The jaw bone is frequently fractured in fist fights and was strengthened in some of our evolutionary ancestors
A new theory suggests that our male ancestors evolved beefy facial features as a defence against fist fights.
The bones most commonly broken in human punch-ups also gained the most strength in early "hominin" evolution.
They are also the bones that show most divergence between males and females.
The paper, in the journal Biological Reviews, argues that the reinforcements evolved amid fighting over females and resources, suggesting that violence drove key evolutionary changes.Read the rest of this article...