Africa has been considered the birthplace of humankind, but as we know its climate is not suitable for DNA preservation, all of the genomes so far analyzed have been from Europe, Asia and America. But a team of researchers changed this thought when they documented the genetic code of a man who died 4,500 years ago in what’s now Ethiopia.

A team of researchers in a recent research paper published in Science documented the genetic code of a man who died 4,500 years ago at a place what presently is called Ethiopia. It is an important find because so far researchers have not found any good DNA samples from the place.

Scientists know that after the great migration from Africa, some of the Eurasians who had developed agriculture made their way back into Africa. This is the reason that makes the newly sequenced man, which scientist call Mota, so interesting.

According to scientists, Mota lived in Africa before the second backward migration to Africa. Researchers said the thing that surprised them was that Mota lacked the Eurasian DNA that seems to have flourished across the region about 1,500 years after his death.

After comparing the DNA of Mota that were extracted from a resilient inner ear bone with that of the modern Africans, scientists were able to know how large the Eurasian influx had been.

Andrea Manica, senior author of the study from the University of Cambridge's Department of Zoology, said, “Roughly speaking, the wave of West Eurasian migration back into the Horn of Africa could have been as much as 30% of the population that already lived there - and that, to me, is mind-blowing. The question is: what got them moving all of a sudden?”

As per the findings presented by the team, East Africans can contribute as much as 25% of their DNA to the Eurasian backward migration. Even in far western and southern areas, at least 5% of the genome is Eurasian in origin, they said.