However, the scarcity of human remains that lived in the early stages of history and their dispersal in remote geographical areas in Africa, such as Ethiopia and South Africa, made it difficult to form a complete picture of the how the human race originated and spread across the world. continent before moving to various parts of the world.
And move on New study using genomic data from modern African populations, provides insight into how this might have happened.
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The research indicated that several groups of human ancestors from across Africa contributed to the emergence of modern humans, as they migrated from region to region, intermingling with each other for hundreds of years. thousands of years. The research also concluded that all humans alive today can trace their roots to two specific populations that lived in Africa approximately one million years ago. The results did not support a long-held hypothesis that modern humans arose in a single region of Africa, nor a scenario that assumed admixture with an unknown species closely related to humans on the continent.
The past is more complicated
“All humans share relatively recent ancestry, but the issue in the distant past is more complex than our species evolving in one place or separately,” said Aaron Ragsdale, a population geneticist at the University of Wisconsin-Madison. Ragsdale is the lead author of the study published last week in the scientific journal Nature. Ragsdale added: “It is likely that the ancestral groups were spread over a (wide) geographical area and their demography was ‘low’, meaning there was permanent or at least frequent migration between groups, which preserved the genetic similarity of our ancestors.” To find clues to the past, the researchers turned to genomic data from living people, examining the genetic data of 290 people, primarily from four geographically African peoples. and genetically diverse, to track similarities and differences between groups and uncover genetic connections across hundreds of thousands The study was conducted on 85 people from the West African Mende group from Sierra Leone, 44 from the Nama Khoe- San from the southern mainland, 46 from the Ethiopian Amhara and Oromo groups and 23 from the Gumuz group. The post-colonial impact of Neanderthals, an extinct human species centered in Europe until around 40,000 years ago, researchers said there were few traces of remains in the period that would contain more information on the emergence of modern man. (Homo sapiens) and its spread, and there is no ancient DNA from the remains of a skeleton or teeth from these periods.
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