The frontal bone of the Hahnöfersand fossil
A new 3D analysis puts an end to decades of speculation about whether a fossil found on the banks of the River Elbe in Germany was a hybrid of Neanderthal and modern human. After all, it was all A wise man!
For almost half a century, a human skull fragment discovered on the banks of the River Elbe, near the German town of Hahnöfersandwas at the center of one of the most persistent debates in .
Found in March 1973 during the construction of a dam, the frontal bone — the part of the skull that forms the forehead and roof of the eye sockets — was well preserved but lacked a secure archaeological context.
It was initially dated to around 36 thousand yearsand described as having a disconcerting combination of traits from modern humans and Neanderthalswhich fueled a bold hypothesis: could be a hybrid between the two species?
A new one, published last week in the magazine Scientific Reportsresolves the issue definitively.
Led by Carolin Rodingresearcher at the Senckenberg Center for Human Evolution and Paleoenvironment at the University of Tübingen, the research now applies an advanced method of three-dimensional surface analysis to the complete form of the fossil — and concludes, without any ambiguity, that the Hahnöfersand fossil belongs to a A wise man modernwithout traces of intermediate morphology.
When the anthropologist Günter Brauer examined the specimen in 1980, came across what looked like a morphological contradiction: the forehead was flata characteristic of Neanderthals, while the region of the supraorbital rim presented typically sapiens traits.
These data, combined with radiocarbon dating that placed the fossil in period in which both species coexisted in Europe, Bräuer interpreted the find as a possible sign of hybridization.
The first fracture in this interpretation emerged in 2001, when Thomas Terberger and colleagues a revised dating using more reliable techniques.
The results of Terberger’s study dated the Hahnöfersand fossil to around 7500 years old, placing the mysterious specimen in the middle of the Mesolithicthousands of years after the disappearance of Neanderthals from Europe.
However, as the revised dating was published in German and in a format difficult to access for the international community, the fossil continued to appear in scientific literature as hybrid potential for yearsnote or .
Roding’s team has now closed the case with a methodology that surpasses the limitations of both traditional visual assessment and morphometry conventional geometric.
The approach used, known as surface registration methodanalyzes the entire bone surface as a set of three-dimensional coordinatess, rather than relying on a handful of anatomical reference points—a significant advantage when working with incomplete remains.
The researchers compared Hahnöfersand with 44 surface models obtained by computer tomography and surface scanning, including Late Pleistocene Neanderthals, Middle Pleistocene European hominins and representations of A wise man from the Late Pleistocene to the medieval period.
The analysis allowed Roding’s team to unequivocally fit the fossil into the variability of Holocene Homo sapiens.
So why was a modern human mistaken for a possible hybrid? The study identifies three determining factors.
In the first place, a robust individual may appear to exhibit Neanderthal traits simply due to the anatomical context surrounding genuinely sapiens characteristics.
Secondly, the forehead slope interpretation of an isolated fragment depends critically on the orientation assigned to the bone — an uncertainty that Bräuer himself acknowledged.
Thirdly, human variability is wider than is often assumed. You A wise man Late Pleistocene populations have, on average, more robust skulls than later populations, partially overlapping the morphology of Neanderthals and Middle Pleistocene hominins.
The study also reveals a broader and more fascinating pattern: Upper Paleolithic Europeans occupy an intermediate morphological position between Neanderthals and recent modern humans, a finding consistent with known Neanderthal ancestry present in all ancient European genomes sequenced to date.
A bone fragment taken from the Elbe mud in 1973 required more than fifty years and several technological revolutions to reveal his true identity: that of a Mesolithic European, neither hybrid nor mysterious, simply human.
The story of this German fossil reminds us that science advances not only through new discoveries, but also, as we often make known in ZAP, by critically reexamining what we thought we already knew — in light of new technologies and alternative approaches.
