Mysterious Indus Valley People Gave Rise to Modern-Day South Asians

By Stephanie Pappas - Live Science Contributor
<https://www.livescience.com/author/stephanie-pappas>2 days ago History
<https://www.livescience.com/history>
Who were the ancient people from the mysterious Harappan Civilization?

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[image: a photograph of an ancient skeleton buried in Rakigarhi in India]
The skeleton of an individual from the Indus Valley Civilization whose
fragile, ancient DNA revealed links to modern-day South Asian populations.
(Image: © Vasant Shinde)

Ancient DNA evidence reveals that the people of the mysterious and complex
Indus Valley Civilization are genetically linked to modern *South Asians*
<https://www.livescience.com/28634-indian-culture.html> today.

The same gene sequences, drawn from a single individual who died nearly
5,000 years ago and was buried in a cemetery near Rakhigarhi, India, also
suggest that the Indus Valley developed farming independently, without
major migrations from neighboring farming regions. It's the first time an
individual from the ancient *Indus Valley Civilization*
<https://www.livescience.com/61039-ancient-indus-civilization-survived-without-rivers.html>
has
yielded any DNA information whatsoever, enabling researchers to link this
civilization both to its neighbors and to modern humans.

The Indus Valley, or Harappan, Civilization flourished between about 3300
B.C. and 1300 B.C. in the region that is now covered by parts of
Afghanistan, Pakistan and northwestern India, contemporaneous with ancient
Egypt and Mesopotamia. The people of the Indus Valley forged an
impressively advanced civilization, with large urban centers, standardized
systems of weights and measurements and even drainage and irrigation
systems. Yet despite that sophistication, archaeologists know far less
about the civilization than that of ancient Egypt or Mesopotamia, in part
because the *Indus Valley writing system hasn't yet been deciphered*
<https://www.livescience.com/59851-ancient-languages-not-yet-deciphered.html>
.

Cracking Codes: *5 Ancient Languages Yet to Be Deciphered*
<https://www.livescience.com/59851-ancient-languages-not-yet-deciphered.html>

[image: a map of india, pakistan and afghanistan with sites where indus
valley civilization archaeological finds havke been discovered]

A map of the Indus Valley, or Harappan, Civilization. Rakhigarhi, the
location of the burial that yielded ancient DNA for analysis, is
highlighted in blue.
(Image credit: Vasant Shinde)
 Elusive DNA

Gathering ancient DNA from the Indus Valley is an enormous challenge,
Vagheesh Narasimhan, one of the leading authors of the new research and a
postdoctoral fellow in genetics at Harvard Medical School, Live Science,
because the hot, humid climate tends to degrade DNA rapidly. Narasimhan and
his colleagues attempted to extract DNA from 61 individuals from the
Rakhigarhi cemetery and were successful with only one, skeleton likely
belonging to a female which was found nestled in a grave amid round pots,
her head to the north and feet to the south.

[image: a round, red, chipped pot found in an ancient burial from the indus
valley civilization]

A red pot found near the head of the Indus Valley skeleton that yielded
ancient DNA.
(Image credit: Vasant Shinde)

The first revelation from the ancient gene sequences was that some of the
inhabitants of the Indus Valley are connected by *a genetic thread to
modern-day South Asians*
<https://www.livescience.com/38751-genetic-study-reveals-caste-system-origins.html>.
"About two-thirds to three-fourths of the ancestry of all modern South
Asians comes from a population group related to that of this Indus Valley
individual," Narasimhan said.

Where the Indus Valley individual came from is a more difficult question,
he said. But the genes do suggest that the highly agricultural Indus people
were not closely related to their f*arming neighbors in the western part of
what is now Iran*
<https://www.livescience.com/37963-agriculture-arose-eastern-fertile-crescent.html>
.

"We were able to examine different associations between the advent of
farming in that part of the world with the movement of people in that part
of the world," said Narasimhan.

Farming, Narasimhan said, first began in the Fertile Crescent of the Middle
East around 10,000 years ago. No one knows precisely how it spread from
there. Did agriculture pop up independently in areas around the globe,
perhaps observed by travelers who brought the idea to plant and cultivate
seeds back home? Or did farmers move, bringing their new agricultural
lifestyle with them?

In Europe, the genetic evidence suggests that the latter is true: Stone Age
farmers introduced Southern Europe to agriculture, then moved north, *spreading
the practice as they went*
<https://www.livescience.com/19924-agriculture-move-north-europe.html>. But
the new Indus Valley genetic evidence hints at a different story in South
Asia. The Indus Valley individual's genes diverged from those of other
farming cultures in Iran and the Fertile Crescent before 8000 B.C., the
researchers found.

"It diverges at a time prior to the advent of farming almost anywhere in
the world," Narasimhan said. In other words, the Indus Valley individual
wasn't the descendent of wandering Fertile Crescent farmers. She came from
a civilization that either developed farming on its own, or simply imported
the idea from neighbors — without importing the actual neighbors.

Both immigration and ideas are plausible ways to spread farming, Narasimhan
said, and the new research suggests that both happened: immigration in
Europe, ideas in South Asia. The results appear today (Sept. 5) in the
journal *Cell* <https://www.cell.com/cell/fulltext/S0092-8674(19)30967-5>.
Complex populations

The researchers also attempted to link the Indus Valley individual to his
or her contemporaries. In a companion paper published today in the journal
*Science* <https://science.sciencemag.org/cgi/doi/10.1126/science.aay3550>,
the researchers reported on ancient and modern DNA data from 523
individuals who lived in South and Central Asia over the last 8,000 years.
Intriguingly, 11 of these people — all from outside the Indus Valley — had
genetic data that closely matched the Indus Valley Individual. These 11
people also had unusual burials for their locations, Narasimhan said.
Together, the genetic and archaeological data hint that those 11 people
were migrants from the Indus Valley Civilization to other places, he said.

However, these conclusions should be viewed as tentative, warned Jonathan
Mark Kenoyer, an archaeologist and expert on the Indus Valley Civilization
at the University of Wisconsin, Madison, who was not involved in the new
research. Archaeological evidence suggests that Indus Valley cities were
cosmopolitan places populated by people from many different regions, so one
person's genetic makeup might not match the rest of the population.
Furthermore, Kenoyer said, burial was a less common way of dealing with the
dead than *cremation*
<https://www.livescience.com/11366-top-10-weird-ways-deal-dead.html>.

"So whatever we do have from cemeteries is not representative of the
ancient populations of the Indus cities, but only of one part of one
community living in these cities," Kenoyer said.

And though the Indus individual and the 11 potential migrants found in
other areas might have been related, more ancient DNA samples will be
needed to show which way people, and their genes, were moving, he said.

Narasimhan echoed this need for more data, comparing the cities of the
Indus Valley to modern-day Tokyo or New York City, where people gather from
around the world. Ancient DNA is a tool for understanding these complex
societies, he said.

"Population mixture and movement at very large scales is just a fundamental
fact of human history," he said. "Being able to document this with ancient
DNA, I think, is very powerful."
Volume 0

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