This time the post is going to be about a topic that I liked in my curse.
And one of the most interesting things that I have studied this year is the sphenoid bone.This is a bone situated at the base of the skull in front of the temporals and basilar part of the occipital bone. The sphenoid bone somewhat resembles a butterfly or bat with its wings extended.
Well, the interesting thing about this bone is that is central part of a controversy between paleontologists and physical anthropologist because some of them argue that the evolution is slow and steady rise in the natural environment and on the other hand are those who claim that this evolution happens in a phased manner just when the sphenoid changes shape, a form of programmed and attentive, simultaneously.
This last argue is very important for the human evolution, because it explains why our sphenoid changes in the apes. For example, the oldest primate, Lémures of Madagascar, have a completely flat sphenoid, and why, the humans, have a sphenoid curved like a butterfly. If we believe this theory, we have to believe that in the evolution of the human being have been four mutations of the sphenoid bone and even more, that these mutations are taken for genetic causes and simultaneously in all kind of homos (Australopithecus, Homo Sapiens and Homo Sapiens Sapiens). That explains the different evolutions, apparently unrelated geographically, appearing in Europe and Asia.
If you want to know more about this theory, check this websites:
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