Thick Skull a Survival Trait

Waffle Iron writes "This article at cnn.com reports: 'Scientists say the bulky craniums of the human ancestor, homo erectus, may have helped the species survive some aggressive mating rituals. After studying fossils in a region called Dragon Bone Hill in China, anthropologist Russell Ciochon of the University of Iowa concluded males of the species were clubbing one another over the head, probably to win females.' However, the geekier cavemen may have won out at the end. The article goes on to say: '...evolution eventually favored a lighter skull to accommodate a heavier and larger brain'."