When comparing the four groups, the primate that had the largest skull or supraorbital height (SHI) was the H0m0sapiens (Modern human).
How did the skull evolve?
Through the last three million years, from Australopithecus to H0m0 sapiens, the skull has suffered many modifications related to shape and size.
The cranial capacity increased to fit the brain size and protect it. The face got flattered as well as the chin, and teeth got smaller in size.
The increase in brain size might explain the higher capacity to learn and think.
What do skull size and supraorbital height indicate?
The size of the skull and the supraorbital height are indicators of brain size and hence, evolution.
Because the cranial cavity houses the brain, a larger skull reflects a bigger brain.
Pan troglodytes and Australopithecus have the smallest cranial sizes, expressed by a shorter skull and supraorbital height.
These measures suggest that their brain is not as developed as other groups.
H0m0erectus and H0m0sapiens showed the largest skulls and supraorbital height, reflecting their more developed brains.
H0m0sapiens is the group with the largest skull or supraorbital height. It is the most evolved group.
The primate that had the largest skull or supraorbital height (SHI) was the H0m0sapiens (Modern human).
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