A new study suggests that nearly everything archaeologists thought they knew about the 5,300-year-old corpseâs preservation was wrong
Hikers discovered Ătzi the ice mummy in September 1991 in the Tyrolean Alps. Photo by Leopold Nekula / Sygma via Getty Images
In September 1991, German hikers exploring the Tyrolean Alps between Italy and Austria made a shocking discovery: a human corpse. Though officials initially assumed that the man had died recently, archaeologists later revealed that the bodyâwhich had been shot in the back with an arrowâwas roughly 5,300 years old. Somehow, the ice, snow, sun, wind and other conditions of the high-alpine environment had preserved the body for the ages.
The ice mummy later earned the nickname âĂtzi,â a reference to the nearby Ătztal Valley. Since 1998, the South Tyrol Museum of Archaeology in Bolzano, Italy, has housed his body in a special cold cell unit. Visitors can look at Ătzi through a small window, as well as view restored pieces of his clothing and equipment.
The icemanâs reconstruction by Alfons & Adrie Kennis Courtesy of South Tyrol Museum of Archaeology / Ochsenreiter
At the time, researchers assumed that the find was an unusual one-off, the result of a perfect storm of weather and climate conditions that just so happened to coalesce to preserve the bodyâessentially, they thought it was a happy accident.
But new research suggests otherwise. And, as global temperatures rise because of human-caused climate change and ice melts around the world, more historic bodies and other artifacts are likely to surface, according to a new paper published this week in The Holocene.
When archaeologists first began to ponder the conditions that preserved Ătzi, one prevailing theory went like this: Late in the year, the iceman was running away from someone or something, possibly a conflict, and decided to hide out in the mountains. He ultimately died there and quickly became buried in winter snow. Ătzi fell into a shallow gully, which protected him from the movement of glaciers. Then, not long after, the climate evolved and temperatures dropped for hundreds of years, encasing his body in ice.
He remained that way until 1991, scientists agreed, when the snow and ice began to melt away and revealed part of his body.
âThe general understanding was that Ătzi marked this beginning of a cooler period, as people were sure that [he] must have been within the ice without interruption since his death,â says Matthias Huss, a glaciologist at ETH ZĂźrich in Switzerland who was not involved in the new paper, to Scienceâs Andrew Curry.
Scientific examination of the ice mummy Courtesy of South Tyrol Museum of Archaeology / EURAC / Samadelli / Staschitz
Now, however, archaeologists believe there wasnât so much serendipity involved. Some 30 years after the discovery of Ătzi, some researchers decided to take a fresh look at the evidenceâand that led them to a new theory. Based on radiocarbon dating and other analyses of the leaves, seeds, moss, grass and dung found near his body, they believe Ătzi actually died in the spring, rather than the fall, which means his corpse was exposed during the summer. And because some of these organic materials were found to be younger than Ătzi, the team posits that the site was open to the air on multiple occasions during the last 5,300 years. This all points to a different story: that Ătzi was regularly exposed to the elements, not cocooned in an iron-clad, frozen time capsule.
They also now believe that Ătzi died somewhere other than the gully where he was discovered. Archaeologists found his damaged belongings dispersed around the site, which suggests that he died at a higher elevation and that, sometime later, spring and summer runoff or shifting ice likely pushed his body into the gully.
âThe big test is to imagine that Ătzi was found today,â says study co-author Lars Pilø, an archaeologist with the Oppland County Glacier Archaeological Program in Norway, to ScienceNorwayâs Ida Irene Bergstrøm. âWith everything we now know about how glacial archaeological localities work, would anybody have come up with [this] theory? The answer to that is no. We donât need the string of miracles, Ătzi was preserved by regular natural processes.â
Indeed, since Ătziâs discovery, archaeologists have discovered other human bodies, horse remains, skis, hunting gear and other historic artifacts in melting glaciers. Though in the early 1990s, researchers assumed Ătziâs preservation was a fluke, that now seems not to be the case.
Visitors to the museum can view the icemanâs mummy through a small window. Courtesy of South Tyrol Museum of Archaeology / Ochsenreiter
Taken together, these new conclusions go against the long-held belief that Ătziâs death marked the beginning of a long-lasting cold era of the climate.
In addition, as ice continues to melt as a result of global warming, the findings suggest hikersâand researchersâmay want to keep their eyes peeled for even more remarkable finds like Ătzi.
âThe find circumstances of Ătzi are quite normal for glacial archaeology,â the researchers write in the paper. âThe chances of finding another prehistoric human body in a similar topographical setting⌠should therefore be higher than previously believed, since a string of special circumstances is not needed for the preservation of this type of find, and relevant locations are now affected by heavy melt events.â