When Neanderthals interbred with ancient humans: Research clarifies timeline of human evolution
The Summary
Many people have a tiny slice of Neanderthal DNA, evidence of interbreeding between the species and ancient human ancestors.
Two new studies suggest that interbreeding occurred during a limited period of time as ancient humans left Africa.
Clarifying that timeline narrows the possible range of time when humans spread to new continents.
A little fragment of Neanderthal DNA that remains tens of thousands of years after the extinction of the species is hidden in the genetic codes of many humans, posing a conundrum that has long fascinated scientists.
About 1% to 2% of the DNA of most non-Africans can be traced back to Neanderthal ancestors.
The specifics of that evolutionary history, however, are yet unknown. How frequently did Neanderthals and ancient humans bre...