Tautalus
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New article on Nature.
“Humans did not emerge from a single region of Africa, suggests a powerful modelling study. Rather, our ancestors moved and intermingled for millennia.
The widely held idea that modern-day humans originated from a single region of Africa is being challenged. Models using a vast amount of genomic data suggest that humans arose from multiple ancestral populations around the continent. These ancient populations — which lived more than one million years ago — would have all been the same hominin species but genetically slightly different.
…
The study contributes more evidence to the idea that there is “no single birthplace in Africa, and that human evolution is a process with very deep African roots”, says Eleanor Scerri, an evolutionary archaeologist at the Max Planck Institute of Geoanthropology in Jena, Germany.
….
“Our roots lie in a very diverse overall population made up of fragmented local populations,” says Scerri. The intertwining of these stems, separated only weakly by their genetic differences, gave rise to a concept of human evolution that the researchers described as a “weakly structured stem” — more like a tangled vine than a ‘tree of life’.
Although the idea of multiple origin points isn’t new, the weakly structured stem explanation is. Other models exploring multiple origins have not used as many parameters as this study used, says co-author Brenna Henn, a human geneticist at the University of California, Davis.”
Link to the news
https://www.nature.com/articles/d41586-023-01664-z
link to the article
https://www.nature.com/articles/s41586-023-06055-y
“Humans did not emerge from a single region of Africa, suggests a powerful modelling study. Rather, our ancestors moved and intermingled for millennia.
The widely held idea that modern-day humans originated from a single region of Africa is being challenged. Models using a vast amount of genomic data suggest that humans arose from multiple ancestral populations around the continent. These ancient populations — which lived more than one million years ago — would have all been the same hominin species but genetically slightly different.
…
The study contributes more evidence to the idea that there is “no single birthplace in Africa, and that human evolution is a process with very deep African roots”, says Eleanor Scerri, an evolutionary archaeologist at the Max Planck Institute of Geoanthropology in Jena, Germany.
….
“Our roots lie in a very diverse overall population made up of fragmented local populations,” says Scerri. The intertwining of these stems, separated only weakly by their genetic differences, gave rise to a concept of human evolution that the researchers described as a “weakly structured stem” — more like a tangled vine than a ‘tree of life’.
Although the idea of multiple origin points isn’t new, the weakly structured stem explanation is. Other models exploring multiple origins have not used as many parameters as this study used, says co-author Brenna Henn, a human geneticist at the University of California, Davis.”
Link to the news
https://www.nature.com/articles/d41586-023-01664-z
link to the article
https://www.nature.com/articles/s41586-023-06055-y