Scientists at a leading laboratory in the United States are using a cutting-edge form of X-ray to scan inside an Egyptian mummy that has never been unwrapped since its excavation a century ago.
This is the first time that such a high intensity synchrotron X-ray will have been used on a mummy, with the aim of producing an extremely detailed three-dimensional analysis of the body and any other objects hidden below the linen bindings.
This is also an unusual mummy, because not only has the body been preserved, but so too has a portrait of the child’s face.
This mummy, from a collection on the campus of Northwestern University in Chicago, is believed to contain the body of a five-year-old girl, who died about 1,900 years ago.
Not only was her body mummified, her portrait was painted and placed on top of the cloths wrapped tightly around her.
It’s one of only about 100 such “portrait mummies” known to exist intact, with the Egyptian process of mummification being accompanied by the Roman style of portraying the dead.
The painting provides an unusually intimate image of how the girl once looked – and the scanning project is trying to reveal much more about her life and death, without disturbing any of the layers of cloth around her body.
Marc Walton, research professor of materials at the McCormick School of Engineering at Northwestern, told the BBC it’s “quite emotional when one realises how young this child was at the time of her death”.
Prof Walton says the investigation so far suggests that she had been “relatively healthy and that she didn’t have any blunt force trauma that could explain her death”.
He says that the most likely cause of death was a disease such as malaria or measles.
The mummy had been excavated in 1911 by the English archaeologist, Sir William Flinders Petrie, in Hawara in Egypt, and was brought the following year to a college in Chicago.
Since then, the mummy has been put on display and appeared in exhibitions, but has been left intact, unlike many that were cut open.
But this year, for the first time, researchers have begun looking inside.
In the summer, the mummy was taken from its current home, the Garrett-Evangelical Theological Seminary, on the Northwestern University campus, and brought to a hospital in Chicago for a preliminary CT scan.
Then last week, the mummy was brought to the Argonne National Laboratory, a top research centre operated by the University of Chicago for the US Department of Energy.
The mummy became the first to be examined using synchrotron X-rays. This process sends narrow beams of intense light to map any structures below the surface.
Medical researchers want to examine the bone tissue and teeth. The investigation is at an early stage, but there are also questions about what seems to be an object inside the skull, presumably after the brain was removed as part of the mummification.
Analysing ancient bone
Prof Walton says it seems to be “pooled resin from the embalming process” which has settled in the back of the skull.
The researchers are hoping that this will tell them something about the positioning of the body and the process of mummification.
There are also signs of some kind of wire around the head and feet.
But Prof Walton suggests these might be modern pins, rather than ancient artefacts, perhaps inserted after or during the excavation in 1911.
“We are still trying to understand their exact purpose in holding together the wrappings,” he says.