Do eternally optimistic people just have malfunctioning frontal lobes?

From an evolutionary perspective, excessive optimism is generally a bad idea. After all, if you're constantly assuming good things will happen, you'll probably be ill-prepared when bad things inevitably come along. Now scientists have an explanation...which isn't exactly flattering to the eternally optimistic. » 10/10/11 11:40am 10/10/11 11:40am