> Eating bone marrow played a key role This conclusion is a big leap, even as per the article you shared. "The strength required to access the high calorie con

> Eating bone marrow played a key role This conclusion is a big leap, even as per the article you shared. "The strength required to access the high calorie content of bone marrow may have played a key role in the evolution of the human hand and explain why primates hands are not like ours, research has found." It's just a possibility. They can't even make a strong claim about it.