The incredible variety of faces in the world is the result of evolutionary pressure to make each of us unique and recognizable. Yet many of us do not value the unique traits each of us was born with. A new study by the University of California explains how facial traits vary more than body traits. The most variable traits are in the “triangle region” between the eyes, nose and mouth. The eyes, mouth, nose, ear, all have unique features and characteristics. All added together, they make a unique you. 1 in 7 billion.