While this video was originally posted December 2010, it is the first time that I had come across this concept of the behaviour of Neanderthals. It is nothing that I can dispute but I think should be revisited. Here is a comparison of two skulls.
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What we see is a comparison between a modern human (on the left) vs a Neanderthal skull from about 70,000 years ago. (I apologize for the citation on this image but it is used commonly however I am dubious of the origins as no Neanderthal skull is in such good condition).
Compare the image of a human vs a gorilla.
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There are clear differences between the two skulls while less so except for size with Neanderthals.
Contrast these two skulls:
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This is the difference between a modern skull and a skull from the medieval period.
It was found that changes existed in almost every mandibular dimension between the medieval and post-medieval period. These changes included a reduced mandibular width and ramus height and an increase of the gonial angle (the angle of the posterior corner of the lower jaw).
While not readily apparent there have been significant differences between human skulls just withing the last 1000 years ... mainly due to the type of diet. Imagine how our muscles would develop if all we did was eat our food by sipping it through a straw. Those muscles change the way the bones develop. Most modern humans have a slight overbite - because we cut our food instead of tearing at it with our teeth (think of medieval feasts, Henry VIII and turkey legs).
Concluding that Neanderthals were more carnivorous than humans from that time period is flawed if one comparing with North Americans (living on pudding and custard).