Bone thickness of a human skull. Three-dimensional Computed Tomography (CT) scan of the skull of a human child, in side view. The parietal bone is mapped in colours depicting bone thickness: light blue to yellow (0.5-2.5 millimetres); red to dark blue (3-5 millimetres). The bone thickness mapping by computer shows local variation of thickness in the human skull. This map was used to compare human skull thickness with fossil skull thickness of a Neanderthal child found at Devil's Tower, Gibraltar. Human skulls prove to be thinner than Neanderthal skulls. Research at the Anthropologis- ches Institut, University of Zurich, Switzerland.
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