Touche
And I forgot, Do you agree with the article? They are using a gorilla skeleton to illustrate their point apparently.
My off the cuff opinion as a layman is that the research seems sensible, rigorous and relevant, but for all that a pretty weak basis for the conclusion. Certainly it demonstrates that the data is not inconsistent with the aggression hypothesis, and there's some value in that, but I don't think the data is strong enough to establish that male fighting was a significant adaptive force here.