Douglas Kennett, Penn State University
Douglas Kennett, Penn State University

Scientists Find Genetic Evidence of Matrilineal Dynasty at Chaco Canyon 

Douglas Kennett, Penn State University
Douglas Kennett, Penn State University

Archaeologists in New Mexico say the remains of nine high-status individuals suggest a prehistoric society dependent on matrilineal relationships. They published their findings in the journal Nature Communications.

New Mexico’s famed Chaco Canyon was once home to a complex, thriving society. From the 9th to the mid-12th centuries, thousands of people lived and worked in immense, ingeniously designed earthen buildings called great houses.

George Perry, Penn State University

Sections of some of these great houses still stand in the canyon today. The largest is Pueblo Bonito, which contains some 650 rooms used for a wide variety of purposes. Room 33 was a burial chamber. Based on the beautiful objects found in the room with the bodies, it seems to have served as the final resting place for some very important people.

“It has been clear for some time that these were venerated individuals, based on the exceptional treatment they received in the afterlife. Most Chacoans were buried outside of the settlement and never with such high quantities of exotic goods,” co-author Adam Watson of the American Museum of Natural History (AMNH) said in a statement.

Roderick Mickens © American Museum of Natural History


Roderick Mickens © American Museum of Natural History

To learn more about these people, researchers extracted tiny samples from the roots of the deceased’s teeth. They brought these samples back to the lab, liquefied them, and sequenced their DNA, hoping to find clear genetic relationships.

They found them. The results showed that the nine individuals interred in Room 33 had lived and died over the course of 330 years—about the same timeline as the culture itself. And all the power players buried in this high-status room were, in fact, related on their mothers’ sides, as evidenced by their identical mitochondrial DNA, which is exclusively passed from mother to child. In other words, each person in that room was there because their mother or grandmother had been somebody important.

The fate of these advanced, fascinating people remains something of a mystery to archaeologists. Environmental conditions may have forced them to leave the canyon, or they may have been relocated or wiped out by Spanish forces. But they may also have migrated outward and become part of nearby Native American tribes.

"This work confirms what Pueblo people have been saying for a long time, that the matrilineal system that guides their society today goes back not just a century, but many hundreds of years," co-author Peter Whiteley, of AMNH, said in the statement. “It honors the Pueblo sense of their own history, and it’s only possible now because of the melding of all of these different aspects of anthropology—archaeology, biology, and ethnology.”

Justin Tallis, AFP/Getty Images
Stones, Bones, and Wrecks
8 Cemeteries Unearthed at Construction Sites
Justin Tallis, AFP/Getty Images
Justin Tallis, AFP/Getty Images

The people who lived before us are often just beneath our feet, even if their tombs are sometimes forgotten. Lost under urban development, they are rediscovered when a subway, building, or other structure claims the ground for progress. Here are eight burial sites that came to light in this unconventional manner.


The construction of Rome's subway has unearthed everything from a 2nd-century home decorated with mosaics and frescos to a 2300-year-old aqueduct. The San Giovanni station, slated to open in 2018, will feature displays of artifacts found during its excavation, such as Renaissance ceramics and the remains of a 1st-century agricultural fountain.

Back in 2016, extension work on Line C ran into a 2nd-century military barracks with 39 rooms, likely used by Emperor Hadrian's army, as well as a mass grave of 13 skeletons. The dead may have been members of the elite Praetorian Guard, protectors of the Roman emperor. Investigations are ongoing, although officials have planned for the barracks to be incorporated into the station architecture. Its opening date remains in limbo as archaeological finds continue to slow its construction.


In 1991, construction of a federal office building revealed a colonial-era burial ground in Lower Manhattan. The graves, dating back to the 1690s, had been lost due to landfill and development, yet were identified as part of the African burial grounds that in the 17th century were located outside the old city.

Banned from interment in white cemeteries, free and enslaved Africans and African Americans had established a place to give respect to their dead, with an estimated 10,000 to 20,000 burials. Thanks to grassroots activism, including protests against continued construction, the site is now commemorated with the African Burial Ground National Monument, which opened in 2006.

It's not the sole black cemetery to be buried under development in New York: The Second African Burial Ground, dating from the 18th and 19th centuries, is located below today's Sarah D. Roosevelt Park on the Lower East Side; and in East Harlem, a 17th-century slave burial ground, discovered by construction workers at a bus depot, awaits a planned memorial.


Burrowing deep under London, the ongoing Crossrail commuter rail project has exposed obscure layers of the city's past—and a treasure trove of history. Along with medieval ice skates and a Tudor bowling ball, archaeologists have identified two mass graves. One has 13 skeletons of people who probably died in the 14th century of Black Death (with DNA on their teeth still holding the plague bacterium Yersinia pestis); a larger site has 42 skeletons of victims of the Great Plague of 1665. The study of the Great Plague skeletons, excavated in 2015 by Museum of London Archaeology, similarly showed traces of the disease in their old teeth. (Luckily the bacteria is no longer active, so no need to dust off your plague doctor beak mask.)

While such "plague pits" have long been rumored—some urban legends say the London Underground had to curve to avoid messy heaps of bodies—study of the sites indicated that there was in fact great care taken with the deceased. The bodies were placed in individual coffins, giving them some dignity even in this hasty mass burial.


Sometimes, to borrow a line from Poltergeist, people only move the headstones when relocating a cemetery, and stray bones and coffins are left behind (digging up the dead is generally unpleasant work). That seemed to be the case with a graveyard unearthed at a construction site on Arch Street in Philadelphia in March 2017. The dozens of coffins that were discovered are believed to be part of the First Baptist Church Burial Ground, established in 1707 and supposedly moved to Mount Moriah Cemetery in 1859. The Mütter Institute spearheaded a crowdfunding campaign for analysis and reinterment of the bones, and volunteer archaeologists convened at the site, racing against time to map the grounds and remove the burials of more than 100 people. Their remains were carefully analyzed.

Archaeologists subsequently found the remains of more than 400 people at the site as construction went on in other areas. Building at the site continues, as does the grassroots-funded research on the bones (you can follow the team's progress at the Arch Street Bones Project website).


In 2013, construction on a subway in Thessaloniki, Greece, turned up the grave of a woman buried around 2300 years ago. The Early Hellenistic lady was interred with a gold olive branch wreath.

Surprisingly, this wasn't the first such skeleton found during subway construction to be so regally crowned. In 2008, another Hellenistic woman was discovered with four gold wreaths and gold earrings in the shape of dogs' heads, all indicators of wealth and respectability—something marred a bit by the sewage pipe that had wrecked part of her grave.


While digging a trench in 2013 for a gas pipeline in Saskatchewan, Canada, a contractor noticed bone fragments in the soil that turned out to be 1000-year-old human remains.

Construction was halted so First Nations elders and archaeologists could examine the area. Ultimately, the pipeline company opted to tunnel deeper to avoid disturbing the ancient burials.

It was only one of many instances of massive infrastructure projects coming in contact with pre-colonial burial grounds. In 2017, for example, road construction in Duluth, Minnesota desecrated graves when the state's department of transportation failed to evaluate the area for artifacts prior to breaking ground.


Near Weymouth in Dorset, England, a mass grave of more than 50 young men was discovered in 2009 by archaeologists doing a survey before road construction began. All the victims had been killed brutally, at once, with multiple blows from a sharp weapon visible on their bones, and their heads had been severed. In 2010, researchers identified them as Vikings by radio-carbon dating the bones to 910 to 1030 CE, when the English clashed with Viking invaders. Analysis of the isotopes in the teeth indicated Scandinavian origins. Due to their lack of clothing and their similar manner of death, they were likely executed as captives. They're now part of the Dorset County Museum.


Among the roughly 38,000 people interred beneath a neighborhood on Chicago's Far Northwest Side are the impoverished inmates of the Cook County almshouse and patients from the county insane asylum. The area was known as Dunning, and its squalid institutions were so well known that a judge in 1889 declared them a "tomb for the living." The 20 acres of the site also included a potter's field for the indigent and unclaimed, and the burials of more than 100 unidentified dead from the Great Chicago Fire of 1871.

The potter's field was revealed in 1989 during construction on luxury homes. Sewer workers who were laying pipes also turned up a corpse that was so well-preserved his handlebar mustache was still visible. Bodies were relocated to a site now called Read-Dunning Memorial Park, giving these dead some recognition in the city for the first time.

University of York
Stones, Bones, and Wrecks
UK Archaeologists Have Found One of the World’s Oldest 'Crayons'
University of York
University of York

A prehistoric chunk of pigment found near an ancient lake in England may be one of the world's oldest crayons, Colossal reports. The small object made of red ochre was discovered during an archaeological excavation near Lake Flixton, a prehistoric lake that has since become a peat wetland but was once occupied by Mesolithic hunter-gatherers. Though it’s hard to date the crayon itself, it was found in a layer of earth dating back to the 7th millennium BCE, according to a recent study by University of York archaeologists.

Measuring less than an inch long, the piece of pigment is sharpened at one end, and its shape indicates that it was modified by a person and used extensively as a tool, not shaped by nature. The piece "looks exactly like a crayon," study author Andy Needham of the University of York said in a press release.

A pebble of red ochre thought to be a prehistoric crayon
University of York

The fine grooves and striations on the crayon suggest that it was used as a drawing tool, and indicate that it might have been rubbed against a granular surface (like a rock). Other research has found that ochre was collected and used widely by prehistoric hunter-gatherers like the ones who lived near Lake Flixton, bolstering the theory that it was used as a tool.

The researchers also found another, pebble-shaped fragment of red ochre at a nearby site, which was scraped so heavily that it became concave, indicating that it might have been used to extract the pigment as a red powder.

"The pebble and crayon were located in an area already rich in art," Needham said. "It is possible there could have been an artistic use for these objects, perhaps for coloring animal skins or for use in decorative artwork."

[h/t Colossal]


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