Claims about skeletal differences are probably pretty well supported by physical evidence, and again, it's a reasonably small difference in size and scale.
Differences in facial structure seem likely just from differences in skeletal structure, our face maps pretty closely to skeptical structure. But also, we can see pretty wide genetic variation in facial structure in humans, e.g. https://en.wikipedia.org/wiki/Julia_Pastrana
Humans are pretty cannibalistic already, I don't buy his evidence that neanderthals were, but a human could survive on an almost entirely meat diet, no reason to think neanderthals weren't more inclined to.
Pupil shape seems like the farthest out there, but there is variation in pupil shape within the human population too. It's plausible... again I don't really buy his evidence as proof https://en.wikipedia.org/wiki/Coloboma
In general I don't think this article is meant to say "they looked exactly like this", but "they probably looked monstrous", if it turns out there pupils were the same as humans, but also they had sharper more claw like nails, the point wouldn't change in the slightest.
Claims about skeletal differences are probably pretty well supported by physical evidence, and again, it's a reasonably small difference in size and scale.
Differences in facial structure seem likely just from differences in skeletal structure, our face maps pretty closely to skeptical structure. But also, we can see pretty wide genetic variation in facial structure in humans, e.g. https://en.wikipedia.org/wiki/Julia_Pastrana
Humans are pretty cannibalistic already, I don't buy his evidence that neanderthals were, but a human could survive on an almost entirely meat diet, no reason to think neanderthals weren't more inclined to.
Pupil shape seems like the farthest out there, but there is variation in pupil shape within the human population too. It's plausible... again I don't really buy his evidence as proof https://en.wikipedia.org/wiki/Coloboma
In general I don't think this article is meant to say "they looked exactly like this", but "they probably looked monstrous", if it turns out there pupils were the same as humans, but also they had sharper more claw like nails, the point wouldn't change in the slightest.