When are we responsible for our own actions, and when are we in the grip of biological forces beyond our control? This intriguing question is the scientific province of behavioral biology, a field that explores interactions among the brain, mind, body, and environment that have a surprising influence on how we behave—from the people we fall in love with, to the intensity of our spiritual lives, to the degree of our aggressive impulses. In short, it is the study of how our brains make us the individuals that we are.
Scientific mysteries are everywhere around you. At the bottom of the deepest oceans. On the frontiers of the known universe. But some of life's greatest scientific mysteries lie much closer than that: inside the recesses of the human mind.