Levistus's_Leviathan
5e Freelancer
Hmm, that's news to me. I don't think many people would be looking at their thumbs. If they were, that wouldn't set them apart as a different species. I mean, look at this person's thumb:Except, apparently if you look at their thumbs which apparently may have been better for holding spears and such but not as good at fine manipulation.
I don't think we really know if they were less intelligent than us. They had language and similar tools, but just were more "loners" than us Homo Sapiens."You know, the dumbasses?"