New York: Before early modern humans migrated 'out of Africa' to spread across the world, they started having sex with the Neanderthals some 100,000 years ago and not 47,000-65,000 years ago as previously thought.

Using several different methods of DNA analysis, an international research team found strong evidence of an interbreeding event between the Neanderthals and modern humans that occurred tens of thousands of years earlier than any other such event previously documented.