In this issue, you’ll learn how Amazon’s massive investments in technology are shaping the future for retailers everywhere. You’ll hear why major Internet companies are spending millions in order to deliver just about anything within a few hours. You’ll learn why Twitter may be making major interface changes. You’ll hear how a startup is offering a real-time way to track how economies are doing. You’ll learn how a new technology can read people’s feelings and predict the statistical likelihood of their later behavior. And you’ll hear news from the worlds of Biomedicine, Technology and Communications.