Neanderthal Infant Remains Reveal New Insights into Early Development
A new study of Neanderthal infant remains from 50,000–75,000 years ago has provided fresh evidence about their developmental trajectory, revealing both similarities and differences compared to modern human babies.
A Decades-Old Discovery, Reexamined
The remains were unearthed at Sesselfelsgrotte, Germany, during excavations in the 1960s and 1970s. They were confirmed as Neanderthal around 20 years ago, but only now have modern imaging techniques allowed researchers to study them in detail.
Using micro-computed tomography (micro-CT), scientists documented the internal structure of the fragile specimens. Dr. Justyna Miszkiewicz, a skeletal histologist at the University of Queensland, led the analysis.
Key Findings: Growth Patterns and Bone Structure
The study found patterns in bone tissue typical of a rapidly growing fetal skeleton. However, some long bones—such as the femur and humerus—showed notable differences:
Regions of increased compactness and structural organization suggested more advanced growth than a typical modern human baby.
Despite these localized differences, the researchers concluded that overall development during early life was broadly similar to modern humans.
Dental Defects Point to Early-Life Stress
Co-lead Dr. Ricardo Miguel Godinho from the University of Algarve highlighted findings from micro-CT scans of molar teeth:
Unusual mineralization defects within the dentine, consistent with interglobular dentine, were detected—a condition that forms when tooth mineralization is interrupted.
These defects likely indicate systemic disturbances, such as:
- Vitamin D deficiency
- Calcium deficiency
- Impaired calcium absorption
The defects are thought to have formed between the third trimester and the child's second year, suggesting periods of physiological stress during a critical window of development.
What Comes Next
The researchers emphasized that further high-resolution and multi-method studies would help refine interpretations of early Neanderthal growth and the origin of the dental defects.