Study: Human species has inherited murderous tendencies

CBS- Evolution and genetics seem to have baked a certain amount of murder into humans as a species, but civilization has tamed some of the savage beast in us, according to a new study.Scientists calculated the rate at which more than 1,000 mammal species kill their own kind, and noticed how closely related species have similar rates of lethal violence. They essentially found that where a species is on evolutionary tree of life tells a lot about how violent the species is to its own kind. And we&