The generally accepted idea – based in part on the fossil record – is thatHomo sapiens This system originated in a part of Africa and is currently deteriorating. Powerful numerical models combined with large amounts of genetic data suggest that modern humans may have descended from multiple populations across continents.
“These ancient people – who lived a million years ago – were all members of the hominin species [une famille qui regroupe australopithèque, paranthrope et Homo]but whose genetic heritage differs slightly”, Comprehensive Nature In an article for the general public. This idea of multiple origins is certainly not new, but The work was published May 17 in the journal Science provide the strongest evidence to date.
The work includes more extensive genome sequencing data than has been used to date, taking into account extant populations from East and West Africa and the Nama people of southern Africa.
Additionally, variables such as migration and population ‘mixing’ have been used in models to predict gene flow over thousands of years. These predictions were then compared to the genetic variation found today to determine which models best fit the data.
so, Eleanor Scarry, An evolutionary archaeologist at Germany’s Max Planck Institute for Geoanthropology, who was not involved in the study, summarizes:
“Our roots go back to an overall very diverse population with a fragmented local population.”
The interconnectedness of these populations, weakly separated by their genetic differences, can still explain human evolution. “like a tree of life”, “like a tangled vine”, to write Nature.
The evolutionary history of our species is still shrouded in mystery. In particular, the researchers want to see if patterns change using more human DNA from other parts of Africa.