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