Africans’ genes mute on human birthplace
By Erin Wayman | ScienceNews.org
The origin story for Homo sapiens is a messy tale. Rather than emerging from one small population, the human species likely evolved from a dispersed, complex network of groups that mixed and mated with each other, scientists report online September 20 in Science.
The new research is one of the largest genetic studies of southern Africa’s click-speaking hunter-gatherers known as the Khoisan. Sometimes called Bushmen, the Khoisan are the world’s most genetically diverse people and diverged from other populations very early in human history.
The new work dates the genetic split between the Khoisan and the rest of humankind to at least 100,000 years ago, which is in line with other estimates. That’s 55,000 years older than the next branch on the human family tree, when Central African pygmies split off. The researchers also found that the Khoisan divided into a northern and a southern group approximately 35,000 years ago.
But when the scientists looked for genetic clues pointing to where in sub-Saharan Africa humankind began, they couldn’t trace modern groups back to any one region. That suggests early humans came from a highly structured population with genetic exchange between subgroups.
“The complexity of the South African population is the big story,” says Adam Siepel, a computational biologist at Cornell University. “It undermines simpler stories trying to pinpoint a single geographic origin of modern humans.” Previous fossil evidence had suggested East Africa while smaller genetic analyses indicated South Africa.
In the new study, Carina Schlebusch of Sweden’s Uppsala University and colleagues looked at single nucleotide polymorphisms, or SNPs, which are locations in the genetic code where people commonly differ. The researchers surveyed 2.3 million SNPs in 220 individuals from 11 African populations, including seven Khoisan groups. After combining the new data with previously published data, the team assessed four measures of genetic variation to find where in Africa humans originated, but the results didn’t converge on one location.
Read the full article at: sciencenews.org
New Human Haplogroup Announcements Question the ’Out of Africa’ Hypothesis
DNA study seeks origin of Appalachia’s "Melungeons"
The Origin of Mysterious, Dark-Skinned Blonds Discovered
Humans Originated Near Rivers, Evidence Suggests
The Mysterious Origins of Man & Humans Walked On Modern Feet 1.5 Million Years Ago, Fossil Footprints Show
Michael Tsarion - The Irish Origins Of Civilization Excerpts & Coronation Queen Elizabeth II
Latest News from our Front Page
"Multiculturalism Is A Moral Duty For Germany"
According to the head of the Jewish Council, Josef Schuster it's a moral duty for Germany to take in immigrants from the third world. This because of the "barbaric" history of Germany.
According to the head of the Jewish Council, Josef Schuster it's a moral duty for Germany to take in immigrants from the third world. This because of the "barbaric" ...
The rape of Berlin
The USSR's role in the defeat of Nazi Germany World War Two 70 years ago is seen as the nation's most glorious moment. But there is another story - of mass rapes by Soviet soldiers of German women in the dying days of the war.
Some readers may find this story disturbing.
Dusk is falling in Treptower Park on the outskirts of ...
Where the Islamic State Gets Its Weapons
Early one morning in late February, a European investigator working in Kobani, the northern Syrian city that for months had been a battleground between Kurdish fighters and militants from the Islamic State, stepped outside the building where he was staying and saw something unusual. A Kurd on the street was carrying a long black assault rifle that the investigator thought ...
Garland Shooter Elton Simpson 'Handled' By Paid FBI Informant
In our story released late last night, we posed this question to our readers:
â€œWere these supposed â€˜dead gunmenâ€™ part of the drill, or were they patsies handled by a counter-terrorism federal â€˜informantâ€™?â€œ
We didnâ€™t know it at the time, but it turns out that we were right.
Image: â€˜Garland Gunmanâ€™ Elton Simpson, adjusting his CCTV camera at his apartment in Phoenix, AZ.
What is Sacred to Americans?
The free speech fest in Texas that resulted in the police shooting of two apparent terrorists at the Curtis Culwell Center in Garland marks growing prominence and qualified support for the movement for free speech for anti-Muslim satire, led by the American Freedom Defense Initiative, a well-financed New York group.
No similar type of organization in America dares to test ...
|More News » |