The shape of your brain may say a lot about the Neanderthal in you. New research has found that modern humans carrying certain genetic fragments from our closest extinct relatives may have more oblong brains and skulls than other people. Modern humans possess unique, relatively globular skulls and brains. In contrast, the closest extinct relatives of modern humans, Neanderthals, have the elongated skulls and brains that are typical of most primates. Previous research had suggested these contrasting skull shapes might reflect differences in the size of various brain regions in modern humans and Neanderthals, and how these brain areas were...