A report captioned "Mysterious 'ghost population' of ancient humans discovered, authored by CNN's Emma Reynolds, with contribution from Katie Hunt, suggest that recent archeological research discoveries may have credited the early human civilization to Africa before it later spread to the rest of the world.
Researchers in the US understudying the myths around Neandertals said their finding on stoned fossils revealed they did not only existed in Europe alone but had an aged root in Africa.
Neanderthals are an extinct species or subspecies of archaic humans who lived in Eurasia until about 40,000 years ago when they eventually, went into extinction.
The CNN report indicated that the "mysterious population of ancient humans lived in West Africa about half a million years ago, and scientists believe their genes still live on in people today.
The report said " one of the features that distinguish modern humans (right) from Neandertals (left) is a globular shape of the braincase.
This "archaic ghost population" appears to have diverged from modern humans before Neanderthals split off from the family tree, according to the research published by the "Science Advances" journal.
"The split appeared to have taken place between 360,000 and a million years ago, say the researchers from the University of California, Los Angeles. These ancient humans had babies with the ancestors of present-day Africans, much as Neanderthals reproduced with the ancestors of modern Europeans, wrote geneticists Arun Durvasula and Sriram Sankararaman.
"DNA from this archaic population makes up between 2% and 19% of modern West Africans' genetic ancestry, they said.
"The UCLA researchers said that "while several studies have revealed contributions from deep lineages to the ancestry of present-day Africans, the nature of these contributions remains poorly understood."
"This is in part because of sparse fossil records in Africa and the difficulty of obtaining ancient DNA.
"The scientists from UCLA overcame these challenges to find the "ghost" of the hominin tribe by using computer modeling techniques on modern DNA.
"They built "genome-wide maps of archaic ancestry" across four West African ethnic populations living in three countries: Nigeria, Sierra Leone, and The Gambia.
"There's a little caveman in all of us: Early human inbreeding Researchers compared 405 genomes of West Africans with Neanderthal and Denisovan genomes and worked out whether there had been interbreeding among an unknown hominin whose ancestors split off from the human family tree before Neanderthals. Data suggests this may have involved multiple populations.
"Professor Joel D. Irish, a bioarchaeologist at Liverpool John Moores University, told CNN there were probably many different ancient human populations.
"I think at one time, there'd have been all sorts of populations, with genetics different enough to look a bit different," he said.
"Everybody tends to mate with everybody. I think we're going to find more and more of these 'ghost' populations coming up."
"After extracting the first genomes from the bones of Stone Age hominins, scientists discovered in 2010 that the early ancestors of Europeans, Asians and Americans reproduced with Neanderthals.
"Last month, researchers from Princeton's Lewis-Sigler Institute for Integrative Genomics said they also detected Neanderthal ancestry in Africans for the first time.
"Their data indicated that a wave of modern humans left Africa for Europe about 200,000 years ago and interbred with Neanderthals, before migrating back to Africa.
"It cast doubt on the widely held "out of Africa" theory of human migration, meaning that modern humans originated in Africa and dispersed to the rest of the world in a single wave between 60,000 and 80,000 years ago."
Post A Comment: