A historic center of learning, scholarship and artistic achievement in Paris, The Latin Quarter's mystique is well-merited. Unfortunately, the area is also a bit of a victim of its own popularity: it can be hard to see through some of the tourist-trap artifice to get at the fascinating heart of this beloved neighborhood.

Science suggests that there are unusual things happening in the brains of power-holders. Decades of study have shown that the psychology and physiology of powerful people are notably different from those of average people – down to the architecture of the brain’s prefrontal cortex, and the way the heart pumps blood.