Look in the mirror. The face that pins you with its double gaze reveals a chastening secret. You are looking into a predator's eyes. Most predators have eyes set right on the front of their heads, so they can use binocular vision to sight and track their prey.
Bio: Megan McArdle is a journalist and blogger based in Washington, D.C.. She writes mostly about economics, finance and government policy from a libertarian perspective.
