http://www.biologynews.net/archieves/2011/01/05/prehistoric_bird_used_clublike_wings_as_weapon.html
At Yale University scientists known as Palentologists, discovered a new type of bird know as the Xenicibis. The Xenicibis is a prehistoric bird in the Ibis family that is known for its special combat like wings. The wings of this bird fought of predators by being stroke by them. The thick, curved structure of the bones allowed the bird to give off a powerfull impact. Only few modern Ibises can still do this.
I think that this proves that we are more like are ancestors then we think. Even though this is a new discovery to find that this bird had wings that were made for weapons, we know that there are species in mordern day that have similar wings. It makes me wonder what Palentoligsts will find out about our past next. Maybe humans had different bone structures that helped us protect ourselves?