3D Scans of Neanderthal Heels Reveal Flat Feet Built for Heavy Loads
Researchers at the University of Bologna found that Neanderthal foot architecture maximized stability on rugged ground, while modern rigid footwear weakened human heels.
Seven fossilized Neanderthal heels scanned in three dimensions showed that the ancient hominids had flat feet adapted to balance heavy loads across rough terrain. A team led by the University of Bologna compared the specimens against 64 Homo sapiens skeletons, publishing the discovery in the Journal of Human Evolution on November 4, 2026. The morphological contrast reveals how daily activity and footwear reshape the human skeleton over generations.
Three-dimensional imaging of fossil heels
Anthropologists have debated the walking mechanics of extinct hominids for decades. To resolve how Neanderthals moved, lead author Rita Sorrentino and a team coordinated by Maria Giovanna Belcastro, a professor at the Department of Biological, Geological, and Environmental Sciences of the University of Bologna, examined calcaneal bones using advanced digital imaging.
The team applied 3D geometric morphometry to digital models generated through laser scanning and computed tomography. Their analysis, published in the Journal of Human Evolution, evaluated seven Neanderthal heels alongside 64 Homo sapiens heels. The modern human sample spanned Pleistocene hunter-gatherers, Iron Age farmers, and an urban collection from the Certosa Cemetery of Bologna. This technique captures shape variations that standard two-dimensional measurements miss, creating an anatomical baseline for evolutionary innovation.
“The morphology of our skeleton is not only the product of a strict genetic program, but also the consequence of physical stimuli and our daily life habits.”
— Maria Giovanna Belcastro, professor at the University of Bologna
Biomechanical stability on mountain ground
The digital scans revealed that Neanderthal heels were shorter, wider, and taller than those of modern humans. In addition, their heels showed a lower lateral longitudinal arch. This structural feature meant Neanderthals walked with flat feet.
Their posture habitually exhibited pronation, where the foot rolls inward during ground contact. While modern medicine often treats flat feet as an orthopedic defect, the trait served as an effective functional adaptation for Neanderthals. Belcastro explained in the report by Phys.org that "the robustness of the heel reflects the overall body structure of Neanderthals, which is characterized by remarkable muscle and bone mass and an extremely intense level of physical activity." The flatter shape provided a broader base, helping them carry heavy game across steep slopes.
How modern shoes altered the human foot
The study also tracked skeletal changes within Homo sapiens across different cultural eras.
Prehistoric human hunter-gatherers walked barefoot or wore soft hide wraps. Their calcaneal bones showed a structural density similar to Neanderthals. By contrast, urban populations from recent centuries showed marked skeletal gracilization. The team found that sedentary living and stiff soles alter bone growth. Rigid shoes restrict natural foot inversion and eversion, which tightens the ankle joint and deprives bone tissue of mechanical stress.
Anthropological data for modern orthopedics
No patent application or formal claim of intellectual property covers these prehistoric fossils, but the underlying biomechanical insights carry practical weight for footwear design. Belcastro noted that "the morphology of our skeleton is not only the product of a strict genetic program, but also the consequence of physical stimuli and our daily life habits."
The study offers clinical orthopedists empirical evidence on how rigid footwear alters natural joint mobility. Future research will evaluate other lower limb joints across fossil records to clarify how human walking mechanics continue to adapt.
Read also on The Patent: Egyptian Ape Fossil Shifts the Geographic Roots of Modern Primate Evolution
