Are there differences between what we can learn from casts and actual fossils? Paleoanthropologists are skeptical that H. erectus had anything more than a simple proto-language because it is not...

Are there differences between what we can learn from casts and actual fossils?

Paleoanthropologists are skeptical that H. erectus had anything more than a simple

proto-language because it is not cranial features and capacity alone that enable

“articulate speech.” What other bodily characteristics do you think would need to

be in place for language to develop?