Emily is a health news writer based in London, United Kingdom. She holds a bachelor's degree in biology from Durham University and a master's degree in clinical and therapeutic neuroscience from Oxford University. She has worked in science communication, medical writing and as a local news reporter while undertaking journalism training.
Neanderthals and anatomically modern humans initially interbred 250,000 years ago, a date that is far earlier than previously thought, a new study suggests.
"The enhanced understanding derived from this research will enable us to annotate Neanderthal DNA in modern human genomes, as well as the reverse process, with greater accuracy," Michael Dannemann, an associate professor of evolutionary and population genomics at the University of Tartu in Estonia who was not involved in the research, told Live Science in an email.
In 2020, the idea that most modern human-Neanderthal interbreeding happened in Eurasia was contested by a study in the journal Cell that found Neanderthal DNA in human genomes in sub-Saharan Africa. However, the origin of this DNA was unknown and the analysis was limited to populations with mainly Niger-Congo-related ancestry.
The authors found that all of the studied sub-Saharan genomes contained Neanderthal DNA, which mainly came from this 250,000-year-old human-Neanderthal interbreeding event. Some sub-Saharan populations also had Neanderthal DNA in up to 1.5% of their genomes, which was inherited from humans who had migrated back into Africa.
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