Thanks to the digital revolution, our world has changed dramatically. In a new book, British neuroscientist Susan Greenfield examines how our brains are changing along with it. She argues that a daily existence revolving around smartphones, iPads, laptops and Xboxes is radically changing not just our everyday lives, but indeed our identities. We can work, go shopping and play games all without seeing another human being. This can be socially isolating for adults. But for children who have never known a world without the internet, the author argues it can hurt their ability to learn important social skills.