By Rob Dunn in Smithsonian "Cultures differ in all sorts of ways—their greetings, clothing, expectations about how children should behave, coming-of-age rituals, expressions of sexuality, numbers of husbands or wives, beliefs in god, gods, or lack thereof. People celebrate but also wage wars about...

By Katherine Harmon | Scientific American "If love is said to come from the heart, what about hate? Along with music, religion, irony and a host of other complex concepts, researchers are on the hunt for the neurological underpinnings of hatred. Functional magnetic resonance imaging (fMRI) has begun...