research contributes to a growing body of evidence that points to extensive interbreeding between different hominin groups throughout prehistory.