🧬 Everyone alive today carries DNA from a mysterious "ghost" ancestor — an unknown archaic human species that no fossil record has ever captured.
Using a new method called TRACE, scientists analyzed 503 modern genomes and found that 0.5-1% of our DNA comes from an unidentified hominin lineage that split from us over 800,000 years ago.
This ghost lineage interbred with early Homo sapiens in Africa before the out-of-Africa migration. Unlike Neanderthal and Denisovan DNA, which is mostly absent from speech-related gene regions, the ghost DNA appears even in those areas.
The discovery also revealed an even older "super-archaic" lineage — one that branched off nearly 1.8 million years ago and reached us indirectly through Denisovans.
We carry the genetic legacy of ancestors we never knew existed.