An
international research team, has just published a study describing for the
first time the developmental processes that differentiate Neanderthal facial
skeletons from those of modern humans.
This study showed
that the Neanderthals, who appeared about 200,000 years ago, are quite distinct
from Homo sapiens (humans) in the manner in which their faces grow.
Bone
is formed through a process of bone deposition by osteoblasts (bone-forming
cells) and resorption by osteoclast (bone-absorbing) cells, which break down
bone. In humans, the outermost layer of bone in the face consists of large
resorptive fields, but in Neanderthals, the opposite is true: In the outermost
layer of bone, there is extensive bone deposition.
Neanderthals were always considered to be a very different category of hominin, but i fact they share with older African hominins a similar facial growth pattersn. It is actually humans who are developmentally derived, meaning that humans deviated from the ancestral pattern. . In that sense, the face that is unique is the modern human face, and the next phase of research is to identify how and when modern humans acquired their facial-growth development plan.
Neanderthals were always considered to be a very different category of hominin, but i fact they share with older African hominins a similar facial growth pattersn. It is actually humans who are developmentally derived, meaning that humans deviated from the ancestral pattern. . In that sense, the face that is unique is the modern human face, and the next phase of research is to identify how and when modern humans acquired their facial-growth development plan.
In
our opinión, it is an amazing research because it provides important information
about human evolution, because some think that Neanderthals and humans should
not be considered from different branches of the family tree. But those
discoveries provide enough evidence to affirm that those two groups are
sufficiently different from one another.
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