‘Researchers in the US have studied the skulls of ancient human ancestors and concluded that fist-fighting may have played a role in shaping the male face.The new study is published in Biological Reviews, and it isnt the first time scientists have suggested the idea. As George Dvorsky reports for io9, back in 2012 researchers controversially made the claim that fists had changed the course of our evolution. Now the new theory, based on the study of the skulls of distant hominid relatives known as australopiths, is likely to stir up similar debate over the role violence has played in human evolution.’ (Science Alert).