Stone Age Burial Mystery as Remains Are Found to Be Missing Skulls

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Research has yielded fascinating new insights into a Stone Age burial site in Sweden where archaeologists have documented a mysterious set of human remains.

The grave in question is a dolmen, a type of single-chamber prehistoric tomb constructed using large stones. It is located in the Tiarp parish in the geographical area of Falbygden—which is centered around the town of Falköping in southwestern Sweden.

Hundreds of dolmens have been found in north-central Europe and southern Scandinavia alone. The Tiarp dolmen, which is surrounded by cultivated agricultural land today, was originally discovered in 1929 when a farmer cleared a mound. It was studied by archaeologists at the time and then again in 2014, which was when researchers discovered that the grave was more or less intact and had bodies buried inside.

An archaeological excavation is seen at the dolmen in Sweden in the summer of 2023. Research has revealed that the megalithic tomb was likely constructed around 3500 B.C.

Cecilia Sjöberg/University of Gothenburg

But a team of researchers from Sweden’s Gothenburg University and Germany’s Kiel University, Germany, wanted to investigate further to uncover the dolmen’s secrets. In the summer of 2023, the archaeologists excavated the dolmen, and a subsequent analysis of the grave has yielded important new information.

The study, which has been published in the Journal of Neolithic Archaeology, has confirmed that the tomb is one of the oldest stone burial chambers in Sweden and across all of Scandinavia.

The team’s dating work revealed that the grave was likely constructed around 3500 B.C. during the Early Neolithic period and was likely used for burials in two different phases. The first was around 3500 to 3400 B.C., while the second was from 3400 to 3300 B.C.

The researchers also determined that the bones in the grave—most of which date to the first phase—belong to at least 12 people, including infants and elderly individuals.

One puzzling aspect of the remains is that some parts of the people buried in the grave are missing or are few in number, including skulls and large bones such as those of the thigh and arm. At the same time, the researchers found that small bones of the hands and feet are well represented, together with teeth and rib fragments—an unusual discovery.

“This differs from what we usually see in megalith graves, i.e., stone burial chambers from the Neolithic period,” Karl-Göran Sjögren, an archaeologist with Gothenburg University, said in a press release. “Usually, the bones that are missing are smaller bones from feet and hands.”

Archaeological observations and soil analysis at the grave point to the integrity of the ground layers in which the remains were found. This suggests that the missing bones must have been removed in the Early Neolithic period, but the reason why remains a mystery.

A map shows the location of the hamlet of Tiarp, in Sweden's Tidaholm municipality.

“Skulls and large bones are missing and may have been removed from the grave. We don’t know whether that has to do with burial rituals or what’s behind it,” Sjögren said.

It is also unclear how the individuals buried in the grave died, something the researchers are attempting to ascertain.

“We haven’t seen any injuries on the people buried so we don’t think violence is involved. But we are continuing to study their DNA, and that will show whether they had any diseases,” Sjögren said.

Using DNA analysis, the researchers are also trying to determine whether the individuals in the grave are related.

“The preliminary DNA results show that the DNA in the bones is well preserved. This means we will be able to reconstruct the family relationships between the people in the grave, and we are working on that now,” Sjögren said.

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