For an article titled 鈥淭he Evolution of Hand Gestures: Why Do Some Die Out and Others Endure?鈥�, The Atlantic magazine contacted Spencer Kelly, associate professor of psychology, for his expertise on hand gestures. The article examined two kinds of hand gestures. The first are 鈥渃o-speech gestures鈥�, unconscious ways we move our hands as we talk. Professor [鈥
June 10, 2013